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Journal articles on the topic 'Calamistrum'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Joel, Anna-Christin, Ingo Scholz, Linda Orth, Peter Kappel, and Werner Baumgartner. "Morphological adaptation of the calamistrum to the cribellate spinning process in Deinopoidae (Uloboridae, Deinopidae)." Royal Society Open Science 3, no. 2 (2016): 150617. http://dx.doi.org/10.1098/rsos.150617.

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Spiders are famous for their silk with fascinating mechanical properties. However, some can further produce, process and handle nano fibres, which are used as capture threads. These ‘cribellate spiders’ bear a specialized setae comb on their metatarsus (calamistrum), which modifies cribellate nano fibres to assemble a puffy structure within the capture thread. Among different species, the calamistrum morphology can differ remarkably. Although a model of thread production has been established for Uloborus plumipes , it is not resolved if/how different shaped calamistra influence the production

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2

Heiss, Alexander, Daesung Park, and Anna-Christin Joel. "The Calamistrum of the Feather-Legged Spider Uloborus plumipes Investigated by Focused Ion Beam and Scanning Electron Microscopy (FIB–SEM) Tomography." Microscopy and Microanalysis 24, no. 2 (2018): 139–46. http://dx.doi.org/10.1017/s1431927618000132.

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AbstractSpiders are natural specialists in fiber processing. In particular, cribellate spiders manifest this ability as they produce a wool of nanofibers to capture prey. During its production they deploy a sophisticated movement of their spinnerets to darn in the fibers as well as a comb-like row of setae, termed calamistrum, on the metatarsus which plays a key role in nanofiber processing. In comparison to the elaborate nanofiber extraction and handling process by the spider’s calamistrum, the human endeavors of spinning and handling of artificial nanofibers is still a primitive technical pr

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3

Meyer, Marco, Gerda Buchberger, Johannes Heitz, Dariya Baiko, and Anna-Christin Joel. "Ambient Climate Influences Anti-Adhesion between Biomimetic Structured Foil and Nanofibers." Nanomaterials 11, no. 12 (2021): 3222. http://dx.doi.org/10.3390/nano11123222.

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Due to their uniquely high surface-to-volume ratio, nanofibers are a desired material for various technical applications. However, this surface-to-volume ratio also makes processing difficult as van der Waals forces cause nanofibers to adhere to virtually any surface. The cribellate spider Uloborus plumipes represents a biomimetic paragon for this problem: these spiders integrate thousands of nanofibers into their adhesive capture threads. A comb on their hindmost legs, termed calamistrum, enables the spiders to process the nanofibers without adhering to them. This anti-adhesion is due to a ri

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4

Marusik, Y. M., and A. Zamani. "A New Species of Sahastata (Aranei, Filistatidae) from Southern Iran." Vestnik Zoologii 50, no. 3 (2016): 267–70. http://dx.doi.org/10.1515/vzoo-2016-0031.

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Abstract Sahastata amethystina sp. n. is described based on the holotype female from Kerman Province, Iran. The new species is easily differentiated from other congeners by the bright violet carapace in live specimens as well as by shape of the calamistrum and endogyne.

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5

Paun, Irina Alexandra, Bogdan Stefanita Calin, Roxana Cristina Popescu, Eugenia Tanasa, and Antoniu Moldovan. "Laser Direct Writing of Dual-Scale 3D Structures for Cell Repelling at High Cellular Density." International Journal of Molecular Sciences 23, no. 6 (2022): 3247. http://dx.doi.org/10.3390/ijms23063247.

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The fabrication of complex, reproducible, and accurate micro-and nanostructured interfaces that impede the interaction between material’s surface and different cell types represents an important objective in the development of medical devices. This can be achieved by topographical means such as dual-scale structures, mainly represented by microstructures with surface nanopatterning. Fabrication via laser irradiation of materials seems promising. However, laser-assisted fabrication of dual-scale structures, i.e., ripples relies on stochastic processes deriving from laser–matter interaction, lim

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6

POLOTOW, DANIELE, and CHARLES GRISWOLD. "Chinja, a new genus of spider from the Eastern Arc Mountains of Tanzania (Araneae, Zoropsidae)." Zootaxa 4472, no. 3 (2018): 545. http://dx.doi.org/10.11646/zootaxa.4472.3.7.

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The new zoropsid spider genus Chinja Polotow & Griswold is diagnosed and described and the following two new species are described: C. chinja sp. nov. and C. scharffi sp. nov. The species were collected in the Eastern Arc Mountains of Tanzania and appear to be endemic to this region. The genus belongs to the oval-calamistrum clade (OC Clade), which also includes Dionycha and Lycosoidea. Based on the synapomorphies and diagnostic characters of members of the OC Clade, Chinja is considered a member of Zoropsidae, although without a clear subfamily placement due to insufficient data. Males of

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7

Hajer, Jaromír, Lenka Foberová, and Dana Řeháková. "Silk-producing organs of ecribellate and cribellate nymphal stages in Austrochilus sp. (Araneae: Austrochilidae): Notes on the transformation of the anterior median spinnerets into the cribellum." Israel Journal of Entomology 47 (July 24, 2017): 21–33. https://doi.org/10.5281/zenodo.834179.

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During its life cycle, the cribellate spider <em>Austrochilus</em> sp. passes through the ecribellate nymphal, or spiderling stage (= the first instar, after leaving the egg sac), which has three pairs of spinnerets. According to the position and distribution of spigots on the spinnerets, these spigots are assumed to be connected to <em>glandulae ampullaceae major</em>, <em>glandulae ampullaceae minor</em>, <em>glandulae piriformes</em> and <em>glandulae aciniformes</em>. Such a spinning apparatus allows spiderlings to make draglines, attachment discs and silk for the molting platform. The

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8

Opell, Brent D. "CRIBELLUM AND CALAMISTRUM ONTOGENY IN THE SPIDER FAMILY ULOBORIDAE: LINKING FUNCTIONALLY RELATED BUT SEPARATE SILK SPINNING FEATURES." Journal of Arachnology 29, no. 2 (2001): 220–26. http://dx.doi.org/10.1636/0161-8202(2001)029[0220:cacoit]2.0.co;2.

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9

Heitz, Johannes, Gerda Buchberger, Werner Baumgartner, et al. "Change of Adhesion Properties of Bioinspired Laser-Induced Periodic Nanostructures towards Cribellate Spider Nanofiber Threads by Means of Thin Coatings." Coatings 14, no. 7 (2024): 790. http://dx.doi.org/10.3390/coatings14070790.

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We investigated the effect of additional continuous functional coatings, which changed the hydrophilic–hydrophobic properties of the surface without heavily influencing the surface topography at the nanoscale, on the antiadhesive properties of bioinspired laser-induced periodic nanostructures. These nanostructures mimic the antiadhesive structures on the silk-combing area on the legs of cribellate spiders, the calamistrum. The thin films were deposited by matrix-assisted laser deposition and characterized by infrared spectroscopy, X-ray photoelectron spectroscopy, water contact angle measureme

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10

Polotow, Daniele, Anthea Carmichael, and Charles E. Griswold. "Total evidence analysis of the phylogenetic relationships of Lycosoidea spiders (Araneae, Entelegynae)." Invertebrate Systematics 29, no. 2 (2015): 124. http://dx.doi.org/10.1071/is14041.

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Phylogenetic relationships within the superfamily Lycosoidea are investigated through the coding and analysis of character data derived from morphology, behaviour and DNA sequences. In total, 61 terminal taxa were studied, representing most of the major groups of the RTA-clade (i.e. spiders that have a retrolateral tibial apophysis on the male palp). Parsimony and model-based approaches were used, and several support values, partitions and implied weighting schemes were explored to assess clade stability. The morphological–behavioural matrix comprised 96 characters, and four gene fragments wer

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11

LEDFORD, JOEL M., and CHARLES E. GRISWOLD. "A study of the subfamily Archoleptonetinae (Araneae, Leptonetidae) with a review of the morphology and relationships for the Leptonetidae." Zootaxa 2391, no. 1 (2010): 1. http://dx.doi.org/10.11646/zootaxa.2391.1.1.

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Detailed examination of the spinning organs and legs of Archoleptoneta schusteri Gertsch (1974) has revealed a cribellum and calamistrum, which represents the discovery of the first cribellate member of the Leptonetidae. Subsequent examination of all other described Archoleptoneta species has confirmed the presence of a rectangular colulus similar to other leptonetids. A comparative review of the characters used to support the Leptonetidae is presented, including a discussion of their phylogenetic implications. The distribution of several features of the spinning organs, respiratory system, an

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12

Lifka, Sebastian, Kristóf Harsányi, Erich Baumgartner, et al. "Laser-processed antiadhesive bionic combs for handling nanofibers inspired by nanostructures on the legs of cribellate spiders." Beilstein Journal of Nanotechnology 13 (November 7, 2022): 1268–83. http://dx.doi.org/10.3762/bjnano.13.105.

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Nanofibers are drawing the attention of engineers and scientists because their large surface-to-volume ratio is favorable for applications in medicine, filter technology, textile industry, lithium-air batteries, and optical sensors. However, when transferring nanofibers to a technical product in the form of a random network of fibers, referred to as nonwoven fabric, the stickiness of the freshly produced and thus fragile nanofiber nonwoven remains a problem. This is mainly because nanofibers strongly adhere to any surface because of van der Waals forces. In nature, there are animals that are a

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13

Esteve-Raventós, Fernando, Ellen Larsson, Fermín Pancorbo, et al. "A Taxonomic and Phylogenetic Contribution on Inosperma Section Inosperma (Agaricales, Inocybaceae) in Europe: Calamistratum and Geraniodorum Groups." Journal of Fungi 10, no. 6 (2024): 374. http://dx.doi.org/10.3390/jof10060374.

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The aim of this study is to carry out a taxonomic revision of the groups Calamistratum and Geraniodorum of the genus Inosperma sect. Inosperma in Europe. For this purpose, a multigenic phylogenetic analysis was carried out using the ITS, LSU, RPB1 and RPB2 markers, covering a total of 111 sequences, including those generated from the existing type-material collections. This analysis led to the recognition of nine clades or terminal groups for the European continent, correlating with nine morphological species. Three of them, I. calamistratum, I. neohirsutum sp. nov. and I. turietoense sp. nov.

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14

Opell, Brent D., Jamel S. Sandidge, and Jason E. Bond. "EXPLORING FUNCTIONAL ASSOCIATIONS BETWEEN SPIDER CRIBELLA AND CALAMISTRA." Journal of Arachnology 28, no. 1 (2000): 43–48. http://dx.doi.org/10.1636/0161-8202(2000)028[0043:efabsc]2.0.co;2.

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15

Anyinkeng, Neculina, Mathias Afui Mih, and Aaron Suh Tening. "Diversity and abundance of macrophytes of streams under different anthropogenic influences in the Buea municipality, southwestern Cameroon." World Journal of Advanced Research and Reviews 5, no. 1 (2020): 001–15. https://doi.org/10.5281/zenodo.4310537.

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Macrophytes can occur as submerged, floating or emergent. They provide not only important structural supports in streams and river habitats, but also absorb and sequester pollutants, provide primary food production, nutrients and habitats to a wide range of macro and micro-organisms living in and around lotic sites. Their existence is however threatened by both anthropogenic and natural stresses. This study aimed to document macrophyte diversity and abundance in streams under different anthropogenic influences in Buea, southwestern Cameroon. Floristic surveys were carried out using 500 m long

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16

Plamadeala, Cristina, Sebastian Lifka, Gerda Buchberger, Werner Baumgartner, and Johannes Heitz. "Bio-inspired hierarchical polymer micro- and nanostructures for anti-adhesion applications." Frontiers in Materials 10 (November 22, 2023). http://dx.doi.org/10.3389/fmats.2023.1281992.

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In this paper we present polymer surfaces inspired by the calamistrum of cribellate spiders. The calamistrum resembles a micro-comb with a finger-print-like nanorippled topography, which allows cribellate spiders to handle and process nanofibers, without sticking to them. Due to its morphology, the calamistrum has a reduced surface for contact with the nanofibers, which therefore reduces the adhesive forces. Three different types of structured surfaces were prepared: nanostructured surfaces (ripples), microstructured surfaces (lines), and a combination of micro- and nanostructured surfaces (li

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17

Meyer, Marco, Gerda Buchberger, Johannes Heitz, Dariya Baiko, and Anna-Christin Joel. "Ambient Climate Influences Anti-Adhesion between Biomimetic Structured Foil and Nanofibers." November 27, 2021. https://doi.org/10.3390/nano11123222.

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This is a publication about the influence of temperature and humidity onto the antiadhesive properties between cribellate threads of <em>Uloborus plumipes</em> and LIPSS structured PET foils, mimicking the ripple structure found on the calamistrum of this species. Published in Nanomaterials 2021, 11(12), 3222; doi: 10.3990/nano11123222

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18

Lifka, Sebastian, Christoph Stecher, Marco Meyer, Anna-Christin Joel, Johannes Heitz, and Werner Baumgartner. "Biomimetic, antiadhesive surface structure inspired by the calamistra setae of cribellate spiders for electrospun nanofiber handling." Frontiers in Ecology and Evolution 11 (March 8, 2023). http://dx.doi.org/10.3389/fevo.2023.1099355.

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IntroductionDue to their excellent surface-to-volume ratio, nanofibers (i.e., fibers with a diameter of approximately 10 to 800 nm) are of increasing interest to engineers and scientists in a broad spectrum of applications. However, due to van der Waals forces, these nanofibers tend to adhere strongly to any surface, which makes further processing very challenging. In nature, we find animals that can easily handle nanofibers: Cribellate spiders use a comb-like structure, the so-called calamistrum, to produce, handle, and process nanofibers. Due to a fingerprint-like surface nanostructure, nano

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19

Paun, Irina, Bogdan Calin, Roxana Cristina Popescu, Eugenia Tanasa, and Antoniu Moldovan. "Laser Direct Writing of Dual-Scale 3D Structures for Cell Repelling at High Cellular Density." March 17, 2022. https://doi.org/10.3390/ijms23063247.

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The fabrication of complex, reproducible, and accurate micro-and nanostructured interfaces that impede the interaction between material’s surface and different cell types represents an important objective in the development of medical devices. This can be achieved by topographical means such as dual-scale structures, mainly represented by microstructures with surface nanopatterning. Fabrication via laser irradiation of materials seems promising. However, laser-assisted fabrication of dual-scale structures, i.e., ripples relies on stochastic processes deriving from laser–matter inte

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20

Li, Min, Min Liu, Shi-Yun Hu, Fang-Zhen Luo, and Ming-Long Yuan. "Comparative mitogenomic analyses provide evolutionary insights into the retrolateral tibial apophysis clade (Araneae: Entelegynae)." Frontiers in Genetics 13 (September 14, 2022). http://dx.doi.org/10.3389/fgene.2022.974084.

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The retrolateral tibial apophysis (RTA) clade is the largest spider lineage within Araneae. To better understand the diversity and evolution, we newly determined mitogenomes of ten RTA species from six families and performed a comparative mitogenomics analysis by combining them with 40 sequenced RTA mitogenomes available on GenBank. The ten mitogenomes encoded 37 typical mitochondrial genes and included a large non-coding region (putative control region). Nucleotide composition and codon usage were well conserved within the RTA clade, whereas diversity in sequence length and structural feature

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21

Buchberger, Gerda, Marco Meyer, Cristina Plamadeala, et al. "Robustness of antiadhesion between nanofibers and surfaces covered with nanoripples of varying spatial period." Frontiers in Ecology and Evolution 11 (June 19, 2023). http://dx.doi.org/10.3389/fevo.2023.1149051.

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Since nanofibers have a high surface-to-volume ratio, van der Waals forces render them attracted to virtually any surface. The high ratio provides significant advantages for applications in drug delivery, wound healing, tissue regeneration, and filtration. Cribellate spiders integrate thousands of nanofibers into their capture threads as an adhesive to immobilize their prey. These spiders have antiadhesive nanoripples on the calamistrum, a comb-like structure on their hindmost legs, and are thus an ideal model for investigating how nanofiber adhesion can be reduced. We found that these nanorip

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22

"Crinum calamistratum." CABI Compendium CABI Compendium (January 7, 2022). http://dx.doi.org/10.1079/cabicompendium.113604.

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23

Sun, Yan, Seung-Min Lee, Bon-Jin Ku, Eun-Ah Park, and Myung-Jin Moon. "Capture silk scaffold production in the cribellar web spider." Applied Microscopy 51, no. 1 (2021). http://dx.doi.org/10.1186/s42649-021-00061-y.

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AbstractSpider capture silk is a natural scaffolding material that outperforms most synthetic materials in terms of its combination of strength and elasticity. Among the various kinds of silk threads, cribellar thread is the most primitive prey-capturing type of spider web material. We analyzed the functional organization of the sieve-like cribellum spigots and specialized calamistral comb bristles for capture thread production by the titanoecid spider Nurscia albofasciata. The outer cribellar surface is covered with thousands of tiny spigots, and the cribellar plate produces non-sticky thread

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