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Journal articles on the topic 'Stygobiont'

Author: Grafiati

Published: 2 June 2025

Last updated: 7 July 2025

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1

Manenti, Raoul, and Beatrice Piazza. "Between darkness and light: spring habitats provide new perspectives for modern researchers on groundwater biology." PeerJ 9 (July 26, 2021): e11711. http://dx.doi.org/10.7717/peerj.11711.

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Springs are interfaces between groundwater and surface habitats and may play an important role in the study of subterranean animals. In this systematic evidence review and meta-analysis, we explore whether observations of stygobionts in springs are relevant and more common than observations of epigean animals in groundwater. We searched the Web of Science database for papers on groundwater fauna and spring fauna. For each paper we found, we recorded whether the paper reported the occurrence of typical stygobionts in springs, of surface animals in groundwater, or of the same taxa in both habitats. If so, we recorded how many such species were reported. We also recorded the scientific discipline of each study and the year of publication. Our search yielded 342 papers. A considerable number of these papers reported stygobionts in springs: 20% of papers dealing with groundwater fauna and 16% of papers dealing with spring fauna reported the occurrence of stygobionts in spring habitats. Both the number of papers that mentioned stygobionts in springs, and the number of stygobiont species that were documented in springs, were higher than equivalent measures for the occurrence of surface fauna underground. We also detected a positive relationship between year of publication and the number of reports of stygofauna in springs. To broaden the insights from biological research on underground environments, we suggest that springs should be considered not only as simple sampling points of stygobionts but also as core stygobiont habitats.

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2

Hutchins, Benjamin T., J. Randy Gibson, Peter H. Diaz, and Benjamin F. Schwartz. "Stygobiont Diversity in the San Marcos Artesian Well and Edwards Aquifer Groundwater Ecosystem, Texas, USA." Diversity 13, no. 6 (2021): 234. http://dx.doi.org/10.3390/d13060234.

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The Edwards Aquifer and related Edwards-Trinity Aquifer of Central Texas, USA, is a global hotspot of stygobiont biodiversity. We summarize 125 years of biological investigation at the San Marcos Artesian Well (SMAW), the best studied and most biodiverse groundwater site (55 stygobiont taxa: 39 described and 16 undescribed) within the Edwards Aquifer Groundwater Ecosystem. Cluster analysis and redundancy analysis (RDA) incorporating temporally derived, distance-based Moran’s Eigenvector Mapping (dbMem) illustrate temporal dynamics in community composition in 85 high-frequency samples from the SMAW. Although hydraulic variability related to precipitation and discharge partially explained changes in community composition at the SMAW, a large amount of temporal autocorrelation between samples remains unexplained. We summarize potential mechanisms by which hydraulic changes can affect community structure in deep, phreatic karst aquifers. We also compile information on 12 other Edwards and Edwards-Trinity Aquifer sites with 10 or more documented stygobionts and used distance-based RDA to assess the relative influences of distance and site type on three measures of β-diversity. Distance between sites was the most important predictor of total dissimilarity and replacement, although site type was also important. Species richness difference was not predicted by either distance or site type.

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Galbiati, Matteo, Stefano Lapadula, Martina Forlani, Benedetta Barzaghi, and Raoul Manenti. "Both Light Stimuli and Predation Risk Affect the Adult Behavior of a Stygobiont Crustacean." Diversity 15, no. 2 (2023): 290. http://dx.doi.org/10.3390/d15020290.

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Stygobiont species show common, typical traits derived from their adaptation to subterranean life. Due to the general absence of light in cave environments, the majority of them are eyeless. Although the absence of eyes generally does not allow them to perceive luminous stimuli, some stygobionts still present phototaxis. Previous studies determined that different species of the eyeless amphipod crustaceans of the genus Niphargus are able to react to light; this has been interpreted as an adaptation to avoid dangerous surface habitats, even if recent studies suggest that this could also be an adaptation to exploit them when a situation is less dangerous (i.e., during the night). Niphargus thuringius is a stygobiont amphipod that can also be observed in spring environments despite possessing all the main morphological features of subterranean organisms, such as depigmentation and a lack of eyes. In the present study, we test how the species respond to light stimuli according to the light cycle and predation risk experienced during a conditioning period. We assessed the reactions to light stimuli of adult individuals of N. thuringius after 30 days of rearing in microcosms with different conditions of light occurrence (total darkness or a light/darkness daily cycle) and predation risk (without predators, with one predator, and with two predators). Both light stimuli during the test and rearing conditions affected the behavior of Niphargus thuringius. With light stimuli, individuals presented a strong photophobic response. Moreover, individuals reared in conditions of high predation risk preferred a more sheltered environment during behavioral tests than individuals reared in safe conditions. Our results add a new species to those of stygobiont amphipods known to display negative phototaxis, confirming that this pattern is widespread and conserved in the field. N. thuringius could be a good candidate model to perform further studies aiming to assess if differences occur between spring populations and populations present in deeper groundwater.

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Lapadula, Stefano, Benedetta Barzaghi, Toffola Roberto Della, and Raoul Manenti. "Groundwater invertebrates and droughts: resistance in stygobiont isopods and planarians." ARPHA Conference Abstracts 5 (July 14, 2022): e87190. https://doi.org/10.3897/aca.5.e87190.

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In surface freshwater habitats water level can be strongly variable and benthic invertebrates are usually adapted to cope with hydrological variability. Groundwater habitats are usually more stable, even if in sites at the interface with the vadose zone, in epikarst streams and dripping pools hydroperiod may vary. Adaptations to survive droughts are thus likely to have been developed also by groundwater-dwelling animals. However very few studies have been performed to assess stygobiont resistance to dryness. They involve mainly the amphipods of the genus <em>Niphargus </em>and <em>Stygobromus</em>; one case is reported for a triclad of the genus <em>Atrioplanaria</em>.Here we describe cases of resistance to drying in stygobiont planarians of the genus <em>Dendrocoelum</em> and the in the isopod <em>Monolistra pavani</em>.Since 2016 we performed multiple surveys in 53 caves in Italy and Switzerland, sampling different stable and unstable groundwater environments. Stygobionts were searched visually and by distressing the substrate. When we detected stygobionts in dry sectors of a cave, we observed their features and behaviours, we pictured them, and we tried to rinse them. We rinsed <em>M. pavani</em> individuals in small plastic tanks and recorded the time of reactivation.During the surveys we recorded a <em>Dendrocoelum</em> planarian encapsulated in a thick mucus layer on the substrate of a dry subterranean stream. When placed in water the planarian started gliding slowly and reached a length of 18 mm. During the drought of January-April 2022, we detected individuals of <em>M. pavani</em> in dry areas of two different caves. 72% of the individuals were able to reactivate. Time to reactivate ranged between 0 s to 30 s. We recorded living <em>M. pavani</em> individuals that were able to reactivate themselves even after 39 days of drought.Our observations provide new insights into the natural history of groundwater-dwelling invertebrate taxa which global climatic changes increase the risk of drought occurrence in subterranean environments.

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5

Reboleira, Ana, Fernando Gonçalves, and Pedro Oromí. "Literature survey, bibliographic analysis and a taxonomic catalogue of subterranean fauna from Portugal." Subterranean Biology 10 (February 11, 2013): 51–60. https://doi.org/10.3897/subtbiol.10.4025.

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A bibliographic analysis of the hypogean biological studies in Portugal is made, compiling 138 publications related to the subterranean invertebrate fauna, since its begining in 1870 until November 2012.A catalogue of hypogean endemic taxa is provided, listing 27 troglobionts and 63 stygobionts, described to be obligate hypogean and endemic from mainland Portugal (Macaronesian archipelagos excluded).The first impetus on troglobiont studies was provided by the prospections of Barros Machado during 1940’s and by an expedition of Lindberg in the spring of 1961; and the major information about stygobiont species was provided by the former Instituto de Zoologia “Dr. Augusto Nobre” from Porto University.

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Manenti, Raoul, Beatrice Piazza, Yahui Zhao, Emilio Padoa Schioppa, and Enrico Lunghi. "Conservation Studies on Groundwaters’ Pollution: Challenges and Perspectives for Stygofauna Communities." Sustainability 13, no. 13 (2021): 7030. http://dx.doi.org/10.3390/su13137030.

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Assessing the effects of pollution in groundwaters is recently considered among the most relevant aims for subterranean biology; with this perspective, we aim to provide examples of the most relevant effects that pollution may cause on stygofauna community and underline patterns deserving further investigations. We retrieved different cases in which pollution caused alteration of groundwater trophic webs, favored invasions by epigean mesopredators, damaged stygobiont keystone species, and promoted interspecific competition between stygobionts and epigean animals. The results and the remarks derived from our perspective review underline that pollution may play multifaceted effects on groundwaters communities, and the paucity of information that exists on community-level changes and threats underlines the necessity for further studies.

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7

Chertoprud, Elizaveta M., Dmitri M. Palatov, and Maxim V. Vinarski. "Revealing the stygobiont and crenobiont Mollusca biodiversity hotspot in the Caucasus: Part III. Revision of stygobiont microsnails (Mollusca: Gastropoda: Hydrobiidae) from the Russian part of Western Transcaucasia, with the description of new taxa." Zootaxa 5005, no. 3 (2021): 257–75. https://doi.org/10.11646/zootaxa.5005.3.2.

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Chertoprud, Elizaveta M., Palatov, Dmitri M., Vinarski, Maxim V. (2021): Revealing the stygobiont and crenobiont Mollusca biodiversity hotspot in the Caucasus: Part III. Revision of stygobiont microsnails (Mollusca: Gastropoda: Hydrobiidae) from the Russian part of Western Transcaucasia, with the description of new taxa. Zootaxa 5005 (3): 257-275, DOI: 10.11646/zootaxa.5005.3.2

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Chertoprud, Elena S., Dmitry M. Palatov, Rostislav R. Borisov, Vadim V. Marinskiy, Michail S. Bizin, and Roman S. Dbar. "Distribution and a comparative analysis of the aquatic invertebrate fauna in caves of the western Caucasus." Subterranean Biology 18 (June 17, 2016): 49–70. https://doi.org/10.3897/subtbiol.18.8648.

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The freshwater fauna of nine caves in central Abkhazia, western Caucasus, revealed 35 species of stygobionts, including 15 new species to be described elsewhere. The number of species per station increased from the depth towards the entrance in caves Golova Otapa and Abrskila, becoming the highest in the epigean part. In both caves, two abundance peaks of aquatic invertebrates were registered: one in the entrance area, associated with the development of amphibiotic insect larvae, the other in the depths due to the high numbers of stygobionts. In Cave New Athos, the highest species richness and abundance were observed in large lakes. In caves Golova Otapa and Abrskila, two faunistic complexes with complementary distributions were found, the first due to amphibiotic insects in the cave entrance area, the second one composed of stygobionts in the deep areas. The impact of anthropogenic factors on aquatic cave communities was also noted. The stygobiotic faunas of all caves studied were clearly divided into three groups, following the number of river valleys in which they were situated. The stygobiont faunas of the caves located within one river valley appeared to be 50% similar. In contrast, the fauna composition of the stygobionts from caves situated in different valleys shared not more than 12% species in common. Stygobiotic shrimps and gastropod mollusks show profound local endemism. Stygobiotic Amphipoda penetrating the ground waters revealed wide distributions between cave systems within a single karst massif.

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PERALTA, MARCELA ALEJANDRA, and ISA MIRANDA ÁGUEDA VERÓNICA. "South America stygobiont crustaceans: a new species of Hyalellidae (Amphipoda) and new reports of Stygocarididae (Anaspidacea) and Protojaniridae (Isopoda) from Calingasta Valley, Pre-Andean region, San Juan, Argentina." Zootaxa 5264, no. 1 (2023): 001–26. http://dx.doi.org/10.11646/zootaxa.5264.1.1.

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We describe one new eyeless Hyalella species, H. cuyana n. sp., from the hyporheic zone of Calingasta River, San Juan Province, Argentina. Hyalella cuyana n. sp. differs morphologically from its stygobiont congeners by characters of antennae (both antennae subequal in size; aesthetascs elongated); coxal plate 4 (posteriorly without excavation); epimeral plates 1–3 (rounded posterodistally); male gnathopod 2 propodus (almond-shaped, ovate, palm slope strongly oblique); and pleopods (inner ramus reduced to 2–3 articles). We provide a detailed morphological comparison between stygobiont and stygophile Hyalella species. We comment on the sympatry and new report of stygobiont Malacostraca species Parastygocaris andina and Cuyojanira sp. Severe environmental changes and significant decline of habitat quality recorded along the Calingasta River increase the risk of extinction for this vulnerable and endemic fauna. We recommend that the new Hyalella species should be listed as Critically Endangered (CR) in the IUCN categorization according to criteria B1a as it is only known from the type locality; and criteria B1b iii (continuing decline, observed, inferred in the quality of habitat).

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10

Keany, Jenna. "Subterranean Species in Washington, D.C.: Spatial Analysis, Habitat Preferences, & Urban Conservation Implications." ARPHA Conference Abstracts 1 (August 30, 2018): e29300. https://doi.org/10.3897/aca.1.e29300.

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Washington, D.C. is home to a remarkable assemblage of troglomorphic amphipods and isopods living in shallow groundwater habitats, the hypotelminorheic. Groundwater from the hypotelminorheic emerges on the surface into low-flowing seepage springs, or "seeps", which are categorized as having blackened leaves, an underlain layer of clay, a drainage area of less than 10,000 m<sup>2</sup>, and are situated in slight topographical depressions. Stygobiotic species found in D.C.'s seeps include <em>Crangonyx</em> and <em>Stygobromus</em> amphipods and<em> Caecidotea</em> isopods. One species, <em>Stygobromus hayi</em>, is on the endangered species list and is endemic to the district; however, little is known about their habitat preferences or their distribution. All small water bodies, including rainwater puddles and seepage springs were sampled in national park lands in Southeast D.C. for hypotelminorheic fauna, soil morphology, and water quality indicators such as nitrates, phosphates, radon, pH, DO, and conductivity. Comparing sites with and without stygobionts, all phsysico-chemical parameters were statistically insignificant except for conductivity, which was able to distinguish between stygobiont-rich and stygobiont-poor seeps using logistic regression. Spatially, <em>Crangonyx </em>and <em>Stygobromus</em> amphipods rarely inhabit the same seepage spring, with only three occasions of cohabitation and an expected occurrence of ten. <em>Caecidotea</em>, however, is found in habitats with both amphipods. These results can be explained by either competitive exclusion or the presence of chemical differences in their habitats; however, even if there were some slight differences in their habitats, that still does not exclude competitive exclusion as an explanation. This study highlights new and important findings into the environmental preferences of D.C.'s most cryptic and rare species, and the importance of continued exploration of D.C.'s lesser known park lands.

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Rigoni, Hannah, Helena Bilandžija, and Engel Annette Summers. "Chemolithoautotrophic Organic Matter Contributions to Subterranean Food Webs Dominated by Filter-feeders." ARPHA Conference Abstracts 6 (October 17, 2023): e109094. https://doi.org/10.3897/aca.6.e109094.

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IntroductionMost groundwater and cave ecosystems depend on an influx of allochthonous, surface-derived organic matter sourced by diffuse flow through overlying rock and soil or by localized flow from the surface into sinkholes or entrances. The amount of organic matter entering the subsurface is usually low, resulting in oligotrophic conditions and food scarcity that affect community members' dispersal and colonization patterns. In situ, chemolithoautotrophically-produced organic matter has the potential to supplement organic matter pools in the subsurface, especially if the surface and subsurface are hydrologically disconnected. Chemolithoautotrophic contributions are less understood for most groundwater and cave ecosystems, especially from ecosystems dominated by sessile filter-feeders that cannot easily move to search for food. Our study focuses on uncovering the microbiology and organic matter contributions in Croatian Dinaric Karst caves, specifically in the Neretva and Lika River basins, that contain the only subterranean serpulid tube worm, <em>Marifugia cavatica, </em>the only known cave-adapted freshwater bivalves,<em> Congeria kusceri</em> and <em>Congeria jalzici</em>, and stygobitic and stygophilic sponges, <em>Eunapius subterraneus</em> and <em>Ephydatia fluviatilis</em>, respectively.MethodsWe collected surface water, invertebrates, and representative examples of surface organic matter, as well as subsurface water, stygobionts, biofilms, and sediments from Pukotina u Tunelu Polje Jezero in the Neretva River basin and Markov Ponor and Susik Ponor in the Lika River basin. To evaluate microbial communities, 16S rRNA genes were sequenced, analyzed using mothur to obtain operational taxonomic units (OTUs) at 99% sequence similarity, and classified with the SILVA v138.1 reference database. We used the program FAPROTAX and recently published literature to identify putative metabolisms for OTUs, focusing on identifying chemolithoautotrophic functions. We measured stable carbon (δ13C) and nitrogen (δ15N) isotope compositions to assess potential food sources for the stygobionts from surface and subsurface materials.We compared microbial community diversity among caves and sample types using non-metric multidimensional scaling (NMDS) on a Bray-Curtis dissimilarity matrix of rarefied presence/absence data. Analysis of similarity (ANOSIM) on the dissimilarity matrix was used to compare sample type and cave. Welch's t-test was used to compare differences in isotopic composition between surface and caves, and Kruskal-Wallis was used to compare differences among caves. Markov Chain Monte Carlo simulations were employed using mixSIAR v3.1.12, with a chain length of 100000, to calculate the contribution of food sources using a diet tissue discrimination factor of δ13C=1.2±0.39‰ and δ15N=4±0.18‰. All analyses were performed in R using vegan (v. 2.6.4) and stats (v. 4.2) packages.Results and DiscussionMicrobial community composition varied significantly among sample types in each cave (ANOSIM; R=0.74, p<0.005) but weakly among caves and the surface (ANOSIM; R=0.19, p=0.019, Fig. 1a). Putative chemolithoautotrophs included methylotrophs, dissimilatory nitrate-reducers, sulfur-compound-oxidizers, and hydrogen-oxidizers (Fig. 1b). Nitrospirales comprised 2.4% to 10.7% of the biofilms but ≤ 0.2% in water. In Markov Ponor and Susik Ponor, putative methylotrophs (order Methylococcales) comprised 14.0% to 28.3% of the sequence reads in water and 1.2% to 38.7% of reads from biofilms and sediment (Fig. 1b).We hypothesized that isotopic compositions of filter-feeding stygobiont tissues would point to diets that relied on chemolithoautotrophic carbon. δ13C values for dissolved organic carbon in the caves were statistically similar to those of surface water, at -23.9±1.7‰ (n=9), as was dissolved inorganic carbon, at -6.4±2.9‰ (n=8). δ15N values from the cave water ranged from 4.7‰ to 13.9‰, whereas δ15N values from the surface was 9.6‰. Cave biofilm δ13C and δ15N values ranged, respectively, from -29.8‰ to -27.2‰ (average -28.6‰, n=22) and 3.0‰ to 8.2‰ (average 5.8‰, n=20). In contrast, photosynthetic organic matter from the surface ranged from δ13C of -45.7‰ to -17.0‰ and δ15N from 2.4‰ to 6.9‰. Surface invertebrates ranged from δ13C of -32.7‰ to -19.0‰ and δ15N of 1.1‰ to 7.5‰. <em>M. cavatica</em> tissues from the two river basins did not vary significantly, ranging from δ13C of -32‰ to -33‰, but δ15N varied significantly (Welch's t-test p<0.005). The isotopic compositions of <em>Congeria</em> spp. and the sponges varied significantly between the two river basins.Different chemolithoautotrophic pathways have the potential to discriminate against 13C by up to 35‰ or more and 15N from 0‰ to 18‰. Contributions from such fractionation values were evident in biofilm and stygobiont δ13C values compared to surface organic matter δ13C values. Preliminary mixing model results suggest that allochthonous organic matter contributed to most of the stygobionts' diet, likely due to high flow and input rates during the rainy season prior to collection. However, chemolithoautotrophically-produced organic matter could contribute up to 10% of some stygobiont diets, depending on the stygobiont and cave system (Fig. 1c). As such, there is potential that in situ chemolithoautotrophically-produced organic matter could serve as a small dietary buffer for sessile stygobionts during changes in surface conditions that affect the water supply and nutrient input. This research has implications for understanding the microbial ecology and diversity of Croatian karst that support endemic fauna and should motivate efforts to protect the watersheds associated with their habitats.

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Ghamizi, Mohamed, and Mokhtar Boulal. "New stygobiont snail from groundwater of Morocco (Gastropoda: Moitessieriidae)." Ecologica Montenegrina 10 (January 25, 2017): 11–13. https://doi.org/10.37828/em.2017.10.2.

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Angyal, Dorottya, Nuno Simões, and Maite Mascaró. "Uptaded checklist, historical overview and illustrated guide to the stygobiont Malacostraca (Arthropoda: Crustacea) species of Yucatan (Mexico)." Subterranean Biology 36 (November 30, 2020): 83–108. http://dx.doi.org/10.3897/subtbiol.36.53558.

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This study provides an updated checklist and an illustrated guide to the 17 currently known stygobiont Malacostraca species of the state of Yucatan (Yucatan Peninsula, Mexico). The compilation is based on the individuals collected during our cave-diving expeditions (2016–2019), and, has the purpose of expanding previous knowledge on the taxonomy of these subterranean crustaceans. The identification guide contains drawings of the main diagnostic characters of the species as well as a brief introduction of the relevant malacostracan orders. The information is further complemented with a historic account and timeline of the stygobiont Malacostraca species of the Yucatan Peninsula. This is the first study that provides a unified tool for the morphological identification of these highly endemic species.

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DOLE-OLIVIER, MARIE-JOSE, HINDA HAFID, and CHRISTOPHE PISCART. "A new groundwater species of Pseudoniphargus (Amphipoda: Pseudoniphargidae) fromAlgeria." Zootaxa 4482, no. 1 (2018): 125. http://dx.doi.org/10.11646/zootaxa.4482.1.5.

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Intensive sampling performed in the area of Oum El Bouaghi (Northeastern Algeria) yielded a new species of the stygobiont amphipod Pseudoniphargus, P. djemoi, in wells located in the plain of Tamlouka. The new species belongs to a group that shares the display of a uropod 3 exopod extremely elongate and upcurved in the male, whereas its peduncle is only moderately elongate. This cluster of species appears scattered across the southern Iberian Peninsula, Northern Morocco and the Canary Islands. This discovery increases the number of described species of the stygobiont amphipod genus Pseudoniphargus in north Africa to eight. A key to the species of Pseudoniphargus living in Continental Africa and Mediterranean Islands is provided.

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Angyal, Dorottya, Nuno Simões, and Maite Mascaró. "Uptaded checklist, historical overview and illustrated guide to the stygobiont Malacostraca (Arthropoda: Crustacea) species of Yucatan (Mexico)." Subterranean Biology 36 (November 30, 2020): 83–108. https://doi.org/10.3897/subtbiol.36.53558.

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This study provides an updated checklist and an illustrated guide to the 17 currently known stygobiont Malacostraca species of the state of Yucatan (Yucatan Peninsula, Mexico). The compilation is based on the individuals collected during our cave-diving expeditions (2016–2019), and, has the purpose of expanding previous knowledge on the taxonomy of these subterranean crustaceans. The identification guide contains drawings of the main diagnostic characters of the species as well as a brief introduction of the relevant malacostracan orders. The information is further complemented with a historic account and timeline of the stygobiont Malacostraca species of the Yucatan Peninsula. This is the first study that provides a unified tool for the morphological identification of these highly endemic species.

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Stock, J. H. "Some remarkable distribution patterns in stygobiont Amphipoda." Journal of Natural History 27, no. 4 (1993): 807–19. http://dx.doi.org/10.1080/00222939300770491.

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Ghamizi, Mohamed, and Mokhtar Boulal. "NEW STYGOBIONT SNAIL FROM GROUNDWATER OF MOROCCO (GASTROPODA: MOITESSIERIIDAE)." Ecologica Montenegrina 10 (January 25, 2017): 11–13. http://dx.doi.org/10.37828/em.2017.10.2.

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Manconi, Renata. "A new species of stygobiont freshwater planarian (Platyhelminthes, Tricladida) from a chemoautotrophic ecosystem: the Frasassi karst in Italy." Zootaxa 4323, no. 4 (2017): 547–60. https://doi.org/10.11646/zootaxa.4323.4.7.

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Manconi, Renata (2017): A new species of stygobiont freshwater planarian (Platyhelminthes, Tricladida) from a chemoautotrophic ecosystem: the Frasassi karst in Italy. Zootaxa 4323 (4): 547-560, DOI: 10.11646/zootaxa.4323.4.7

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Ghamizi, Mohamed. "New stygobiont genus and new species (Gastropoda, Hydrobiidae) from the Rif (Morocco)." Ecologica Montenegrina 31 (May 30, 2020): 50–56. https://doi.org/10.37828/em.2020.31.11.

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Ghamizi, Mohamed (2020): New stygobiont genus and new species (Gastropoda, Hydrobiidae) from the Rif (Morocco). Ecologica Montenegrina 31: 50-56, DOI: 10.37828/em.2020.31.11, URL: http://dx.doi.org/10.37828/em.2020.31.11

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Sket, Boris. "HIGH BIODIVERSITY IN HYPOGEAN WATERS AND ITS ENDANGERMENT – THE SITUATION IN SLOVENIA, THE DINARIC KARST, AND EUROPE." Crustaceana 72, no. 8 (1999): 767–79. http://dx.doi.org/10.1163/156854099503951.

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AbstractOf approximately 12,600 aquatic animal species, registered in 1978 in Europe, more than 200 were facultative cave dwellers, approximately 1,000 species (in 1998 already 2,000 taxa) or 8%, were specialized stygobionts. More than half are Crustacea. The relatively high number of crustacean hypogean species is rendered possible mainly by (1) the absence of their insect competitors as well as (2) spatial partition due to the small distribution areas of most stygobionts. Slovenia, with approximately 200 taxa in its 20,000 km2, has the highest density, and the Dinaric area with nearly 400 taxa in its only 153,400 km2 has the highest absolute number of stygobiont taxa known in the world. The situation is similar for terrestrial cave faunas. The crustacean diversity is mostly a result of ecological and morphological diversification within a few genera (e.g., Niphargus, Proasellus, Monolistra). However, higher taxa (families, orders) are well represented. Besides some non-specialized newcomers to hypogean habitats, some ubiquitous species (e.g., Asellus aquaticus, Synurella ambulans) possess a number of isolated hypogean populations that are troglomorphic to varying degrees. Hypogean species are endangered by urbanization and other uses of the sensitive karst landscape. Although a slight organic pollution of the energy poor cave waters is favourable to their inhabitants, it may enable invaders from the surface to outcompete troglomorphic specialists in sinking rivers. Conservation of cave species is very demanding, since it requires protection of the whole drainage areas on the surface. Von ungefahr 12.600 im Jahre 1978 registrierten aquatischen Tierarten in Europa, waren mindestens 200 fakultative Hohlenbewohner und etwa 1.000 Arten (1998 schon 2.000 Taxa), also 8%, waren spezialisierte Stygobionten. Mehr als die Halfte davon sind Krebsarten (Crustacea). Zwei Hauptfaktoren ermoglichen vermutlich die relativ hohe Zahl der unterirdischen Krebsarten: (1) die Abwesenheit der kompetierenden Insekten und (2) eine kleinraumliche Einteilung der Verbreitungsareale (wass eine allgemeine Folge des hohen Endemismus der Stygobionten Arten, nicht nur der Krebse, ist). Slovenien hat mit etwa 200 Stygobionten Taxa auf einer Flache von 20.000 km2 die hochste bekannte Arten-Dichte und das Dinarische Gebiet hat mit fast 400 Taxa auf einer Flache von 153.400 km2 die artenreichste Stygofauna der Welt. Diese Verhaltnisse sind auch bei den terrestrischen Hohlenfaunen ahnlich. Der Artenreichtum der Crustacea ist vor allem eine Folge der okologischen und morphologischen Differenzierung innerhalb einiger Gattungen (z.B. Niphargus, Proasellus, Monolistra). Weiterhin sind aber auch hohere Taxa (Familien, Ordnungen) zahlreich vertreten. Nebst einiger nicht spezialisierten (Neu-)Einwanderer in unterirdische Habitate gibt es auch isolierte Populationen einiger ubiquistischen Arten (z.B. Asellus aquaticus, Synurella ambulans), die schon teilweise troglomorph sind. Unterirdische Arten sind bedroht durch Urbanisierung und andere Nutzungsformen der empfindlichen Karst-Landschaft. Obwohl eine leichte organische Verunreinigung der nahrstoffarmen Hohlengewasser fur ihre Einwohner gunstig ist, erleichtert sie in Sickerflussen das eindringen epigaischer Arten, die troglomorphe Spezialisten verdrangen konnen. Der Schutz von Hohlenarten ist ein anspruchsvolles Vorhaben, dass den Schutz ganzer Gewassersysteme an der Oberflache erfordert.

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21

Quiñonero-Salgado, Sergio, Joaquín López-Soriano, and Emilio Rolán. "A new stygobiont species of the genus Hadziella Kuščer, 1932 (Gastropoda: Hydrobiidae) from Spain." Nemus 13 (December 31, 2023): 120–25. https://doi.org/10.5281/zenodo.12170571.

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Quiñonero-Salgado, Sergio, López-Soriano, Joaquín, Rolán, Emilio (2023): A new stygobiont species of the genus Hadziella Kuščer, 1932 (Gastropoda: Hydrobiidae) from Spain. Nemus 13: 120-125, DOI: 10.5281/zenodo.12170571

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22

Chávez Solís, Efrain M., Maite Mascaro, Carlos Rosas, et al. "Are haloclines distributional barriers in anchialine ecosystems? Physiological response of cave shrimps to salinity." PLOS ONE 19, no. 7 (2024): e0305909. http://dx.doi.org/10.1371/journal.pone.0305909.

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Anchialine systems are coastal groundwater habitats around the world which host a unique community of cave adapted species (stygobionts). Such communities are expected to be separated by haloclines into either fresh or saline groundwater communities, hence climate changes (e.g., eustatic sea level shifts) and anthropic driven changes (e.g., salinization) may have a great impact on these stygobiont communities. Here we used cave-restricted species of Typhlatya from the Yucatan Peninsula as models to identify physiological capacities that enable the different species to thrive in marine groundwater (T. dzilamensis) or fresh groundwater (T. mitchelli and T. pearsei), and test if their distribution is limited by their salinity tolerance capacity. We used behavior, metabolic rates, indicators of the antioxidant system and cellular damage, and lactate content to evaluate the response of individuals to acute changes in salinity, as a recreation of crossing a halocline in the anchialine systems of the Yucatan Peninsula. Our results show that despite being sister species, some are restricted to the freshwater portion of the groundwater, while others appear to be euryhaline.

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Corbella, Alonso Jordi, Mestre Glòria Guillén, Pi Lluis Prats, Ruestes Antoni Tarruella, and David M. Alba. "Spiralix calida sp. nov. (Gastropoda: Moitessieriidae), una nova espècie de gastròpode estigobi de Toga (l'Alt Millars, País Valèncià, Espanya)." Spira 5, no. 3 (2014): 111–20. https://doi.org/10.5281/zenodo.8278833.

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Spiralix calida sp. nov. (Gastropoda: Moitessieriidae), a new species of stygobiont gastropod from Toga (l’Alt Millars, Valencian Country, Spain).—A new stygobiont snail, Spiralix (Spiralix) calida sp. nov. (Gastropoda: Moitessieriidae), is described based on shells from Font Calenta (Toga, l’Alt Millars, Valencian Country), in the province of Castellon. The new taxon differs from French species of the same genus by lacking a conspicuous teleoconch ornamentation, thus more closely resembling the various species of Spiralix previously known from Spain, from which it differs by size, the number of whorls and/or the less conical and slenderer shape of the shell. The description of this taxon reinforces the significance of the Iberian Levant (in particular, the provinces of Castellon and Valencia) as a diversity hotspot of this genus.

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24

Achurra, Ainara, Michel Creuze Des Chatelliers, and Pilar Rodriguez. "Troglodrilus jugeti n. sp. (Annelida, Clitellata, Tubificinae), a new stygobiont oligochaete species from south-western Europe." Zootaxa 3229 (December 31, 2012): 35–46. https://doi.org/10.5281/zenodo.280340.

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Achurra, Ainara, Chatelliers, Michel Creuze Des, Rodriguez, Pilar (2012): Troglodrilus jugeti n. sp. (Annelida, Clitellata, Tubificinae), a new stygobiont oligochaete species from south-western Europe. Zootaxa 3229: 35-46, DOI: 10.5281/zenodo.280340

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25

Gómez, Patricia, and Fernando Calderón-Gutiérrez. "Anchialine cave-dwelling sponge fauna (Porifera) from La Quebrada, Mexico with the description of the first Mexican stygobiont sponges." Zootaxa 4803, no. 1 (2020): 125–51. https://doi.org/10.11646/zootaxa.4803.1.7.

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Gómez, Patricia, Calderón-Gutiérrez, Fernando (2020): Anchialine cave-dwelling sponge fauna (Porifera) from La Quebrada, Mexico with the description of the first Mexican stygobiont sponges. Zootaxa 4803 (1): 125-151, DOI: 10.11646/zootaxa.4803.1.7

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26

Jaume, Damià, and H. P. Wagner. "New cave-dwelling amphipods (Lysianassidae, Hadziidae) from the Dominican Republic (Hispaniola)." Contributions to Zoology 68, no. 1 (1998): 37–66. http://dx.doi.org/10.1163/18759866-06801003.

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Two new stygobiont amphipods are described from anchialine caves located in the Jaragua region (Pedernales Prov., Dominican Republic, Hispaniola). Ottenwalderia kymbalion gen. et sp. nov. is the first lysianassoid known to have penetrated into completely fresh waters, and the fourth colonizing hypogean habitats. Bahadzia jaraguensis sp. nov. is the second representative of this West Indian thalasso-stygobiont genus to be reported from fresh waters; it exhibits the most troglomorphic aspect (i.e. elongation of first antennae and sixth pereiopods) recorded for the genus. Its diagnosis is complemented with a key to the species of the genus Bahadzia. The in situ swimming behaviour of both taxa is briefly described. It is postulated that both amphipods share a rather recent, Plio-Pleistocene marine origin, having invaded passively the continental waters in the way described by the so-called Regression model.

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Grego, Jozef. "Revision of the stygobiont gastropod genera Plagigeyeria Tomlin, 1930 and Travunijana Grego & Glöer, 2019 (Mollusca; Gastropoda; Moitessieriidae and Hydrobiidae) in Hercegovina and adjacent regions." European Journal of Taxonomy 691 (July 27, 2020): 1–56. https://doi.org/10.5852/ejt.2020.691.

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Grego, Jozef (2020): Revision of the stygobiont gastropod genera Plagigeyeria Tomlin, 1930 and Travunijana Grego & Glöer, 2019 (Mollusca; Gastropoda; Moitessieriidae and Hydrobiidae) in Hercegovina and adjacent regions. European Journal of Taxonomy 691: 1-56, DOI: 10.5852/ejt.2020.691

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Fransen, Charles H.J.M., and K. Van Damme. "A new stygobiont species of Halocaridinides Fujino & Shokita, 1975 (Crustacea, Decapoda, Caridea, Atyidae) from caves on Socotra Island (Yemen), with notes on the genus." Zootaxa 4442, no. 2 (2018): 241–61. https://doi.org/10.11646/zootaxa.4442.2.3.

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Fransen, Charles H.J.M., Damme, K. Van (2018): A new stygobiont species of Halocaridinides Fujino & Shokita, 1975 (Crustacea, Decapoda, Caridea, Atyidae) from caves on Socotra Island (Yemen), with notes on the genus. Zootaxa 4442 (2): 241-261, DOI: 10.11646/zootaxa.4442.2.3

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RODRIGUEZ, PILAR. "New genus of Lumbriculidae (Annelida, Clitellata) from a karst spring in the Cantabrian Mountains, northern Spain." Zootaxa 5306, no. 4 (2023): 481–89. http://dx.doi.org/10.11646/zootaxa.5306.4.6.

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The groundwater worms of the family Lumbriculidae exhibit high diversity and endemism in southern Europe. All stygobiont lumbriculid species known so far in this region belong to six genera. In the present study, a new stygobiont lumbriculid Fendia cantabrica n. gen. n. sp. is described, mainly based on distinct characteristics of the male duct structure. The male duct is semiprosoporous and the spermathecae (two pairs) are postatrial, starting in the ovarian segment. These characteristics are shared with only two lumbriculid genera: the Nearctic Eremidrilus and Holarctic Trichodrilus. The new genus is clearly distinguished from the former by the absence of proboscis, and from both genera by a remarkably complex structure of the atrium: a very strong musculature organized in several crossed layers, a protrusible penis with a singular hydrostatic skeleton, and two prostate glands, which join separately to the atrial ampulla by short stalks.

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30

Stock, Jan H. "Stygobiont Amphipod Crustaceans of the Hadzioid Group from Haiti." Bijdragen tot de Dierkunde 55, no. 2 (1985): 331–426. http://dx.doi.org/10.1163/26660644-05502011.

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The stygobiont gammarids of Haiti are more diversified than anywhere else in the world: not less than 13 species (all new) in 7 genera (5 new) and 4 subgenera (all new) are described of a somewhat loosely delimited group called the hadzioids/weckelioids.

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Notenboom, Jos. "Phylogenetic Relationships and Biogeography of the Groundwater-Dwelling Amphipod Genus Pseudoniphargus (Crustacea), with Emphasis on the Iberian Species." Bijdragen tot de Dierkunde 58, no. 2 (1988): 159–204. http://dx.doi.org/10.1163/26660644-05802002.

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Numerical phylogenetic methods are applied in order to arrive at synapomorphic similarities between species of the stygobiont amphipod genus Pseudoniphargus. Character polarity is assessed by comparison with the relevant outgroups Parapseudoniphargus and Allomelita, within a cluster of presumedly interrelated genera of Hadzioidea.

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Iliffe, Thomas M., and Fernando Calderón-Gutiérrez. "Bermuda’s Walsingham Caves: A Global Hotspot for Anchialine Stygobionts." Diversity 13, no. 8 (2021): 352. http://dx.doi.org/10.3390/d13080352.

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Bermuda is an Eocene age volcanic island in the western North Atlantic, entirely capped by Pleistocene eolian limestone. The oldest and most highly karstified limestone is a 2 km2 outcrop of the Walsingham Formation containing most of the island’s 150+ caves. Extensive networks of submerged cave passageways, flooded by saltwater, extend under the island. In the early 1980s, cave divers initially discovered an exceptionally rich and diverse anchialine community inhabiting deeper sections of the caves. The fauna inhabiting caves in the Walsingham Tract consists of 78 described species of cave-dwelling invertebrates, including 63 stygobionts and 15 stygophiles. Thus, it represents one of the world’s top hotspots of subterranean biodiversity. Of the anchialine fauna, 65 of the 78 species are endemic to Bermuda, while 66 of the 78 are crustaceans. The majority of the cave species are limited in their distribution to just one or only a few adjacent caves. Due to Bermuda’s high population density, water pollution, construction, limestone quarries, and trash dumping produce severe pressures on cave fauna and groundwater health. Consequently, the IUCN Red List includes 25 of Bermuda’s stygobiont species as critically endangered.

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33

Glöer, Peter, and Vladimir Pešić. "NEW SUBTERRANEAN FRESHWATER GASTROPODS OF MONTENEGRO (MOLLUSCA: GASTROPODA: HYDROBIIDAE), WITH DESCRIPTION OF ONE NEW GENUS AND TWO NEW SPECIES." Ecologica Montenegrina 1, no. 4 (2014): 244–48. http://dx.doi.org/10.37828/em.2014.1.32.

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Two new stygobiont species of the family Hydrobiidae Troschel, 1857, i.e. Iverakia hausdorfi n. gen. n. sp. and Bythiospeum demattiai n. sp. were described. The both species have been collected from the spring Iverak near Podgorica. Descriptions and photos of the holotypes are presented.

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Martin, Patrick, Rüdiger M. Schmelz, and Marie-José Dole-Olivier. "Groundwater oligochaetes (Annelida, Clitellata) from the Mercantour National Park (France), with the descriptions of one new genus and two new stygobiont species." Zoosystema 37, no. 4 (2015): 551–69. https://doi.org/10.5252/z2015n4a2.

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Martin, Patrick, Schmelz, Rüdiger M., Dole-Olivier, Marie-José (2015): Groundwater oligochaetes (Annelida, Clitellata) from the Mercantour National Park (France), with the descriptions of one new genus and two new stygobiont species. Zoosystema 37 (4): 551-569, DOI: 10.5252/z2015n4a2, URL: http://dx.doi.org/10.5252/z2015n4a2

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35

von Rintelen, Kristina, Carla M. A. Rumpf, Daisy Wowor, Andreas Wessel, and Thomas von Rintelen. "A phylogeographic approach to Sulawesi’s Maros karst shrimp fauna (Decapoda, Atyidae) reveals several cave invasions and challenges current taxonomic hypotheses." Crustaceana 97, no. 5-9 (2024): 479–505. http://dx.doi.org/10.1163/15685403-bja10383.

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Abstract The unique endemic cave fauna of the Maros karst cave system (Sulawesi, Indonesia) includes atyid freshwater shrimps only known from their species descriptions. An extensive survey revealed a total of ten species in epigean and subterranean rivers: Two non-endemic, four species endemic to Sulawesi (genus Caridina) and four stygobiont species (genus Caridina, Marosina, and Parisia) only endemic to the Maros karst. A molecular phylogeny revealed (1) two independent colonizations of Sulawesi’s Maros karst caves by species of Caridina (Clade 1) derived from endemic ancestors, and (2) an exclusively stygobiont group (Clade 2, Marosina, Parisia) possibly derived from an amphidromous, anchialine cave-dweller. Our approach revealed another cryptic cave species of Caridina and challenges the taxonomic status of four Sulawesi endemics. In conclusion, the freshwater shrimps of the Maros karst are a challenging but rewarding group that can contribute to our understanding of the evolution of cave-dwelling species and atyid phylogenetics.

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Glöer, Peter, and Vladimir Pešić. "NEW SUBTERRANEAN FRESHWATER GASTROPODS OF MONTENEGRO (MOLLUSCA: GASTROPODA: HYDROBIIDAE)." Ecologica Montenegrina 1, no. 2 (2014): 82–88. http://dx.doi.org/10.37828/em.2014.1.11.

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New stygobiont species of Hydrobiidae were described. Both new species and one new genus, Plagigeyeria lukai n. sp. and Zeteana ljiljanae n. gen. et n. sp., have been collected in a spring from village Pričelje near Pogorica. An updated checklist of hydrobiids snails from Montenegro is given.

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37

Ghamizi, Mohamed. "New stygobiont genus and new species (Gastropoda, Hydrobiidae) from the Rif (Morocco)." Ecologica Montenegrina 31 (May 30, 2020): 50–56. http://dx.doi.org/10.37828/em.2020.31.11.

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Stygobiont valvatoid hydrobiids living in the groundwater were collected from a survey in the wells in the Rif region, in northern Morocco. The description of the shells, the male and the female genitalia revealed a character combination for a new genus, Rifia n.gen. The map of the distribution is given.

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38

Alejandra, Marcela, Águeda Verónica, and Isa Miranda. "South America stygobiont crustaceans: a new species of Hyalellidae (Amphipoda) and new reports of Stygocarididae (Anaspidacea) and Protojaniridae (Isopoda) from Calingasta Valley, Pre-Andean region, San Juan, Argentina." Zootaxa 5264, no. 1 (2023): 1–26. https://doi.org/10.11646/zootaxa.5264.1.1.

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Alejandra, Marcela, Verónica, Águeda, Miranda, Isa (2023): South America stygobiont crustaceans: a new species of Hyalellidae (Amphipoda) and new reports of Stygocarididae (Anaspidacea) and Protojaniridae (Isopoda) from Calingasta Valley, Pre-Andean region, San Juan, Argentina. Zootaxa 5264 (1): 1-26, DOI: 10.11646/zootaxa.5264.1.1, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.1

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39

Glasby, Christopher J., Dieter Fiege, and Kay Van Damme. "Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species." Zoological Journal of the Linnean Society 171, no. 1 (2014): 22–37. https://doi.org/10.1111/zoj.12130.

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Glasby, Christopher J., Fiege, Dieter, Damme, Kay Van (2014): Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species. Zoological Journal of the Linnean Society 171 (1): 22-37, DOI: 10.1111/zoj.12130, URL: http://dx.doi.org/10.1111/zoj.12130

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40

Chertoprud, E. M., D. M. Palatov, and M. V. Vinarski. "Revealing the stygobiont and crenobiont Mollusca biodiversity hotspot in Caucasus: Part II. Sitnikovia gen. nov., a new genus of stygobiont microsnails (Gastropoda: Hydrobiidae) from Georgia." Zoosystematica Rossica 29, no. 2 (2020): 258–66. http://dx.doi.org/10.31610/zsr/2020.29.2.258.

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A new genus of stygobiont hydrobiid snails, endemic to Georgia, is described. Sitnikovia gen. nov. includes two species: S. megruli sp. nov. and S. ratschuli sp. nov., known only from their type localities (Garakha and Sakishore caves). The data of shell characters, penial morphology, and radula of the new genus are provided.

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41

Ruffo, Sandro. "New stygobiont amphipods (Crustacea Amphipoda) from the Philippine Islands." Tropical Zoology 7, no. 2 (1994): 355–66. http://dx.doi.org/10.1080/03946975.1994.10539265.

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42

Bradbury, J. H. (John Hugh), and S. Eberhard. "A New Stygobiont Melitid Amphipod from the Nullarbor Plain." Records of the Western Australian Museum 20 (June 12, 2000): 39–50. https://doi.org/10.5281/zenodo.13411954.

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Bradbury, J. H. (John Hugh), and S. Eberhard. "A New Stygobiont Melitid Amphipod from the Nullarbor Plain." Records of the Western Australian Museum 20 (June 7, 2000): 39–50. https://doi.org/10.5281/zenodo.13411954.

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44

Bradbury, J. H. (John Hugh), and S. Eberhard. "A New Stygobiont Melitid Amphipod from the Nullarbor Plain." Records of the Western Australian Museum 20 (June 19, 2000): 39–50. https://doi.org/10.5281/zenodo.13411954.

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45

Holsinger, John R., and D. Patrick Shaw. "Stygobromus quatsinensis, a new amphipod crustacean (Crangonyctidae) from caves on Vancouver Island, British Columbia, with remarks on zoogeographic relationships." Canadian Journal of Zoology 65, no. 9 (1987): 2202–9. http://dx.doi.org/10.1139/z87-334.

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Stygobromus quatsinensis, a new species of subterranean, freshwater amphipod crustacean, is described from caves on Vancouver Island, British Columbia, Canada. This is the 3rd stygobiont amphipod recorded from Canada and the 11th member of the genus Stygobromus to be found in localities north of the southern limits of Pleistocene glaciation. Stygobromus quatsinensis is a member of the hubbsi group, an assemblage of closely similar stygobiont species previously recorded from the central and western United States south of British Columbia. Two alternative hypotheses are proposed to explain the presence of S. quatsinensis on a glaciated island separated from the mainland by marine straits. One theory suggests that it evolved from putative ancestors that were present on the island before development of the Juan de Fuca Strait in the Eocene. The other suggests that it gained access to the island from the mainland through interstitial routes in coarse sediments of the Quadra Sand which infilled parts of the Georgia Strait in the late Pleistocene. Both theories assume that this species has survived glaciation in subglacial groundwater refugia.

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46

Macario-González, Laura, Sergio Cohuo, Dorottya Angyal, Liseth Pérez, and Maite Mascaró. "Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda)." Diversity 13, no. 2 (2021): 44. http://dx.doi.org/10.3390/d13020044.

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The Yucatán Peninsula is a karstic region, rich in subterranean environments with a diverse crustacean stygobiont fauna. In order to gain insights into the biological evolution of the subterranean environments of this region, we evaluated the ostracode species composition of caves and cenotes in five independent sampling campaigns (2008, 2013, 2017–2019). Using morphometric analyses, we evaluated inter-population morphological variability; using molecular analysis based on mitochondrial COI and nuclear 18S rDNA, we evaluated genetic differentiation in selected species. The observed fauna is composed of 20 (epigean) species, presenting a lack of strict stygobionts. Morphometric analyses discriminated up to three morphotypes in each of the three most abundant species: Cytheridella ilosvayi, Alicenula sp. and Cypridopsis vidua. High intraspecific morphological variability was found either in shape or size. Phylogenetic analysis based on COI demonstrated the existence of three lineages on C. ilosvayi, with high support (>0.9). The 18S rDNA sequences were identical among individuals of different populations. A lack of congruence between the genetic markers precluded us from postulating speciation in subterranean environments. It is likely that Late Pleistocene—Early Holocene climate variation related to sea level and precipitation was forcing agent for epigean ostracode dominance in subterranean environments of the Peninsula.

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Grego, Jozef, Dorottya Angyal, and Luis Arturo Liévano Beltrán. "First record of subterranean freshwater gastropods (Mollusca, Gastropoda, Cochliopidae) from the cenotes of Yucatán state." Subterranean Biology 29 (February 18, 2019): 79–88. http://dx.doi.org/10.3897/subtbiol.29.32779.

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The biospeleological investigations of several cenotes in the eastern region of Yucatán state, Mexico, during January 2018 yielded, among other invertebrates, two new truncatelloid gastropod species described herein as Mexicenoticaxochiigen. n. et sp. n. and Pyrgophorusthompsonisp. n. Both species represent the first record of stygobiont gastropod species from the cenotes of Yucatán indicating the high biodiversity potential of the studied area.

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48

Baltanás, Angel. "Eusarsiella bedoyai (Myodocopida, Sarsiellidae), a new ostracode species from a marine lava cave in the Canary Islands." Bijdragen tot de Dierkunde 61, no. 4 (1992): 251–55. http://dx.doi.org/10.1163/26660644-06104005.

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A new species of the ostracode genus Eusarsiella (Myodocopida, Sarsiellidae) is described from a marine lava tube in Lanzarote (Canary Islands) and compared with other species known to occur in the same geographical area. Eusarsiella bedoyai n. sp. is the second species in that genus described from anchialine caves. Its importance in determining the origin of the stygobiont fauna is briefly discussed.

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Khaustov, Alexander A., Vasiliy B. Kolesnikov, Ilya S. Turbanov, and Andrei V. Tolstikov. "A new troglobiont species of Rhagidiidae (Acari: Eupodoidea) from cave sites in the Ural Mountains (Russia)." Acarologia 64, no. 3 (2024): 787–802. http://dx.doi.org/10.24349/o7sw-gepq.

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A new troglobiont species, Foveacheles uralensis n. sp., is described from the Gremutshaya, Rossiyskaya, and the Shulgan-Tash caves of the Ural Mountains. The new species is characterized by intermediate character states between the genera Foveacheles and Traegaardhia and its taxonomic position is discussed. The current state of the troglobiont and stygobiont arthropod fauna of the Ural Mountain caves is also discussed.

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Harrath, Abdel Halim, Lamjed Mansour, Moissou, et al. "A molecular analysis of the phylogenetic position of the suborder Cavernicola within the Tricladida (Platyhelminthes), with the description of a new species of stygobiont flatworm from Benin." Zoological Journal of the Linnean Society 178, no. 3 (2016): 482–91. https://doi.org/10.1111/zoj.12430.

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Abstract:

Harrath, Abdel Halim, Mansour, Lamjed, Moissou, Lagnika, Sluys, Ronald, Boutin, Claude, Alwasel, Saleh, Poch, Arnau, Riutort, Marta (2016): A molecular analysis of the phylogenetic position of the suborder Cavernicola within the Tricladida (Platyhelminthes), with the description of a new species of stygobiont flatworm from Benin. Zoological Journal of the Linnean Society 178 (3): 482-491, DOI: 10.1111/zoj.12430, URL: http://dx.doi.org/10.1111/zoj.12430

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