Abstract
Charinus is the most speciose genus of the Charontidae, with the highest number of species in Brazil (43 spp). Almost half of these species are known to inhabit caves, a fragile ecosystem that is little known and is highly threatened by human activities. Eleven of the Brazilian species of Charinus occur only inside caves (troglobionts) being, therefore, an important component of cave ecosystems acting as one of the major cave predators. Here, we discuss conservation priorities and concerns for caves in northeastern Brazil, describe for the first time the female of Charinus santanensis and characterize the species hydrophobic coating and its crystals, a likely important protection for hot and humid environments, presenting comparison with its congeners.
References
- Baker, C.M., Ballesteros, J.A., Aharon, S., Gainett, G., Armiach Steinpress, I., Wizen, G., Sharma, P.P. & Gavish-Regev, E. (2022) Recent speciation and phenotypic plasticity within a parthenogenetic lineage of levantine whip spiders (Chelicerata: Amblypygi: Charinidae). Molecular Phylogenetics and Evolution, 175, 1–8. https://doi.org/10.1016/J.YMPEV.2022.107560
- Baptista, R.L.C. & Giupponi, A.P. de L. (2002) A new troglomorphic Charinus from Brazil (Arachnida: Amblypygi: Charinidae). Revista Ibérica de Aracnología, 6 (31), 105–110. [http://entomologia.rediris.es/gia]
- Bichuette, M.E., Simões, L.B., Von Schimonsky, D.M. & Gallão, J.E. (2015) Effectiveness of quadrat sampling on terrestrial cave fauna survey - A case study in a Neotropical cave. Acta Scientiarum - Biological Sciences, 37 (3), 345–351. https://doi.org/10.4025/actascibiolsci.v37i3.28374
- CANIE. (2025) Cadastro Nacional de Informações Espeleológicas - CANIE. Instituto Chico Mendes de Conservação da Biodiversidade. Praque Nacional de Brasília, Brasília. Available from: https://canie2.sisicmbio.icmbio.gov.br (accessed 2 July 2025)
- Chirivi-Joya, D., Bonilla, L., Galindo, A. & Fagua, G. (2021) Variation of cleaning organ structures and setae of pedipalp tarsus in the family Phrynidae (Arachnida: Amblypygi). Arthropod Structure & Development, 61, 101027, 1–13. https://doi.org/10.1016/j.asd.2021.101027
- de Armas, L.F. & Cubas-Rodríguez, A.M. (2024) The poorly-known amblypygid fauna (Arachnida, Amblypygi) of Honduras, Central America: an overview. Neotropical Biology and Conservation, 19 (2), 137–148. https://doi.org/10.3897/neotropical.19.e113507
- De Leão Giupponi, A.P. & De Miranda, G.S. (2016) Eight new Species of Charinus Simon, 1892 (Arachnida: Amblypygi: Charinidae) endemic for the Brazilian Amazon, with notes on their conservational status. PLoS ONE, 11 (2), 1–33. https://doi.org/10.1371/journal.pone.0148277
- De Miranda, G.S., Giupponi, A.P.L., Scharff, N. & Prendini, L. (2022) Phylogeny and biogeography of the pantropical whip spider family Charinidae (Arachnida: Amblypygi). Zoological Journal of the Linnean Society, 194 (1), 136–180. https://doi.org/10.1093/ZOOLINNEAN/ZLAA101
- De Miranda, G.S., P.L. Giupponi, A., Prendini, L. & Scharff, N. (2021) Systematic revision of the pantropical whip spider family Charinidae Quintero, 1986 (Arachnida, Amblypygi). European Journal of Taxonomy, 772, 1–409. https://doi.org/10.5852/ejt.2021.772.1505
- De Souza, P.E., da Silva Brandão Gonçalves, B., Souza-Silva, M. & Ferreira, R.L. (2024) We prefer night-time, they prefer daytime: Biological rhythm variability in cave-dwelling whip spiders (Amblypygi: Charontidae) in the Neotropics. Journal of Zoology, 324 (4), 310–324. https://doi.org/10.1111/JZO.13223
- Ferreira, R.L., Prous, X., Bernardi, L.F.O. & Souza Silva, M. (2010) Fauna subterrânea do estado do Rio Grande do Norte : Caracterização e impactos. Revista Brasileira de Espeleologia, 1 (1), 25–51.
- Filippov, A., Wolff, J.O., Seiter, M. & Gorb, S.N. (2017) Numerical simulation of colloidal self-assembly of super-hydrophobic arachnid cerotegument structures. Journal of Theoretical Biology, 430, 1–8. https://doi.org/10.1016/j.jtbi.2017.07.001
- Giupponi, A.P. de L. & de Miranda, G.S. (2016) Eight New Species of Charinus Simon, 1892 (Arachnida: Amblypygi: Charinidae) Endemic for the Brazilian Amazon, with Notes on Their Conservational Status. PLOS ONE, 11 (2), 1–33. https://doi.org/10.1371/journal.pone.0148277
- Hebets, E. & Chapman, R. (2000) Electrophysiological studies of olfaction in the whip spider Phrynus parvulus (Arachnida, Amblypygi). Journal of Insect Physiology, 46 (11), 1441–1448. https://doi.org/10.1016/s0022-1910(00)00068-8
- ICMBio. (2025) Sistema de Avaliação do Risco de Extinção da Biodiversidade – SALVE. Available from: https://salve.icmbio.gov.br/ (accessed 2 June 2025)
- IUCN (2012) IUCN Red List Categories and Criteria. Version 3.1. 2nd Edition The IUCN Red List of Threatened SpeciesTM. IUCN, Gland. Available from: https://iucn.org/resources/publication/iucn-red-list-categories-and-criteria-version-31 (accessed 15 September 2025)
- Mammola, S., Piano, E., Cardoso, P., Vernon, P., Domínguez-Villar, D., Culver, D.C., Pipan, T. & Isaia, M. (2019) Climate change going deep: The effects of global climatic alterations on cave ecosystems. The Anthropocene Review, 6 (1–2), 98–116. https://doi.org/10.1177/2053019619851594
- Ministério do Meio Ambiente (2000) Convenção sobre Diversidade Biológica - CDB. Available from: https://www.gov.br/mma/pt-br/textoconvenoportugus.pdf (accessed 15 September 2025)
- Ministério do Meio Ambiente (2017) Instrução Normativa No - 2, de 30 de Agosto de 2017. Diário Oficial Da União, 169 (I), 161–165.
- Pinto-Da-Rocha, R., Machado, G. & Weygoldt, P. (2002) Two new species of Charinus Simon, 1892 from Brazil with biological notes (Arachnida; Amblypygi; Charinidae). Journal of Natural History, 36 (1), 107–118. https://doi.org/10.1080/00222930110110152
- Prendini, L., Weygoldt, P. & Wheeler, W.C. (2005) Systematics of the group of African whip spiders (Chelicerata: Amblypygi): Evidence from behaviour, morphology and DNA. Organisms Diversity & Evolution, 5 (3), 203–236. https://doi.org/10.1016/j.ode.2004.12.004
- QGIS Development Team. (2025) QGIS Geographic Information System. Open Source Geospatial Foundation Project. Available from: http://www.qgis.org/ (accessed 15 September 2025)
- Rahmadi, C., Harvey, M.S. & Kojima, J.-I. (2010) Whip spiders of the genus Sarax Simon 1892 (Amblypygi: Charinidae) from Borneo Island. Zootaxa, 2612 (1), 1–21. https://doi.org/10.11646/zootaxa.2612.1.1
- Rahmadi, C. & Kojima, J. (2010) Whip spiders of the genus Sarax in the Papuan region, with description of two new species. Journal of Arachnology, 38, 475–484. https://doi.org/10.1636/Ha09-95.1
- Réveillion, F., Montuire, S., Maquart, P.O., Fétiveau, C. & Bollache, L. (2022) Variations in the carapace shape of whip spiders (Arachnida: Amblypygi). Journal of Morphology, 283 (8), 1003–1014. https://doi.org/10.1002/JMOR.21485
- Seiter, M., Lemell, P., Gredler, R. & Wolff, J.O. (2019) Strike kinematics in the whip spider Charon sp. (Amblypygi: Charontidae). The Journal of Arachnology, 47 (2), 260. https://doi.org/10.1636/joa-s-18-089
- Seiter, M., Schwaha, T., Ferreira, R.L., Prendini, L. & Wolff, J.O. (2021) Fine structure of the epicuticular secretion coat and associated glands of Pedipalpi and Palpigradi (Arachnida). Journal of Morphology, 282 (8), 1158–1169. https://doi.org/10.1002/JMOR.21360
- Seiter, M., Schwaha, T., Prendini, L., Gorb, S.N. & Wolff, J.O. (2022) Cerotegument microstructure of whip spiders (Amblypygi: Euamblypygi Weygoldt, 1996) reveals characters for systematics from family to species level. Journal of Morphology, 283 (4), 428–445. https://doi.org/10.1002/JMOR.21452
- Vasconcelos, A.C.O. & Ferreira, R.L. (2016) Description of two new species of Charinus Simon, 1892 from Brazilian caves with remarks on conservation (Arachnida: Amblypygi: Charinidae). Zootaxa, 4072 (2), 185–202. https://doi.org/10.11646/zootaxa.4072.2.3
- Vasconcelos, A.C.O. & Ferreira, R.L. (2017) Two new species of cave-dwelling Charinus Simon, 1892 from Brazil (Arachnida: Amblypygi: Charinidae). Zootaxa, 4312 (2), 277–292. https://doi.org/10.11646/zootaxa.4312.2.4
- Vidal, V.C.R., Carvalho Filho, F.da S. & Silva de Miranda, G. (2021) Amblypygi parthenogenesis, embryonic and post-embryonic development: a case study with the Amazonian species Charinus guto Giupponi and de Miranda, 2016 (Amblypygi: Charinidae). Journal of Natural History, 55 (17–18), 1113–1129. https://doi.org/10.1080/00222933.2021.1936678
- Willemart, R.H., Farine, J.P., Peretti, A.V. & Gnaspini, P. (2006) Behavioral roles of the sexually dimorphic structures in the male harvestman, Phalangium opilio (Opiliones, Phalangiidae). Canadian Journal of Zoology, 84 (12), 1763–1774. https://doi.org/10.1139/Z06-173
- Wolff, J.O., Schwaha, T., Seiter, M. & Gorb, S.N. (2016) Whip spiders (Amblypygi) become water-repellent by a colloidal secretion that self-assembles into hierarchical microstructures. Zoological Letters, 2 (1), 1–10. https://doi.org/10.1186/s40851-016-0059-y
- Wolff, J.O., Seiter, M. & Gorb, S.N. (2017) The water-repellent cerotegument of whip-spiders (Arachnida: Amblypygi). Arthropod Structure & Development, 46 (1), 116–129. https://doi.org/10.1016/J.ASD.2016.10.010
- World Amblypygi Catalog. (2025) World Amblypygi Catalog. Natural History Museum Bern, online at. Available from: https://wac.nmbe.ch/ (accessed 11 February 2025)
- Zampaulo, R. de A. & Prous, X. (2022) Fauna Cavernícola do Brasil. Editora Rupestre, Belo Horizonte, 587 pp.