Mandible evolution in the Scarabaeinae (Coleoptera: Scarabaeidae) and adaptations to coprophagous habits

Revision of the genus Holocephalus (Coleoptera: Scarabaeidae: Scarabaeinae: Coprini)

The genus Holocephalus Hope is revised and now contains fi ve species: H. cristatus (Gillet), H. eridanus (Olivier), H. julieni sp.nov. H. sculptus (Gillet), and H. simoni sp.nov. All taxa are described and illustrated. A key to species of Holocephalus is included. Lectotypes are designated for H. eridanus and H. sculptus. Scarabaeus eridanus Olivier is designated as the type species for the ge...

Diversity of Coprophagous Scarabaeidae (Coleoptera) in Grazed Versus Ungrazed Sandhills Prairie in Western Nebraska

Taxonomic revision of the Dichotomius speciosus (Waterhouse, 1891) species group (Coleoptera: Scarabaeidae: Scarabaeinae).

The Dichotomius speciosus species group, endemic to the highlands of the Brazilian Atlantic Forest and included in the subgenus Luederwaldtinia is taxonomically revised. Dichotomius alvarengai new species and D. malyi new species are described. Dichotomius bucki is here considered to be a new synonym of D. opalescens, for which a lectotype is designated. The group, as well as its species, is di...

The South American Dung Beetle Genus Ennearabdus Lansberge (Coleoptera: Scarabaeidae: Scarabaeinae: Eucraniini)

The South American endemic dung beetle genus Ennearabdus Lansberge is revised. Description, diagnosis and illustrations are presented for the only known species of the genus, E. lobocephalus (Harold). A lectotype is designated for Onthophagus lobocephalus Harold, the type species of Ennearabdus. The biology, biogeography, conservation status, and distribution based on the predictive distributio...

A revision of the Deltochilum subgenus Aganhyboma Kolbe, 1893 (Coleoptera: Scarabaeidae: Scarabaeinae).

The species of the Deltochilum subgenus Aganhyboma, endemic to Central and South America, are reviewed. The species have been divided into complexes, with a brief diagnosis presented for each. A key for identification of 26 currently recognized species is provided in English and Portuguese. Two major groups within the subgenus are recognized (trisignatum and valgum). The first is represented by...