Coelotrachelus venustus ( Schmidt, 1911 )

Dellacasa, Marco, Dellacasa, Giovanni & Gordon, Robert D., 2009, Systematic revision of the genus Coelotrachelus Schmidt, 1913 (Scarabaeoidea: Scarabaeidae: Aphodiinae), Insecta Mundi 2009 (86), pp. 1-13 : 11-13

Coelotrachelus venustus ( Schmidt, 1911)

( Fig. 28-32 )

Aphodius venustus Schmidt, 1911: 28 .

Aphodius (Coelotrachelus) venustus ; Schmidt 1913: 140; Dellacasa 1988: 237.

Coelotrachelus venustus ; Skelley et al. 2007: 3 (new combination).

Type locality. Mexico.

Type repository. Naturhistoriska Riksmuseet. Stockholm (holotype male examined).

Redescription. Length 8.0 mm; elongate, moderately convex, strongly shiny, glabrous. Brown-reddish; antennal club pale testaceous. Head wide, epistome feebly convex on disc and very finely regularly punctured throughout; clypeus broadly and feebly sinuate at middle, acutely denticulate at sides, thinly bordered, border laterally elongately ciliate; genae obtusely rounded, elongately sparsely ciliate, protruding more than eyes; frontal suture nearly faint; front relatively more sparsely punctured. Pronotum broadly transverse, with extremely fine punctures regularly scattered throughout, punctation somewhat confuse toward hind angles; sides moderately flattened, very thickly bordered, border near imperceptibly bristled, S-shaped before hind angles; latter acutely prominent and situated half way between the base of the fifth and sixth striae; base distinctly bisinuate, thinly bordered. Scutellum finely sparsely punctured on basal half. Elytra oval-elongate, convex, subdenticulate at shoulder; striae fine, rather superficially punctured, faintly crenulate; interstices nearly flat, minutely punctured. Hind tibial upper spur as long as first tarsal segment; latter as long as following three segments combined. Male fore tibial spur relatively stout, subcylindrical, bent abruptly downward; aedeagus Fig. 29-30 . Female: unknown.

Material examined. Only the holotype was examined.

Distribution. Mexico.

Bionomics. Unknown.

Figures

Figures 28-32. Coelotrachelus venustus (Schmidt, 1911), holoype. 28) Habitus (morphological details). 29-30) Aedeagus (dorsal and lateral view). 31) Habitus. 32) Epipharynx.