Aquatic beetle diversity from Volcan Tacana, Mexico: altitudinal distribution pattern and biogeographical affinity of the fauna Author Luna-Luna, Alba Magali Doctorado en Ciencias Biologicas y de la Salud, Universidad Autonoma Metropolitana, Mexico City, Mexico Author Martins, Caleb Califre https://orcid.org/0000-0001-5630-9865 Postdoctoral fellow, Instituto de Biologia, Departamento de Zoologia, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico Author Lopez-Perez, Andres Postdoctoral fellow, Instituto de Biologia, Departamento de Zoologia, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico Author Ramirez-Ponce, Andres https://orcid.org/0000-0003-4742-7397 Laboratorio de Ecosistemas Costeros, Departamento de Hidrobiologia, Universidad Autonoma Metropolitana-Iztapalapa, Mexico City, Mexico Author Contreras-Ramos, Atilano https://orcid.org/0000-0001-8044-1348 Red de Biodiversidad y Sistematica, Instituto de Ecologia, A. C., Xalapa, Veracruz, Mexico acontreras@ib.unam.mx text ZooKeys 2022 2022-07-11 1111 301 338 http://dx.doi.org/10.3897/zookeys.1111.68665 journal article http://dx.doi.org/10.3897/zookeys.1111.68665 1313-2970-1111-301 8EDF5CD7B0104B6DB90F0A6A1200C768 B17D24BEF89E503B813D064FB1E7AA5C Xenelmis bufo (Sharp, 1882) Distribution. Mexico (Chiapas, Colima, Guerrero, Morelos), Belize, Panama, Venezuela ( Segura et al. 2013 ; Jaech et al. 2016 ). A previous altitudinal record of X. bufo is from 1,219 m ( Hinton 1940b ). In this study, the species was found at all sampling levels (670-1,776 m). Comments. Collected on substrates of gravel, macrophytes, and leaf packs, throughout the sampling months (February 2018 through February 2019, dry and rainy season).