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 Macrelmis leonilae Spangler & Santiago-Fragoso, 1986 Distribution. Mexico (Chiapas, Guerrero, Morelos, Oaxaca, Veracruz), Guatemala, Honduras, Nicaragua, Costa Rica, Peru ( Santiago-Fragoso and Spangler 1995 ; Segura et al. 2013 ). A previous altitudinal record of M. Macrelmis leonilae is 1,075 m ( Spangler and Santiago-Fragoso 1986 ). Herein, this species was collected at level 1 (670 m), 2 (934 m), 3 (1,126-1,194 m), 4 (river 2, 1,619 m), and 5 (1,763-1,776 m). Comments. Collected on substrates of gravel, macrophytes, and leaf packs, throughout sampling months (February 2018 through February 2019, dry and rainy season).