Onthophagus halffteri Zunino was originally described based on a single specimen (a hypertelic male), the only one known at that time. The capture of several series with an abundance of individuals allows us to now describe hypertelic (major), eutelic (medium), and hypotelic (minor) males and females. Additionally, the assignment of O. halffteri to the hippopotamus line within the chevrolati group of American species of Onthophagus Latreille is confirmed, with Onthophagus hippopotamus Harold the species that is most closely related to O. halffteri. The association of O. halffteri with nests of Geomyidae (Rodentia) is established, and the conditions that separate the distribution of O. halffteri from that of O. hippopotamus are given. Onthophagus halffteri and O. hippopotamus are two species that, while practically adjacent, never overlap in a given nest. Biogeographically, O. halffteri represents the largest eastward expansion of the hippopotamus line, which is distributed along the mountains of Mexico, particularly the Trans-Mexican Volcanic Belt.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 69 • No. 2