Abstract
Two new species of Megarthrus are described from cloud forests of the Mexican state of Veracruz: M. cavianae Rodríguez, Navarrete-Heredia & Arriaga-Varela sp. nov., and Chiapas: M. chiapas Cuccodoro sp. nov. They differ from the two hitherto known Mexican species M. altivagans Bernhauer, 1929, and M. alatorreorum Rodríguez & Navarrete-Heredia, 2015, both from temperate forests of the Transmexican Volcanic Belt, by having synapomorphic features of the M. inaequalis-supergroup of species. This lineage includes all the Central and South American members of the genus, with the inclusion of these species, the distribution of the group is extend by more than 5 degree of latitude to the North. Within this lineage, the two new species share a very peculiar morphology of the male abdominal sternite VIII found elsewhere in the genus only in M. flavosignatus Bierig, 1940, and M. zunilensis Sharp, 1887, with which they form the M. zunilensis-group of species defined here.
References
Bernhauer, M. (1929) Neue Staphyliniden aus Mittelamerika. Wiener Entomologische Zeitung, 46, 186−208.
Bierig, A. (1940) Proteinini (Col. Staph.) Costaricenses. Revista de Entomologia, 11, 373–380.
Cuccodoro, G. (1998) Revision and phylogeny of Megarthrus Curtis 1829 from New Guinea, New Caledonia and Fiji (Coleoptera Staphylinidae Proteininae). Tropical Zoology, 11, 103−137.
https://doi.org/10.1080/03946975.1998.10539356
Cuccodoro, G. (2011) Revision of the Neotropical types of Megarthrus Curtis, 1829 and description of two new species from Costa Rica and Peru (Coleoptera, Staphylinidae, Proteininae). Revue Suisse de Zoologie, 118 (1), 107–147.
https://doi.org/10.5962/bhl.part.117802
Cuccodoro, G. (2018) Megarthrus Curtis, 1829 of Malawi (Coleoptera, Staphylinidae, Proteininae). Entomologische Blätter und Coleoptera, 114, 145–149. [ISSN 0013-8835]
Cuccodoro, G. & Löbl, I. (1995) Revision of the Afrotropical rove-beetles of the genus Megarthrus (Coleoptera, Staphylinidae, Proteininae). Revue suisse de Zoologie, 102, 655–761.
https://doi.org/10.5962/bhl.part.80479
Cuccodoro, G. & Löbl, I. (1996) Revision of the rove-beetles of the genus Megarthrus of America north of Mexico (Coleoptera, Staphylinidae, Proteininae). Mitteilungen der Münchner Entomologischen Gesellschaft, 86, 145–188.
https://doi.org/10.5962/bhl.part.79957
Herman, L. (2001) Catalog of the Staphylinidae (Insecta: Coleoptera). 1758 to the end of Second Millennium. Bulletin of the American Museum of Natural History, 7 (265), 1–4218. [American Museum of Natural History, New York]
https://doi.org/10.1206/0003-0090.265.1.1
Liu, Z.-P. & Cuccodoro, G. (2020) Megarthrus of China. Part 1. Description of a new species resembling M. antennalis Cameron, 1941 (Coleoptera: Staphylinidae: Proteininae). Zootaxa, 4750 (2), 269–276.
https://doi.org/10.11646/zootaxa.4750.2.10
López-García, M.M., Méndez-Rojas, D.M. & Navarrete-Heredia, J.L. (2011) First record and a new species of Megarthrus Curtis (Coleoptera, Staphylinidae, Proteininae) from the Colombian Central Andes. Zootaxa, 2916 (1), 6264.
https://doi.org/10.11646/zootaxa.2916.1.5
Navarrete-Heredia, J.L., Newton, A.F., Thayer, M.K., Ashe, J.S. & Chandler, D.S. (2002) Guía ilustrada para los géneros de Staphylinidae (Coleoptera) de México. Illustrated guide to the genera of Staphylinidae (Coleoptera) of México. Universidad de Guadalajara y Conabio, Guadalajara, Jalisco, 401 pp.
Pérez, L., Rodrígez, M. & Asenjo, A. (2020) A new Peruvian species of Megarthrus Curtis (Coleoptera: Staphylinidae: Proteininae). Zootaxa, 4731 (4), 581–588.
https://doi.org/10.11646/zootaxa.4731.4.11
Rodríguez, W.D. & Navarrete-Heredia, J.L. (2015) A new Mexican species of Megarthrus Curtis (Coleoptera, Staphylinidae, Proteininae). Zootaxa, 3918 (4), 594–598.
https://doi.org/10.11646/zootaxa.3918.4.9
Sharp, D. (1887) Staphylinidae. In: Biologia Centrali-Americana. Insecta, Coleoptera. 1 (2). Taylor & Francis, London, pp. 673–824.