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 Genus Dryops Olivier, 1791 Dryops mexicanus Sharp, 1882 Note. Dryops has a worldwide distribution and comprises 79 species ( Shepard and Sites 2016 ), three of them are recorded from Mexico. Distribution. Mexico (Chiapas, Morelos), Belize, Costa Rica ( Burgos and Trejo-Loyo 2001 ; Shepard 2004 ; Barr and Shepard 2017 ; Zaragoza-Caballero et al. 2019 ). It has been recorded at an altitudinal range of 200 to 840 m ( Barr and Shepard 2017 ); in this study D. mexicanus was collected at levels 1 (670 m), 2 (934 m), and 3 (1,126-1,194 m). Comments. Collected on substrates consisting of gravel, macrophytes, and leaf packs; found in all sampling months (February 2018 through February 2019, dry and rainy seasons); also collected with a bucket light trap.