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Journal articles on the topic 'Passalus'

Author: Grafiati

Published: 3 June 2025

Last updated: 22 June 2025

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1

Hunter, Preston E., and Rose M. T. Rosario. "TWO NEW GENERA AND SPECIES OF EUZERCONIDAE (MESOSTIGMATA: CELAENOPSOIDEA) WITH A KEY TO NEW WORLD GENERA." Journal of Entomological Science 24, no. 2 (1989): 241–51. http://dx.doi.org/10.18474/0749-8004-24.2.241.

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Two new genera and species of mites of the family Euzerconidae are described. Trinizercon atyeoi Hunter and Rosario, n. gen., n. sp., is described from specimens collected from the beetle Passalus (Passalus) interruptus (Lineo) (Passalidae) in Trinidad. Etazercon starri Hunter and Rosario, n. gen., n. sp., is described from specimens collected from the beetle Passalus (Passalus) jansoni (Bates) (Passalidae) in Costa Rica.

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2

Castillo, C., L. E. Rivera Cervantes, and Pedro Reyes Castillo. "ESTUDIO SOBRE LOS PASSALIDAE (COLEOPTERA: LAMELLICORNIA) DE LA SIERRA DE MANANTLAN, JALISCO, MEXICO'." ACTA ZOOLÓGICA MEXICANA (N.S.), no. 30 (December 7, 1988): 1–20. http://dx.doi.org/10.21829/azm.1988.25301650.

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Los Passalidae de la Sierra de Manantlán, Jalisco, comprenden tres especies de amplia distribución en las tierras bajas tropicales de México y Centroamérica, agrupadas en la tribu Passalini: Ptichopus angulatus (Percharon), Passalus (Passalus) interstitialis Eschscholtz y P. (Passalus) punctiger lepeletier et Servilla. Un endemismo propio del bosque mesófilo de montaña (1860 - 1900 m de altitud), perteneciente a la tribu Proculini es descrito como Odontotaenius cerasfes sp. nov. Se ilustran estas cuatro especies, incluyendo claves para su identificación y comentarios sobre su zoogeografía.

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3

Jimenez-Ferbans, Larry, Dolores González, and Pedro Reyes-Castillo. "Phylogeny and species delimitation in the group Rhodocanthopus of the genus Passalus (Coleoptera: Passalidae) inferred from morphological and molecular data, with description of two new species." Arthropod Systematics & Phylogeny 74, no. 3 (2016): 255–66. http://dx.doi.org/10.3897/asp.74.e31864.

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The genus Rhodocanthopus Kaup was originally proposed to include five species; after that, more species were added and different criteria were adopted to delimit it, generating great taxonomic confusion. At present, Rhodocanthopus Kaup is considered as a synonym of Passalus and is currently named as the group Rhodocanthopus without formal taxonomic circumscription. To clarify this, phylogenetic analyses (Bayesian inference and parsimony) were performed using morphological and molecular data with genes 12S, 16S and COI. In both analyses, the group Rhodocanthopus resulted monophyletic inside Passalus and included seven previously described species, plus Passalus chocoensis sp.n. and Passalus rufiventris sp.n. Morphologically, the group can be recognized by the presence of secondary internal tubercles over the frontal edge, reduced compound eyes and strong spines on the external edge of the meso- and metatibiae.

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4

Jimenez-Ferbans, Larry, Dolores González, and Pedro Reyes-Castillo. "Phylogeny and species delimitation in the group Rhodocanthopus of the genus Passalus (Coleoptera: Passalidae) inferred from morphological and molecular data, with description of two new species." Arthropod Systematics & Phylogeny 74 (December 8, 2016): 255–66. https://doi.org/10.3897/asp.74.e31864.

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The genus Rhodocanthopus Kaup was originally proposed to include five species; after that, more species were added and different criteria were adopted to delimit it, generating great taxonomic confusion. At present, Rhodocanthopus Kaup is considered as a synonym of Passalus and is currently named as the group Rhodocanthopus without formal taxonomic circumscription. To clarify this, phylogenetic analyses (Bayesian inference and parsimony) were performed using morphological and molecular data with genes 12S, 16S and COI. In both analyses, the group Rhodocanthopus resulted monophyletic inside Passalus and included seven previously described species, plus Passalus chocoensis sp.n. and Passalus rufiventris sp.n. Morphologically, the group can be recognized by the presence of secondary internal tubercles over the frontal edge, reduced compound eyes and strong spines on the external edge of the meso- and metatibiae.

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5

ABREU, Raimunda Liege Souza de, Beatriz RONCHI-TELES, Bazilio Frasco VIANEZ, Claudio Ruy Vasconcelos da FONSECA, Fernando Bernardo Pinto GOUVEIA, and Ediene Borges da SILVA. "Passalid (Insecta: Coleoptera: Passalidae) collected from trunks of Scleronema micranthum (Malvaceae)." Acta Amazonica 47, no. 1 (2017): 71–74. http://dx.doi.org/10.1590/1809-4392201601612.

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ABSTRACT Some beetles can attack the wood immediately after the tree is felled, but there are those that start their attack at different stages of wood degradation. Beetles of the family Passalidae belong to this latest category. The objective of this study was to assess the occurrence of beetles of this family in wood samples taken from trunks of Scleronema micranthum, a forest species from Central Amazon. The samples were exposed to biodegradation for 24 months on the forest ground of the Experimental Station of Tropical Silviculture of the National Institute for Amazonian Research, in Manaus, Amazon State, Brazil. During that period, 15 samples were removed from the experiment, every two months, for insect collection and evaluation of infestation. The presence of six species was recorded, all of them of the Passalini tribe: Passalus (Pertinax) latifrons, P. (Passalus) variiphyllus, P. (Pertinax) convexus, P. (Passalus) interstitialis, P. (Passalus) lanei, and Paxillus leachi. Among these species, P. (Passalus) interstitialis was the most abundant, with 18 individuals. This species was the first one to infest the samples and was found between the eighth and twentieth month of the experiment. The infestation occurred predominantly in the bark and sapwood.

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6

Mattos, Ingrid, and Mermudes José Ricardo Miras. "A new species of Passalus (Passalus) from Atlantic Rainforest, with a key and checklist for the Brazilian Petrejus group (Coleoptera, Passalidae)." Journal of Natural History 52, no. 37-38 (2018): 2351–67. https://doi.org/10.1080/00222933.2018.1536813.

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Mattos, Ingrid, Miras Mermudes, José Ricardo (2018): A new species of Passalus (Passalus) from Atlantic Rainforest, with a key and checklist for the Brazilian Petrejus group (Coleoptera, Passalidae). Journal of Natural History 52 (37-38): 2351-2367, DOI: 10.1080/00222933.2018.1536813, URL: http://dx.doi.org/10.1080/00222933.2018.1536813

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7

Fonseca, Cláudio R. V. "Contribuição ao conhecimento da bionomia de Passalus convexus Dalman, 1817 e Passalus latifrons Percheron, 1841 (Coleoptera: Passalidae)." Acta Amazonica 18, no. 1-2 (1988): 197–222. http://dx.doi.org/10.1590/1809-43921988182222.

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Coleópteros da família Passalidae, com distribuição pantropical, parecem contribuir, pelo menos em parte, para a reciclagem dos nutrientes nas florestas, facilitando a penetração de umidade e de microorganismos decompositores no interior dos troncos mortos, pela abertuda de galerias. Aspectos da bionomia de Passalus convexus Dalm. e Passalus latifrons Perch. Foram estudados durante um ciclo sazonal completo, com levantament dos tipos de troncos atacadio, fauna acompanhante e os estágios de decomposição mais propícios à colonização.

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8

Jiménez-Ferbans, Larry, Ana Maestre-Guerra, Evelin Villalba-Fuentes, Mayelis M. Barros-Barrios, and Jeison Muñoz-Montero. "Passalidae (Coleoptera, Scarabaeoidea) from the Caribbean coast of Colombia: synopsis, key, and new species description." ZooKeys 1179 (September 12, 2023): 243–97. http://dx.doi.org/10.3897/zookeys.1179.104037.

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Bess beetles (Passalidae) are a subsocial family of Coleoptera with approximately 1000 known species of saproxylophagous diet and pantropical distribution, with few extratropical species. Because of their high levels of endemism (especially in mountains), feeding habits, and complex subsociability; Passalidae is considered an excellent biological subject for taxonomic, biogeographical, and evolutionary studies. Colombia is the richest country with more than 118 recorded species of Passalidae, most of the species being related to humid and mountain areas. Colombia’s Caribbean region constitutes the northern portion of the country, extending for more than 130,000 km2 and includes four of the eight biogeographical provinces of Colombia. Since the 2000s this region has been the subject of systematic surveys for Passalidae; as a result, 18 passalid species have been recorded to date. After new explorations and review of entomological collections, the knowledge of the passalid fauna for the region is updated, recording 28 species (8 new records, 2 new species) for which are provided species diagnoses, photographs, and a taxonomic key. The dry plain, characteristic of the lowlands, is dominated by widely distributed species such as Passalus punctiger and Passalus interstitialis, while the mountainous systems provide species of more restricted distributions, some of them endemic to the Colombian Caribbean.

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Jiménez-Ferbans, Larry, Ana Maestre-Guerra, Evelin Villalba-Fuentes, Mayelis M. Barros-Barrios, and Jeison Muñoz-Montero. "Passalidae (Coleoptera, Scarabaeoidea) from the Caribbean coast of Colombia: synopsis, key, and new species description." ZooKeys 1179 (September 12, 2023): 243–97. https://doi.org/10.3897/zookeys.1179.104037.

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Bess beetles (Passalidae) are a subsocial family of Coleoptera with approximately 1000 known species of saproxylophagous diet and pantropical distribution, with few extratropical species. Because of their high levels of endemism (especially in mountains), feeding habits, and complex subsociability; Passalidae is considered an excellent biological subject for taxonomic, biogeographical, and evolutionary studies. Colombia is the richest country with more than 118 recorded species of Passalidae, most of the species being related to humid and mountain areas. Colombia's Caribbean region constitutes the northern portion of the country, extending for more than 130,000 km<sup>2</sup> and includes four of the eight biogeographical provinces of Colombia. Since the 2000s this region has been the subject of systematic surveys for Passalidae; as a result, 18 passalid species have been recorded to date. After new explorations and review of entomological collections, the knowledge of the passalid fauna for the region is updated, recording 28 species (8 new records, 2 new species) for which are provided species diagnoses, photographs, and a taxonomic key. The dry plain, characteristic of the lowlands, is dominated by widely distributed species such as Passalus punctiger and Passalus interstitialis, while the mountainous systems provide species of more restricted distributions, some of them endemic to the Colombian Caribbean.

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10

Jiménez-Ferbans, Larry, Pedro Reyes-Castillo, and Jack C. Schuster. "The Passalidae (Coleoptera, Scarabaeoidea) from Bolivia, with the descriptions of three new species." ZooKeys 882 (October 23, 2019): 51–85. http://dx.doi.org/10.3897/zookeys.882.35532.

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Employing data from literature, examination of specimens in collections, and a field trip, a list of the species of Passalidae from Bolivia is elaborated. A total of 38 species is reported, including new records of Passalus inca Zang, 1905 and P. lunaris (Kaup, 1871), and three new brachypterous species: Passalus bolivianussp. nov., P. canoisp. nov., and P. gonzalezaesp. nov. Most of the species (27) belongs to the Passalini tribe, especially to the genus Passalus Fabricius, 1792 (19 species); the Proculini tribe is represented by eleven species in three genera. The number of species of Bolivia is low and reflects the lack of a systematic exploration of this country; more surveys are needed, especially in ecosystems such as montane forest and tropical rain forest.

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11

Jiménez-Ferbans, Larry, Pedro Reyes-Castillo, and Jack C. Schuster. "The Passalidae (Coleoptera, Scarabaeoidea) from Bolivia, with the descriptions of three new species." ZooKeys 882 (October 23, 2019): 51–85. https://doi.org/10.3897/zookeys.882.35532.

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Employing data from literature, examination of specimens in collections, and a field trip, a list of the species of Passalidae from Bolivia is elaborated. A total of 38 species is reported, including new records of Passalus inca Zang, 1905 and P. lunaris (Kaup, 1871), and three new brachypterous species: Passalus bolivianus sp. nov., P. canoi sp. nov., and P. gonzalezae sp. nov. Most of the species (27) belongs to the Passalini tribe, especially to the genus Passalus Fabricius, 1792 (19 species); the Proculini tribe is represented by eleven species in three genera. The number of species of Bolivia is low and reflects the lack of a systematic exploration of this country; more surveys are needed, especially in ecosystems such as montane forest and tropical rain forest.

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12

Romero Carvalho Mouzinho, José, and Claudio Ruy V. da Fonseca. "CONTRIBUIQÁO AO ESTUDO DA PASSALIDOFAUNA (COLEOPTERA, SCARABAEOIDEA, PASSALIDAE) EM UMA ÁREA DE TERRA FIRME DA AMAZONIA CENTRAL." ACTA ZOOLÓGICA MEXICANA (N.S.), no. 73 (April 14, 1998): 19–44. http://dx.doi.org/10.21829/azm.1998.73731725.

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Durante 13 meses de colectas en el período de octubre de 1992 a octubre de 1993, fué estudiada la fauna da Passalidae en un área de 190 ha de tierra firme en las proximidades del río Solimões, Municipio de Manacapuru, Estado do Amazonas. Fueron colectadas 9 especies, pertenecientes a 4 géneros; Passalus abortivus; P. epiphanoides, P. interruptus, P. glaberrímus, Popilius marginatus, Veturius transversus, V. paraensis, Spasalus crenatus y S. elianae, siendo Passalus abortivus y Passalus epiphanoides las especies más abundantes. Estos coleópteros colonizaban en su mayoría troncos en acentuado estado de decomposíción, derribados en 3 diferentes ambientes: pasto con y sin interferencia da agua y acahual. En un mismo tronco fueron colectadas hasta tres espécies diferentes: P. marginatus, P. epiphanoides e V. transversus, P. abortivas y P. epiphanoides se encontraron a mayores intervalos de distancia del bosque, 420 m y 450 m respectivamente, distribuidas en el área degradada.

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13

Bührnheim, Paulo F., and Nair Otaviano Aguiar. "Passalideos (Coleoptera) da Ilha de Maracá, Roraima." Acta Amazonica 21 (1991): 25–33. http://dx.doi.org/10.1590/1809-43921991211033.

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Foram realizados duas excursões à Ilha de Maracá, Estação Ecológica da Secretaria Especial do Meio Ambiemte, em Roraima, Brasil, uma durante a estação chuvosa, no periodo de 03 a 13.v.1987 e a outra na estação seca de 23 a 30.xi.1987. Na primeira. foram colecionadas quatro espécies de Passalideoes (Coleoptera): PassalusglaberrimusEschsch., 1829; Passalus interruptus(Lin., 1758); Passalus interstitialisEschsch., 1829 e Verres furcilabris (Eschsch., 1829). Na segunda oportunidade, além das espécies, encontradas na primeira, foi colecionada mais uma, Paxillussp. Dados sobre a bionomia destas espéci-es, obtidos, durante os dois colecionamentos, são fornecidos e discutidos.

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Mattos, Ingrid, and Jose Ricardo M. Mermudes. "First survey of the Passalidae (Coleoptera, Scarabaeoidea) species from Reserva Ecológica de Guapiaçu (REGUA), Cachoeiras de Macacu, RJ, Brazil." Check List 12, no. 3 (2016): 1893. http://dx.doi.org/10.15560/12.3.1893.

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We present the details of a survey with species of passalid conducted in the Reserva Ecológica de Guapiaçu (Cachoeiras de Macacu, Rio de Janeiro State) together with illustrations for each species and an identification key. The study includes material collected between May 2010 and October 2013. We identified 11 species in three genera and two tribes (Passalini and Proculini). Passalini comprised two genera, Passalus with six species, and Spasalus with one species, representing 71.42% of all the species encountered. Proculini was represented by only one genus Veturius, with four species, representing 28.57% of the species surveyed. Nine species were recorded for the first time from Cachoeiras de Macacu municipality.

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15

Mattos, Ingrid, and José Ricardo Miras Mermudes. "A new species of Passalus (Passalus) from Atlantic Rainforest, with a key and checklist for the Brazilian Petrejus group (Coleoptera, Passalidae)." Journal of Natural History 52, no. 37-38 (2018): 2351–67. http://dx.doi.org/10.1080/00222933.2018.1536813.

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16

Mattos, Ingrid, and Jose Ricardo Mermudes. "First survey of the Passalidae (Coleoptera, Scarabaeoidea) species from Reserva Ecológica de Guapiaçu (REGUA), Cachoeiras de Macacu, RJ, Brazil." Check List 12, no. (3) (2016): 1–8. https://doi.org/10.15560/12.3.1893.

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We present the details of a survey with species of passalid conducted in the Reserva Ecológica de Guapiaçu (Cachoeiras de Macacu, Rio de Janeiro State) together with illustrations for each species and an identification key. The study includes material collected between May 2010 and October 2013. We identified 11 species in three genera and two tribes (Passalini and Proculini). Passalini comprised two genera, <em>Passalus</em> with six species, and <em>Spasalus</em> with one species, representing 71.42% of all the species encountered. Proculini was represented by only one genus <em>Veturius</em>, with four species, representing 28.57% of the species surveyed. Nine species were recorded for the first time from Cachoeiras de Macacu municipality.

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17

Taboada-Verona, Carlos, and Leidys Murillo-Ramos. "The bess beetles (Coleoptera, Passalidae) of three subregions of the Department of Sucre, Caribbean region of Colombia." Check List 16, no. 6 (2020): 1581–90. http://dx.doi.org/10.15560/16.6.1581.

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We provide species lists and geographical occurrence records of the beetle family Passalidae for three subregions of the department of Sucre, northern Colombia. The sampling localities are lowland environments with typical tropical dry forest vegetation. We selected 15 sampling sites and examined decomposing trunks. We record seven species, four genera, and two tribes of Passalidae. The most abundant species were Passalus punctiger Lepeletier &amp; Serville, 1825, P. interstitialis Eschscholtz, 1829, and P. interruptus (Linnaeus, 1758). We also provide new records for Passalus punctatostriatus Percheron, 1835, Paxillus leachi MacLeay, 1819, and Popilius marginatus (Percheron, 1835) in the department of Sucre. Veturius aspina Kuwert, 1898 was present only in the localities with well-preserved forests. Finally, the species number recorded in this study is low compared to other inventories in Neotropical regions.

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18

Jiménez-Ferbans, Larry, Pedro Reyes-Castillo, Jack C. Schuster, and Cristian Beza-Beza. "The passalid beetles (Coleoptera: Passalidae) from Costa Rica, with the description of two new species of Passalus." Revista Mexicana de Biodiversidad 88, no. 3 (2017): 608–15. http://dx.doi.org/10.1016/j.rmb.2017.07.016.

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19

Waters, James S., Wah-Keat Lee, Mark W. Westneat, and John J. Socha. "Dynamics of tracheal compression in the horned passalus beetle." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 304, no. 8 (2013): R621—R627. http://dx.doi.org/10.1152/ajpregu.00500.2012.

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Rhythmic patterns of compression and reinflation of the thin-walled hollow tubes of the insect tracheal system have been observed in a number of insects. These movements may be important for facilitating the transport and exchange of respiratory gases, but observing and characterizing the dynamics of internal physiological systems within live insects can be challenging due to their size and exoskeleton. Using synchrotron X-ray phase-contrast imaging, we observed dynamical behavior in the tracheal system of the beetle, Odontotaenius disjunctus. Similar to observations of tracheal compression in other insects, specific regions of tracheae in the thorax of O. disjunctus exhibit rhythmic collapse and reinflation. During tracheal compression, the opposing sides of a tracheal tube converge, causing the effective diameter of the tube to decrease. However, a unique characteristic of tracheal compression in this species is that certain tracheae collapse and reinflate with a wavelike motion. In the dorsal cephalic tracheae, compression begins anteriorly and continues until the tube is uniformly flattened; reinflation takes place in the reverse direction, starting with the posterior end of the tube and continuing until the tube is fully reinflated. We report the detailed kinematics of this pattern as well as additional observations that show tracheal compression coordinated with spiracle opening and closing. These findings suggest that tracheal compression may function to drive flow within the body, facilitating internal mixing of respiratory gases and ventilation of distal regions of the tracheal system.

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20

Rodríguez, Jans, and Nayla Rodríguez. "Coynema gen. n., a new genus of nematode (Thelastomatoidea, Hystrignathidae) parasites of Passalidae (Coleoptera) from Cuba." ZooKeys 75 (January 12, 2011): 9–19. https://doi.org/10.3897/zookeys.75.809.

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The new genus <em>Coynema </em><strong>gen. n.</strong> is described as parasite of the two passalid beetles from Cuba: <em>Passalus interstitialis </em>Escholtz, 1829 (type host) and <em>P. pertyi </em>Kaup, 1869. Females are characterized by the shape of their cephalic end, cervical cuticle unarmed, a sub-cylindrical procorpus with its base abruptly dilated, fore region of intestine dilated as a sac-like structure, genital system didelphic-amphidelphic and eggs markedly ovoid and smooth-shelled. Males have a digestive system similar to females, tail sharply pointed, bearing a Y-like thickening of the dorsal cuticle. They also present a big, median, mammiform pre-cloacal papillae and a pair of small, sub-dorsal pre-cloacal papillae anterior to the cuticular thickening of the tail.

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21

Mattos, Ingrid, and José Ricardo M. Mermudes. "Passalidae (Coleoptera: Scarabaeoidea) from Ilha Grande (Angra dos Reis, RJ) with new diagnosis and distributional records in Brazil." Check List 10, no. 2 (2014): 260. http://dx.doi.org/10.15560/10.2.260.

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A survey of the Passalidae species recorded to the Ilha Grande (Angra dos Reis, Rio de Janeiro, Brazil) is presented, with illustrations for each species and a key with diagnosis for genera. Passalus (P.) denticollis Kaup, 1869 and Veturius (V.) transversus Dalman, 1817 was the relative abundance most dominate, representing almost 50% of relative abundance of species in each genus respectively. The study included material collected between January and December of 2008 and it results in 13 species included in four genera and two tribes (Passalini and Proculini). Passalini comprised ten species (Passalus, Spasalus and Paxillus), representing 71.42% of all species. Proculini with three species belong only Veturius, representing 28.57%. Among the 13 species, 12 are registered by first time from Ilha Grande. Veturius (Veturius) sinuatus was the unique species with distribution confirmed and Spasalus cristinae known only São Paulo had the distribution extended to Rio de Janeiro.

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Mattos, Ingrid, and José Mermudes. "Passalidae (Coleoptera: Scarabaeoidea) from Ilha Grande (Angra dos Reis, RJ) with new diagnosis and distributional records in Brazil." Check List 10, no. (2) (2014): 260–68. https://doi.org/10.15560/10.2.260.

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A survey of the Passalidae species recorded to the Ilha Grande (Angra dos Reis, Rio de Janeiro, Brazil) is presented, with illustrations for each species and a key with diagnosis for genera. Passalus (P.) denticollis Kaup, 1869 and Veturius (V.) transversus Dalman, 1817 was the relative abundance most dominate, representing almost 50% of relative abundance of species in each genus respectively. The study included material collected between January and December of 2008 and it results in 13 species included in four genera and two tribes (Passalini and Proculini). Passalini comprised ten species (Passalus, Spasalus and Paxillus), representing 71.42% of all species. Proculini with three species belong only Veturius, representing 28.57%. Among the 13 species, 12 are registered by first time from Ilha Grande. Veturius (Veturius) sinuatus was the unique species with distribution confirmed and Spasalus cristinae known only São Paulo had the distribution extended to Rio de Janeiro.

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23

Taboada-Verona, Carlos, and Leidys Murillo-Ramos. "The bess beetles (Coleoptera, Passalidae) of three subregions of the Department of Sucre, Caribbean region of Colombia." Check List 16, no. (6) (2020): 1581–90. https://doi.org/10.15560/16.6.1581.

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We provide species lists and geographical occurrence records of the beetle family Passalidae for three subregions of the department of Sucre, northern Colombia. The sampling localities are lowland environments with typical tropical dry forest vegetation. We selected 15 sampling sites and examined decomposing trunks. We record seven species, four genera, and two tribes of Passalidae. The most abundant species were <em>Passalus punctiger</em> Lepeletier & Serville, 1825, <em>P. interstitialis</em> Eschscholtz, 1829, and <em>P. interruptus</em> (Linnaeus, 1758). We also provide new records for <em>Passalus punctatostriatus</em> Percheron, 1835, <em>Paxillus leachi</em> MacLeay, 1819, and <em>Popilius marginatus</em> (Percheron, 1835) in the department of Sucre. <em>Veturius aspina</em> Kuwert, 1898 was present only in the localities with well-preserved forests. Finally, the species number recorded in this study is low compared to other inventories in Neotropical regions.

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24

Beza-Beza, Cristian, Larry Jiménez-Ferbans, and McKenna Duane D. "Phylogeny and Systematics of Wood-Degrading Neotropical Bess Beetles (Coleoptera: Passalidae: Passalinae)." Arthropod Systematics & Phylogeny 78 (September 30, 2020): 287–308. https://doi.org/10.26049/ASP78-2-2020-05.

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Passalidae (Coleoptera: Scarabaeoidea) are saproxylophagous beetles that live and feed inside decaying wood. Passalid diversity and biogeography are relatively well-established at the tribal-level, particularly in the New World. However, a robust phylogenetic framework to test the current taxonomic status of the generic groups in the family is lacking. In the New World, Passalidae is represented by the tribes Passalini and Proculini. To test the monophyly of Proculini and Passalini and reconstruct relationships among the New World genera, we used DNA sequences from three genes along with data from 57 morphological characters. Our taxon sampling included 25 of the 26 genera of New World Passalidae across their entire geographic range (The United States of America to Argentina). We recovered Proculini and Passalini as reciprocally monophyletic sister groups. The genus <i>Passalus </i> was rendered polyphyletic by the other four genera of Passalini included in our analyses. The genera of Proculini were mostly monophyletic, except for <i>Odontotaenius</i>, <i>Petrejoides</i>, <i>Popilius,</i> <i>Pseudacanthus</i>, and <i>Vindex.</i> Based on our phylogenetic results and analyses of morphological data, we suggest transferring three species from <i>Petrejoides </i> to <i>Chondrocephalus </i> (<i>Chondrocephalus guatemalae </i> [Reyes-Castillo & Schuster, 1983] <b>comb.n.</b>, <i>Chondrocephalus pokomchii </i> [Schuster, 1981] <b>comb.n.</b>, and <i>Chondrocephalus reyesi </i> [Schuster, 1988] <b>comb.n.</b>), and one species, <i>Pseudoarrox</i> <i>caldasi </i> Reyes-Castillo & Pardo-Locarno, 1995 <b>comb.n.</b>, back from <i>Petrejoides </i> to <i>Pseudoarrox</i> . The genus <i>Passalus</i> and the non-monophyletic genera of Proculini require extensive systematic revision.

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Quednau, F. W. "TWO NEW SPECIES OF TUBERCULATUSsubg. PACIFICALLIS FROM CALIFORNIA (HOMOPTERA: APHIDIDAE)." Canadian Entomologist 124, no. 6 (1992): 1075–83. http://dx.doi.org/10.4039/ent1241075-6.

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AbstractTuberculatus (Pacificallis) passalus sp.nov. and T. (P.) chrysolepidis sp.nov. are described and their relationship with other species of the subgenus Pacificallis is discussed. The status of T. (P.) quercifolii (Davidson) is elucidated. A key for the identification of the species of the subgenus is presented.

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Shattuck, Anna, Carlos Martnez-Mejia, Farran Smith, and Andrew K. Davis. "Observations and Photographs of Eggs of the Horned Passalus Beetle, Odontotaenius disjunctus (Illiger) (Coleoptera: Passalidae)." Coleopterists Bulletin 76, no. 3 (2022): 350–53. https://doi.org/10.1649/0010-065X-76.3.350.

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Shattuck, Anna, Martnez-Mejia, Carlos, Smith, Farran, Davis, Andrew K. (2022): Observations and Photographs of Eggs of the Horned Passalus Beetle, Odontotaenius disjunctus (Illiger) (Coleoptera: Passalidae). The Coleopterists Bulletin 76 (3): 350-353, DOI: 10.1649/0010-065X-76.3.350, URL: http://dx.doi.org/10.1649/0010-065x-76.3.350

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Cox, Devin, and Andrew K. Davis. "Effect of a Parasitic Nematode,Chondronema passaliLeidy (Incertae sedis), on the Size and Strength of the Horned Passalus,Odontotaenius disjunctusIlliger (Coleoptera: Passalidae)." Coleopterists Bulletin 67, no. 2 (2013): 179–85. https://doi.org/10.1649/0010-065X-67.2.179.

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Cox, Devin, Davis, Andrew K. (2013): Effect of a Parasitic Nematode,Chondronema passaliLeidy (Incertae sedis), on the Size and Strength of the Horned Passalus,Odontotaenius disjunctusIlliger (Coleoptera: Passalidae). The Coleopterists Bulletin 67 (2): 179-185, DOI: 10.1649/0010-065X-67.2.179, URL: http://dx.doi.org/10.1649/0010-065x-67.2.179

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Oca, Uriel Garduño-Montes De, Thalia Sarmiento-Ruiz, Jorge Manuel Cardenas-Callirgos, and Alejandro Oceguera-Figueroa. "A new species of Hystrignathus (Nematoda: Thelastomatoidea: Hystrignathidae) associated with the Bess Beetle Passalus Interruptus Linnaeus (Coleoptera: Passalidae) from The Peruvian Amazonia." Zootaxa 5159, no. 3 (2022): 354–66. https://doi.org/10.11646/zootaxa.5159.3.2.

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Oca, Uriel Garduño-Montes De, Sarmiento-Ruiz, Thalia, Cardenas-Callirgos, Jorge Manuel, Oceguera-Figueroa, Alejandro (2022): A new species of Hystrignathus (Nematoda: Thelastomatoidea: Hystrignathidae) associated with the Bess Beetle Passalus Interruptus Linnaeus (Coleoptera: Passalidae) from The Peruvian Amazonia. Zootaxa 5159 (3): 354-366, DOI: 10.11646/zootaxa.5159.3.2

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MORFFE, JANS, NAYLA GARCÍA, BYRON J. ADAMS, and KOICHI HASEGAWA. "Three new species of Longior Travassos & Kloss, 1958 (Nematoda: Thelastomatoidea: Hystrignathidae) parasites of passalid beetles (Coleoptera: Passalidae) from Dominican Republic, Mexico and Colombia." Zootaxa 4877, no. 1 (2020): 125–47. http://dx.doi.org/10.11646/zootaxa.4877.1.5.

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Three new species of the genus Longior Travassos & Kloss, 1958 are described and illustrated, namely L. surieli n. sp. in Antillanax dominicanus (Doesburg, 1953) from the Dominican Republic, L. lamothei n. sp. in Passalus punctiger Le Peletier & Serville, 1825 from Mexico and Colombia and L. zumpimito n. sp. in P. punctatostriatus Percheron, 1835 from Mexico. These constitute the first records of the genus Longior for the aforementioned countries, rising to nine species in the genus. The new species can be differentiated mainly by the length of their body, oesophagus and tail in both sexes, the extension of the lateral alae in the females and the morphology of the cephalic and posterior end in the males. The molecular phylogeny of the new taxa is inferred by the 28S and 18S rDNA and they form a monophyletic clade with other Longior species. The phylogeny of Longior and that of their passalid hosts reveal coevolutionary relationships. These patterns suggest that the phylogeny of Longior species is probably strongly influenced by the evolutionary trajectories of their passalid hosts.

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Bevilaqua, Marcus, and Claudio Ruy Vasconcelos da Fonseca. "Redescription of the species of Passalus Fabricius, 1792 (Coleoptera: Passalidae) described by Walter Douglas Hincks (1906-1961) deposited in the Museum of the University of Manchester." Journal of Natural History 54, no. 5-6 (2020): 321–50. https://doi.org/10.1080/00222933.2020.1759721.

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Bevilaqua, Marcus, Fonseca, Claudio Ruy Vasconcelos da (2020): Redescription of the species of Passalus Fabricius, 1792 (Coleoptera: Passalidae) described by Walter Douglas Hincks (1906-1961) deposited in the Museum of the University of Manchester. Journal of Natural History 54 (5-6): 321-350, DOI: 10.1080/00222933.2020.1759721, URL: http://dx.doi.org/10.1080/00222933.2020.1759721

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Morffe, Jans, Nayla García, Karin Breugelmans, Koichi Hasegawa, and Andrew K. Davis. "Morphological and molecular characterization of Lepidonema magnum Morffe & García, 2010 (Nematoda: Oxyuridomorpha: Hystrignathidae) from Passalus interstitialis Eschscholtz, 1829 (Coleoptera: Passalidae) from Cuba and new locality records for the species." Zootaxa 4551, no. 2 (2019): 221–30. https://doi.org/10.11646/zootaxa.4551.2.6.

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Morffe, Jans, García, Nayla, Breugelmans, Karin, Hasegawa, Koichi, Davis, Andrew K. (2019): Morphological and molecular characterization of Lepidonema magnum Morffe & García, 2010 (Nematoda: Oxyuridomorpha: Hystrignathidae) from Passalus interstitialis Eschscholtz, 1829 (Coleoptera: Passalidae) from Cuba and new locality records for the species. Zootaxa 4551 (2): 221-230, DOI: 10.11646/zootaxa.4551.2.6

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Jiménez-Ferbans, Larry, Pedro Reyes-Castillo, and Marcus Bevilaqua. "The Brachypterous Species of Passalus (Pertinax) (Coleoptera: Passalidae), with the Description of a New Species from Sierra Nevada de Santa Marta, Colombia." Neotropical Entomology 51, no. 5 (2022): 722–41. https://doi.org/10.1007/s13744-022-00988-1.

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Jiménez-Ferbans, Larry, Reyes-Castillo, Pedro, Bevilaqua, Marcus (2022): The Brachypterous Species of Passalus (Pertinax) (Coleoptera: Passalidae), with the Description of a New Species from Sierra Nevada de Santa Marta, Colombia. Neotropical Entomology 51 (5): 722-741, DOI: 10.1007/s13744-022-00988-1, URL: https://doi.org/10.1007/s13744-022-00988-1

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García Rodríguez, Nayla, Luisa Ventosa Zenea, and Jans Morffe Rodríguez. "Nuevas especies de histrignátidos (Thelastomatoidea: Hystrignathidae) de la Sierra del Rosario, Pinar del Río, Cuba." Novitates Caribaea, no. 2 (January 1, 2009): 17–22. http://dx.doi.org/10.33800/nc.v0i2.183.

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Se describen dos nuevas especies de histrignátidos (Thelastomatoidea: Hystrignathidae), parásitas de Passalus interstitialis y P. pertyi (Insecta: Coleoptera), respectivamente, para la Sierra del Rosario, Pinar del Río, Cuba. Otras dos especies, Longior zayasi Coy, García et Álvarez, 1993 y Salesia cubana García et Coy, 1995, se registran por primera vez para esta localidad.

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Lefeuvre, Jake, and Andrew K. Davis. "Effects of the Naturally Occurring Parasitic NematodeChondronema passaliLeidy on Lifting Strength and Captivity-Related Body Mass Patterns in the Horned Passalus Beetle,Odontotaenius disjunctus(Illiger) (Coleoptera: Passalidae)." Coleopterists Bulletin 69, no. 4 (2015): 744–50. https://doi.org/10.1649/0010-065x-69.4.744.

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Lefeuvre, Jake, Davis, Andrew K. (2015): Effects of the Naturally Occurring Parasitic NematodeChondronema passaliLeidy on Lifting Strength and Captivity-Related Body Mass Patterns in the Horned Passalus Beetle,Odontotaenius disjunctus(Illiger) (Coleoptera: Passalidae). The Coleopterists Bulletin 69 (4): 744-750, DOI: 10.1649/0010-065x-69.4.744, URL: http://dx.doi.org/10.1649/0010-065x-69.4.744

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Jimऻnez-Ferbans, Larry, and Pedro Reyes-Castillo. "Phylogeny, biogeography and description of Ameripassalus, a new Mesoamerican genus of Passalidae (Coleoptera)." Invertebrate Systematics 28, no. 2 (2014): 124. http://dx.doi.org/10.1071/is13009.

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Ameripassalus, gen. nov., is described as the first genus of Passalini with a distribution restricted to Mesoamerica. The species include A. guatemalensis (Kaup, 1869), comb. nov. from Passalus Fabricius, A. difficilis, sp. nov. and A. tamaulipensis, sp. nov. from Mexico, and A. jacki, sp. nov. and A. nigritus, sp. nov. from Guatemala. A matrix of 46 morphological characters, including the species from Ameripassalus, gen. nov. and 13 species of the genera Paxillus MacLeay, Ptichopus Kaup, Heliscus Zang, Veturius Kaup, Spasalus Kaup, Passipassalus Fonseca & Reyes-Castillo, Passalus Fabricius and Leptaulax Kaup were analysed. Only a single most parsimonious tree was found; in this Ameripassalus is retrieved as a monophyletic group. Ameripassalus difficilis, sp. nov. is shown as the sister group of the rest of the species in the genus. The species with the southernmost distribution (A. guatemalensis (A. nigritus, sp. nov. + A. jacki, sp. nov.)) form a nested clade within the species with the northernmost distribution. Keys to identify adults of the genera of Passalini and to the species of Ameripassalus are provided.

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Davis, Andrew K. "Lifting Capacity of Horned Passalus Beetles During Passive and Stressed States." Journal of Insect Behavior 27, no. 4 (2014): 496–502. http://dx.doi.org/10.1007/s10905-014-9444-6.

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Bevilaqua, Marcus, and Claudio Ruy Vasconcelos da Fonseca. "Two new species of Passalus Fabricius (Coleoptera: Passalidae) from the western Brazilian Amazon with comments on the taxonomic limits of the subgenera." Papéis Avulsos de Zoologia 60, no. 19 (2020): 1–13. https://doi.org/10.11606/1807-0205/2020.60.special-issue.19.

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Bevilaqua, Marcus, Fonseca, Claudio Ruy Vasconcelos da (2020): Two new species of Passalus Fabricius (Coleoptera: Passalidae) from the western Brazilian Amazon with comments on the taxonomic limits of the subgenera. Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (19): 1-13, DOI: 10.11606/1807-0205/2020.60.special-issue.19, URL: http://dx.doi.org/10.11606/1807-0205/2020.60.special-issue.19

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Davis, Andrew K., and Cody Prouty. "The sicker the better: nematode-infected passalus beetles provide enhanced ecosystem services." Biology Letters 15, no. 5 (2019): 20180842. http://dx.doi.org/10.1098/rsbl.2018.0842.

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There is growing appreciation for the role that parasites have in ecosystems and food webs, though the possibility that they could improve an ecosystem service has never been considered. In forest ecosystems, fallen trees naturally decay over time and slowly return their nutrients to the soil. Beetles in the family Passalidae play a key role by excavating tunnels and consuming wood from these logs, thereby breaking down the wood into smaller debris. In the eastern United States, the horned passalus ( Odontotaenius disjunctus ) is host to a naturally occurring nematode, Chondronema passali , which appears to cause little harm to the beetles. We suspected this was due to compensatory food consumption by parasitized individuals, which we tested here. We collected and housed 113 adult beetles in individual containers with wood for three months, then determined the amount of wood each beetle had processed into fine debris and frass. We then assessed beetles for C. passali and compared wood processing rates between parasitized and non-parasitized groups. Results showed the average daily processing rate of parasitized beetles ( x ¯ = 0.77 g d −1 ) was 15% greater than that of unparasitized ones ( x ¯ = 0.67 g d −1 ). Parasitized beetles were 6% larger, and this may explain some of this pattern, though the effect of parasitism was still significant in our analysis. By extrapolating the daily rates, we estimate that 10 adult beetles without nematodes would break down approximately 2.4 kg of wood in a single year, while a group of 10 parasitized beetles would break down 2.8 kg. While our data are consistent with the idea of compensatory feeding, because these results are based on natural infections, we cannot rule out the possibility that beetles with heightened wood consumption are simply more likely to acquire the parasite. At an ecosystem level, it may not matter which is the case; parasitized beetles provide a more effective ecosystem service.

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Bustamante, Abdhiel, Anahi Oroz, and Erick Yabar. "Lista de los escarabajos passalidae (coleoptera : scarabaeoidea) del Perú." Boletín Científico Centro de Museos Museo de Historia Natural 23, no. 2 (2019): 316–38. http://dx.doi.org/10.17151/bccm.2019.23.2.19.

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La familia Passalidae es un grupo de escarabajos saproxilófagos subsociales de distribución pantropical y que presenta dos tribus en el neotrópico. Son importantes en la reincorporación de materia orgánica en el ciclo de nutrientes y con potencial uso como indicadores ecológicos. Con base en información secundaria y material depositado en la Colección Entomológica de la Universidad Nacional de San Antonio Abad del Cusco, Perú, se elaboró el listado de especies de la familia en el Perú. El registro comprende 61 especies distribuidas en 6 géneros (Passalus Fabricius, Paxillus MacLeay, Spasalus Kaup, Verres Kaup, Popilius Kaup y Veturius Kaup), en las tribus Passalini y Proculini, siendo Passalus (30 spp.) el género más abundante y Veturius (17 spp.) el más ampliamente distribuido; los registros abarcan 12 departamentos del país y nueve provincias biogeográficas en un rango altitudinal que supera los 2600 m. Los registros de la familia en el Perú son menores en comparación con países vecinos en Sur y Centroamerica, principalmente debido a la falta de trabajos de colección y estudios sistemáticos en el grupo, que permitirían conocer la real diversidad de la familia en el país, la cual es probablemente mayor a la conocida actualmente.

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Boucher, Stéphane. "Splitting of the polyphyletic genus Passalus Fabricius, s. auct. I. (Coleoptera, Passalidae)." Bulletin de la Société entomologique de France 120, no. 1 (2015): 113–20. http://dx.doi.org/10.3406/bsef.2015.2217.

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Mattos, Ingrid, José Ricardo Miras Mermudes, and Pedro Reyes-Castillo. "Estructura larval de Passalus gravelyi y dimorfismo sexual en larvas de Passalidae." Revista de Biología Tropical 63, no. 3 (2015): 695. http://dx.doi.org/10.15517/rbt.v63i3.15582.

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<p>Passalidae son insectos subsociales, los adultos y larvas son comunes en bosques tropicales, viven dentro de troncos podridos en un sistema de galerías construido por los adultos. A la fecha, pocos estudios han sido publicados sobre larvas de Passalidae neotropicales. En el presente trabajo, se describe por primera vez la larva de <em>Passalus</em> (<em>Pertinax</em>) <em>gravelyi</em> Moreira, 1922, con base en 10 especímenes: uno de primer estadio, cuatro de segundo estadio y cinco de tercer estadio, asociados con tres adultos de un grupo familiar recolectado en el Parque Nacional de Itatiaia (Río de Janeiro, Brasil). La descripción esta fundamentada en microfotografías electrónicas y digitales de los caracteres diagnósticos que muestran detalles sobre la sistemática de la especie. La larva de <em>Passalus gravelyi </em>muestra el patrón setal general de ‘Pertinax’ y difiere de otras larvas del subgénero <em>Pertinax</em> por tener el anillo anal con 16 a 18 setas, las seis especies de larvas descritas del Brasil tienen en el anillo anal con 10 a 12 setas. Por primera vez se discute la presencia de dimorfismo sexual en larvas de 62 especies de Passalidae, describiendo el <em>ampulla terminal</em> presente en el macho y localizada en el área cuticular media ventral del noveno esternito abdominal. El <em>ampulla terminal</em> es visible ventralmente solo en la larva macho y no es visible en la larva hembra; esta estructura cuticular es común en el macho sobre el noveno esternito abdominal del segundo y tercer estadio larval y no está presente en la larva de primer estadio. El <em>ampulla terminal</em> es conocida en 62 especies agrupadas taxonómicamente en la subfamilia oriental y australiana Aulacocyclinae (Aulacocyclini &amp; Ceracupini) y en la subfamilia cosmotropical Passalinae (Solenocyclini, Macrolinini, Passalini, &amp; Proculini).<strong></strong></p><p> </p>

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Bustamante, Abdhiel, Anahi Oroz, and Erick Yabar. "Lista de los escarabajos Passalidae (Coleoptera: Scarabaeoidea) del Perú." Boletín Científico del Centro de Museos 23, no. 2 (2019): 316–38. https://doi.org/10.17151/bccm.2019.23.2.19.

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The Passalidae family is a group of sub social saproxylophagous beetles of pantropical distribution that present two tribes in the Neotropics. They are important in the reincorporation of organic matter in the nutrient cycle and with potential use as ecological indicators. Based on secondary information and material deposited in the Entomological Collection of Universidad Nacional de San Antonio Abad in Cusco, Peru, the list of species of the family in Peru was made. The record includes 61 species distributed in 6 genera (Passalus Fabricius, Paxillus MacLeay, Spasalus Kaup, Verres Kaup, Popilius Kaup and Veturius Kaup), in the Passalini and Proculini tribes, being Passalus (30 spp.) the most abundant genus and Veturius (17 spp.) the most widely distributed. The records cover 12 departments of the country and 9 biogeographic provinces in an altitudinal range that exceeds 2600 m. The records of the family in Peru are smaller compared to neighboring countries in South and Central America, mainly due to the lack of collection work and systematic studies in the group, which would allow knowing the real diversity of the family in the country, which would allow knowing the real diversity of the family in the country which is probably greater than the diversity currently known. La familia Passalidae es un grupo de escarabajos saproxilófagos subsociales de distribución pantropical y que presenta dos tribus en el neotrópico. Son importantes en la reincorporación de materia orgánica en el ciclo de nutrientes y con potencial uso como indicadores ecológicos. Con base en información secundaria y material depositado en la Colección Entomológica de la Universidad Nacional de San Antonio Abad del Cusco, Perú, se elaboró el listado de especies de la familia en el Perú. El registro comprende 61 especies distribuidas en 6 géneros (Passalus Fabricius, Paxillus MacLeay, Spasalus Kaup, Verres Kaup, Popilius Kaup y Veturius Kaup), en las tribus Passalini y Proculini, siendo Passalus (30 spp.) el género más abundante y Veturius (17 spp.) el más ampliamente distribuido; los registros abarcan 12 departamentos del país y nueve provincias biogeográficas en un rango altitudinal que supera los 2600 m. Los registros de la familia en el Perú son menores en comparación con países vecinos en Sur y Centroamerica, principalmente debido a la falta de trabajos de colección y estudios sistemáticos en el grupo, que permitirían conocer la real diversidad de la familia en el país, la cual es probablemente mayor a la conocida actualmente.

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Rodríguez, Jans, and Nayla Rodríguez. "Hystrignathus dearmasi sp. n. (Oxyurida, Hystrignathidae), first record of a nematode parasitizing a Panamanian Passalidae (Insecta, Coleoptera)." ZooKeys 57 (September 21, 2010): 1–8. https://doi.org/10.3897/zookeys.57.477.

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<em>Hystrignathus dearmasi</em> <strong>sp. n.</strong> (Oxyurida: Hystrignathidae) is described from an unidentified passalid beetle (Coleoptera: Passalidae) from Panama. It resembles <em>Hystrignathus cobbi</em> Travassos & Kloss, 1957 from Brazil, bya similar form of the cephalic end, extension of cervical spines and absence of lateral alae. It differs from the latter species bythe body shorter, the oesophagus and tail comparatively larger, the vulva situated more posterior and the eggs ridged. This species constitutes the first record of a nematode parasitizing a Panamanian passalid.

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Morffe-Rodríguez, Jans, and Nayla García-Rodríguez. "A new species of Artigasia Christie, 1934 (Thelastomatoidea: Hystrignathidae) from Cuba, and redescription of Artigasia simplicitas García et Coy, 1995." Novitates Caribaea, no. 3 (October 1, 2010): 53–61. http://dx.doi.org/10.33800/nc.v0i3.171.

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Se describe una nueva especie de Artigasia Christie, 1934 (Thelastomatoidea: Hystrignathidae) parásita de Passalus pertyi (Coleoptera: Passalidae) de La Habana, Cuba. A. gunnaryae sp. nov. se caracteriza por la presencia de dos anillos cefálicos, espinas desde el final del segundo anillo cefálico hasta el final del cuerpo esofágico, ausencia de alas laterales, flexión distal del ovario muy corta y huevos estriados. Se redescribe y rediagnostica Artigasia simplicitas García et Coy, 1995. Se describe un nuevo morfo de esta especie para la provincia La Habana. Se ofrece una tabla comparativa con las medidas de ambos morfos.

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Davis, Andrew K. "Lonely Beetles Lose Weight: Absence of Conspecific Sounds Negatively Impacts Body Mass in Larval and Adult Passalus Beetles." Stresses 5, no. 1 (2025): 11. https://doi.org/10.3390/stresses5010011.

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For animals that typically live in groups or family units, being isolated from their conspecifics can be stressful. Horned passalus beetles (genus Odontotaenius), inhabit decaying logs in forests in the eastern United States. While not a truly social insect, they do coinhabit logs and maintain family units, and they are known to communicate with each other using stridulations that produce varying types of “chirps”. This project investigated if the auditory environment within these logs affects the beetles, specifically by exposing larval or adult beetles in a lab to sounds of (1) other beetles chirping, (2) no sound, or (3) the sounds of crickets, for varying time periods. Beetles were weighed before and after the exposures to determine changes in body mass. Beetle larvae experienced the slowest growth rates when listening to crickets or no sound, and the highest growth rates when hearing adult chirps. Adult beetles experienced mass losses in the treatments without beetle sounds, and this finding was replicated in three different experiments. The mass loss was greatest in the experiment that had the longest duration. The fact that the mass losses were observed in both the silent treatment, plus the treatment of cricket sounds, indicates that the lack of conspecific sounds (of other passalus beetles) was driving the effect. Surprisingly, there was no added effect of nematode parasitism on adult weight loss. Also, there was no evidence that the beetles were foraging less in the treatments without beetle sound, which suggest those beetles were experiencing elevated metabolism. The reduced growth rates and lost mass are signs that the beetles experienced chronic stress when deprived of the sounds of their kin. Combined, these experiments demonstrate how the acoustic environment, and especially the sounds of other beetles, is important to the lives of these insects, perhaps owing to the fact that they live in dark tunnels.

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Whitaker, Megan, Taylor Procter, and Frank M. Fontanella. "Phylogeography and demographic expansion in the widely distributed horned passalus beetle, Odontotaenius disjunctus (coleoptera: Passalidae)." Mitochondrial DNA Part A 32, no. 3 (2021): 85–97. http://dx.doi.org/10.1080/24701394.2021.1882443.

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Calderon, Lexi, and Andrew K. Davis. "Observations ofSteinernemaNematode and Tachinid Fly Parasites in Horned Passalus Beetles,Odontotaenius disjunctus, from Georgia, U.S.A." Comparative Parasitology 83, no. 2 (2016): 265–68. http://dx.doi.org/10.1654/4807s.1.

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Oh, Hae-Yong, Bora Shin, Yeong-Jun Cho, Kyung-Nam Go, Sung-Soo Kim, and Sei-Woong Choi. "New Record of the Black-based Humming-bird Hawkmoth, Macroglossum passalus (Lepidoptera: Sphingidae) from Korea." Journal of Apiculture 38, no. 2 (2023): 103–6. http://dx.doi.org/10.17519/apiculture.2023.06.38.2.103.

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Davis, Andrew K., Christian Hurd, Christopher Brandon, and David Vasquez. "Walking while Parasitized: Effects of a Naturally-Occurring Nematode on Locomotor Activity of Horned Passalus Beetles." Journal of Insect Behavior 34, no. 3 (2021): 89–95. http://dx.doi.org/10.1007/s10905-021-09769-x.

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Morffe, Jans, and Nayla García. "A new specie of Artigasia Christie, 1934 (Oxyurida: Hystrignathidae) from a Cuban passalid beetle." Papéis Avulsos de Zoologia 50, no. 36 (2010): 571–77. http://dx.doi.org/10.1590/s0031-10492010003600001.

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Abstract:

Artigasia milerai sp. nov. (Oxyurida: Hystrignathidae) is described from the gut caeca of Passalus interstitialis Escholtz, 1829 (Coleoptera: Passalidae) from Escaleras de Jaruco, La Habana province, Cuba (type locality) and El Pan de Matanzas, Matanzas province, Cuba. It differs from A. ensicrinata (Hunt, 1981), A. monodelpha (Travassos & Kloss, 1958) and A. pauliani Théodoridès, 1955 by having ridged eggs and a comparatively shorter tail. It also differs from A. monodelpha and A. pauliani by having a comparatively shorter esophagus, the vulva being slightly more posterior, and the extension of the cervical spines. It is close to A. ankaratrae Van Waerebeke, 1973 but can be differentiated by a stouter body, a comparatively shorter oesophagus and and the extension of the lateral alae.

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