Vol. 60, 2021
Species Redescriptions and New Species of the Onthophagus mexicanus Species Group (Coleoptera: Scarabaeidae), with Notes on Distribution and Rodent-dung Beetle Associations
Victor Moctezuma1,* and Gonzalo Halffter1
de Ecología, A. C., Red de Ecoetología, Carretera antigua a Coatepec
351, El Haya, Xalapa, 91073 Veracruz, Mexico. *Correspondence: E-mail:
E-mail: firstname.lastname@example.org (Halffter)
Received 1 January 2021 / Accepted 16 March 2021
Communicated by Jen-Pan Huang
The Onthophagus mexicanus species group includes at least 18 species: O. anewtoni Howden and Génier, O. arnetti Howden and Cartwright, O. browni Howden, O. cartwrighti Howden, O. championi Bates, O. concinnus Castelnau, O. cynomysi Brown, O. eulophus Bates, O. guatemalensis Bates, O. hecate (Panzer), O. macclevei Howden and Génier, O. medorensis Brown, O. mexicanus Bates, O. orpheus (Panzer), O. polyphemi Hubbard, O. pseudoguatemalensis sp. n., O. totonacus sp. n. and O. velutinus Howden and Cartwright. Onthophagus pseudoguatemalensis sp. n. and O. totonacus sp. n. are described from Mexico (Jalisco and Veracruz, respectively). Onthophagus cartwrighti, O. championi, O. eulophus and O. guatemalensis are redescribed, while lectotypes are designated herein for O. championi and O. eulophus. The distribution of O. cartwrighti is clarified; a new country record is provided for O. championi (Honduras); while new state records are reported for O. championi (Oaxaca and Veracruz, Mexico) and O. guatemalensis (Oaxaca, Mexico). The accurate distribution of O. eulophus
remains unknown since its original description. Updated distribution
maps are included for all the species within the group. An updated
determination key to species of the O. mexicanus species group is provided. The rarity of O. eulophus and O. totonacus
in entomological collections is thought to be a consequence of their
trophic habits; both species are suggested to be inquilines of rodent
nests or burrows.
Key words: Scarabaeinae, Onthophagini, Neotoma, Cynomys, Coevolution.
Citation: Moctezuma V, Halffter G. 2021. Species redescriptions and new species of the Onthophagus mexicanus species group (Coleoptera: Scarabaeidae), with notes on distribution and rodent-dung beetle associations. Zool Stud 60:0dd. doi:-.