Geomyphilus rubiginosus ( Horn, 1870 )

Dellacasa, Marco, Dellacasa, Giovanni, Skelley, Paul E. & Gordon, Robert D., 2017, Systematic revision of the species of Geomyphilus (Coleoptera: Scarabaeidae: Aphodiinae) of Mexico and neighboring countries with description of a new Mexican species, Insecta Mundi 2017 (590), pp. 1-19 : 9-10

Geomyphilus rubiginosus ( Horn, 1870)

( Fig. 36–40 )

Aphodius rubiginosus Horn, 1870: 127 ; 1887: 39.

Aphodius (Koshantschikovius) rubiginosus ; Schmidt 1913: 150; Dellacasa 1988: 191.

Geomyphilus rubiginosus ; Gordon and Skelley 2007: 400.

Type locality. Camp Grant, San Pedro River, Arizona [ U.S.A.].

Type repository. Museum of Comparative Zoology. Harvard University, Cambridge. MA ( U.S.A.) (type not examined).

Redescription. Length 4.0–5.0 mm; moderately elongate; moderately convex, feebly shiny, glabrous. Red to dark brown; epistome and pronotal disc slightly darker; antennal club rufo-testaceous. Head with epistome slightly convex on disc, antero-medially depressed toward clypeal margin, densely almost evenly punctured, punctures somewhat coarser distally; clypeus broadly sinuate at middle, subangulate at sides, lateral margins regularly arcuate, thinly bordered, edge slightly raised, glabrous; genae obtusely round, shortly sparsely ciliate, protruding from the eyes; frontal suture barely distinct and faintly tuberculate; front evenly coarsely rather densely punctured. Pronotum transverse, moderately convex, not explanate at sides, coarsely and densely dually punctured; large punctures, two times larger than small, not denser on sides and lacking on disc; small punctures almost evenly scattered throughout; lateral margins feebly arcuate, rather thinly bordered, edge glabrous; hind angles obtuse; base regularly arcuate, thinly bordered. Scutellum somewhat convex, finely alutaceous, coarsely irregularly punctured on basal two thirds. Elytra feebly widened posteriorly; striae fine, moderately impressed, closely punc- tured, crenulate; interstriae almost flat, rather coarsely irregularly punctured. Hind tibiae upper spur shorter than first tarsal segment; latter almost as long as following three segments combined. Male: fore tibiae spur relatively stout, abruptly downward curved; head and pronotum more transverse, less convex and less densely punctured; metasternal plate distinctly excavate; aedeagus Fig. 39–40 . Female: fore tibiae spur slender and feebly arcuate; head and pronotum narrower, more convex and more densely punctured; metasternal plate almost flat.

Material examined. U.S.A.: Arizona: Wickenburg-Simpson Ranch, Maricopa, 12S 34.0765E 37.59185N UTM, 16–23.I.2008, 2013 ft., leg. P. Kaufman, deer dung baited pitfall in Thomomys bottae burrow (6 exx., DCGI).

Distribution. U.S.A. (Arizona).

Biology. Almost certainly a rodent burrows associate species collected from January to April. Trapped from burrows and reared from dung of Thomomys bottae .

Figures

Figures 31–40. Illustrations of species.31–35) Geomyphilus pierai(Lobo and Deloya 1996) (Los Pescados, Cofre de Perote, Estado de Veracruz, Mexico). 31) Epipharynx.32–33) Habitus (morphological details and length ideogram). 34–35) Aedeagus (dorsal and lateral view). 36–40) Geomyphilus rubiginosus (Horn, 1870) (Wickenburg-Simpson Ranch, Maricopa, Arizona, U.S.A.). 36) Epipharynx. 37–38) Habitus (morphological details and length ideogram). 39–40) Aedeagus (dorsal and lateral view).