Geomyphilus russeus ( Brown, 1928 )

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 : 10-11

Geomyphilus russeus ( Brown, 1928)

( Fig. 41–45 )

Aphodius (Platyderides) russeus Brown, 1928: 14 ; Dellacasa 1988: 252.

Aphodius russeus ; Ratcliffe 1991: 56.

Geomyphilus russeus ; Gordon and Skelley 2007: 408.

Type locality. Payne Co., Oklahoma [ U.S.A.].

Type repository. Canadian National Collection. Ottawa (type not examined).

Redescription. Length 6.0– 7.5 mm; oblong, moderately convex. shiny, glabrous. Pale reddish brown, head and pronotum slightly darker. Head with epistome gibbous on disc, finely punctured, rather coarsely closely, evenly punctured distally; clypeus broadly sinuate at middle, round at sides, very thinly bordered, edge upturned, glabrous; genae obtusely angulate, sparsely rather shortly ciliate, strongly protruding from the eyes; frontal suture finely impressed, faintly trigibbous; front coarsely densely evenly punctured throughout. Pronotum transverse, moderately convex, narrowly explanate toward anterior angles, dually punctured and with a posteromedian longitudinal areola impunctate; large punctures, three to four times larger than small, irregularly scattered, sparser on disc, denser on sides but absent on anteromedian discal area; small punctures rather irregularly sparse throughout but evenly dense at middle of anterior third; lateral margins almost straight, rather thinly bordered, edge glabrous; hind angles obtuse; base evenly arcuate, very thinly bordered. Scutellum flat, distinctly punctured basally. Elytra oval elongate, feebly broadened posteriorly, alutaceous on preapical declivity, finely striate; striae closely not deeply punctured, faintly crenulate; interstriae flat, finely, barely perceptibly punctate. Hind tibiae upper spur as long as first tarsal segment; latter almost as long as following three segments combined. Male: fore tibiae spur thickened and abruptly bent downward toward apex; inferior spur of middle tibiae very short, apically truncate; aedeagus Fig. 44–45 . Female: fore tibiae spur slender and feebly bent downward; inferior spur of middle tibiae moderately elongate but slender and acuminate.

Material examined. U.S.A.: New Mexico: Raven Flats, Bernalillo Co., 7627 ft, UTM 13S 37.98306E 38.74097N, 08.XI.2010, leg. J. M. Rowland, under dead gopher in tunnel (2 exx., DCGI).

Distribution. U.S.A. (Arizona, Illinois, Iowa, Kansas, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota).

Biology. July to October widespread species rodent burrows associate. Sometimes it has been collected in burrows of Geomys bursarius .

Figures

Figures 41–50. Illustrations of species. 41–54) Geomyphilus russeus (Brown, 1928) (Raven Flats, Bernarillo Co., New Mexico, U.S.A.). 41) Epipharynx. 42–43) Habitus (morphological details and length ideogram). 44–45) Aedeagus (dorsal and lateral view). 46–50) Geomyphilus tuzincola new species (2 km S [San Nicolás] Coatepec, Estado de México, Mexico). 46) Epipharynx. 47–48) Habitus (morphological details and length ideogram). 49–50) Aedeagus (dorsal and lateral view).