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Coelotrachelus Schmidt 1913
Coelotrachelus Schmidt 1913: 140.

Coelotrachelus venustus (Schmidt)
Photo by P. Skelley.
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Type species. Aphodius kuntzeni Schmidt 1913: 140, by original designation.

Diagnosis. Body length 6-8 mm, elongate, flattened; red to black. Head usually with distinct clypeal teeth and fringe of setae. Pronotum usually explanate laterally, with sinuate base bearing small tooth. Pronotal base margined or not. Metatibial apical spinules long, unequal in length.
Distribution. Mexico and southwestern US.
Composition. Coelotrachelus contains 6 species.

Coelotrachelus burgosi
(Deloya and McCarty 1992: 2) [Aphodius], Mexico.
Coelotrachelus kuntzeni (Schmidt 1913: 140) [Aphodius], Mexico.
                  = Aphodius amplinotum Gordon and Howden 1973: 436.
                  = Aphodius michiliensis Deloya 1991: 200.
Coelotrachelus rudis LeConte 1878: 458 [Aphodius], SW-USA, Mexico.
                  = Aphodius fenyesi VanDyke 1947: 159.
Coelotrachelus symbius (Gordon and Howden 1973: 438) [Aphodius], Mexico.
Coelotrachelus venustus (Schmidt 1911: 28) [Aphodius], Mexico.
Life History. Coelotrachelus are rodent dung specialists, apparently with pocket gophers as primary hosts.
Larvae. Unknown.

Deloya, C., and J. D. McCarty. 1992. Descripcion de una especie nueva de Aphodius (Coleotrachelus) (Aphodiinae) y de la hembra de Parachrysina parapatrica (Rutelinae) (Coleoptera: Lamellicornia). Acta Zoologica Mexicana, Nueva Serie 53: 1-13. (key to all species except C. rudis)
Deloya, C. 1991. Una nueva especie mexicana de Aphodius (Coelotrachelus) Schmidt 1913 (Coleoptera: Scarabaeidae: Aphodiinae) asociada con Thomomys umbrinus (Rodentia: Geomyidae). Folia Entomologica Mexicana 81: 199‑207. (key to most species)
Gordon, R. D., and P. E. Skelley. 2007. A monograph of the Aphodiini inhabiting the United States and Canada (Coleoptera: Scarabaeidae: Aphodiinae). Memoirs of the American Entomological Institute 79: 580 pp.
Skelley, P. E., M. Dellacasa, G. Dellacasa, and R. D. Gordon. 2007. Checklist of the Aphodiini of Mexico, Central and South America (Coleoptera: Scarabaeidae: Aphodiinae). Insecta Mundi 0014: 1-14.

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Author: Paul Skelley

Generated on: 28/APR/08.....Last modified: 28/APR/08
University of Nebraska State Museum - Division of Entomology