Abstract
In Colombia, the status of the Neotropical genus Pachychernes Beier, 1932 is unknown. The only available data in literature to support the presence of this genus is an adult of P. aff. subrobustus, possibly female, from copal resin without specific locality data, and a record at generic level from Northern Colombia. In this study, we extend the distribution of Pachychernes by describing a new species, P. florezi sp. n. and several reporting individuals of P. zehorum Muchmore, 1997 from Montes de María and the Caribbean coast of the country. These species are clearly differentiated from one another by the sexual dimorphism in the latter species, with a depression on the tarsus I in males. We also present an updated key for all species of the genus.
References
Balzan, L. (1892) Voyage de ME Simon au Venezuela (Décembre 1887–Avril 1888). Arachnides. Chernetes (Pseudoscorpiones). Annales de la Société entomologique de France, 60, 497–552.
Bedoya-Roqueme, E., Filgueiras, R. & Tizo–Pedroso, E. (2020) First record of Pachychernes subrobustus (Balzan, 1892) from the Brazilian Cerrado biome: notes on the biology of the genus and an identification key (Pseudoscorpiones). Revista Ibérica de Aracnología, 37, 253–256.
Beier, M. (1932) Pseudoscorpionidea II. Suborder Cheliferinea. Das Tierreich. Walter de Gruyer & Co., Berlin & Leipzig, 311 pp. https://doi.org/10.1515/9783111385402
Chamberlin, J.C. (1931) Arachnid order Chelonethida. Stanford University Publications, Biological Sciences, 7 (1), 1–284.
Harvey, M. (1992) The phylogeny and classification of the Pseudoscorpionida (Chelicerata: Arachnida). Invertebrate Systematics, 6, 1373–1435. https://doi.org/10.1071/IT9921373
Harvey, M. (2013) Pseudoscorpions of the world. Pseudoscorpions of the World, version 3.0. Western Australian Museum, Perth. Available from: http://www.museum.wa.gov.au/catalogues/pseudoscorpions (accessed 25 February 2021)
Harvey, M.S. & Edward, K.L. (2007) A review of the pseudoscorpion genus Ideoblothrus (Pseudoscorpiones, Syarinidae) from western and northern Australia. Journal of Natural history, 41, 445–472. https://doi.org/10.1080/00222930701219123
Harvey, M.S., Ratnaweera, P.B., Udagama, P.V. & Wijesinghe, M.R. (2012) A new species of the pseudoscorpion genus Megachernes (Pseudoscorpiones: Chernetidae) associated with a threatened Sri Lankan rainforest rodent, with a review of host associations of Megachernes. Journal of Natural history, 46, 2519–2535. https://doi.org/10.1080/00222933.2012.707251
Hoff, C.C. (1946) Descripción de una especie nueva del género Pachychernes Beier, 1932 (Pseudoscorpionida). Ciencia, México, 7, 13–14.
Judson, M. (2010) Redescription of Chelifer eucarpus Dalman (Arachnida, Chelonethi, Withiidae) and first records of pseudoscorpions in copal from Madagascar and Colombia. Palaeodiversity, 3, 33–42.
Judson, M.L. (2007) A new and endangered species of the pseudoscorpion genus Lagynochthonius from a cave in Vietnam, with notes on chelal morphology and the composition of the Tyrannochthoniini (Arachnida, Chelonethi, Chthoniidae). Zootaxa, 1627 (1), 53–68. https://doi.org/10.11646/zootaxa.1627.1.4
Muchmore, W. (1997) An unusual new Pachychernes from Panama and Mexico (Pseudoscorpionida: Chernetidae). Entomological News, 108, 19–23.
Muchmore, W.B. (1990) Pseudoscorpionida. In: Dindal, D.L. (Ed.), Soil Biology Guide. John Wiley and Sons, New York, 503–527.
Romero-Ortiz, C., Garcia, F. & Villarreal, E. (2019) Checklist of the false scorpions (Arachnida: Pseudoscorpiones) of Colombia, with new records and a key to the identification of the families. Zootaxa, 4711, 107–139. https://doi.org/10.11646/zootaxa.4711.1.4
Romero-Ortiz, C. & Harvey, M.S. (2019) The pseudoscorpion genus Verrucachernes (Pseudoscorpiones: Chernetidae) in the Indian region. Zootaxa, 4568 (2), 337–346. https://doi.org/10.11646/zootaxa.4568.2.8
Tooren, D. van den (2008) New Neotropical pseudoscorpions (Pseudoscorpiones) from Aruba, Trinidad and Saba (Lesser Antilles), with some new localities of pseudoscorpions from Aruba and Bonaire. Zoologische Mededelingen, 82, 423–440.
Villegas-Guzmán, G. & Perez, T. (2007) A new species of Pachychernes (Pseudoscorpiones, Chernetidae) from México associated with nests of Neotoma micropus (Rodentia, Muridae). Journal of Arachnology, 34, 578–585. https://doi.org/10.1636/05-31.1
Villarreal, E., Martínez, N. & Ortiz, C.R. (2019) Diversity of Pseudoscorpiones (Arthropoda: Arachnida) in two fragments of dry tropical forest in the colombian Caribbean region. Caldasia, 41, 139–151. https://doi.org/10.15446/caldasia.v41n1.72189