Geomyphilus essigi ( Saylor, 1935 )

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 : 5-6

Geomyphilus essigi ( Saylor, 1935)

( Fig. 11–15 )

Aphodius essigi Saylor, 1935: 134 .

Aphodius ( Nobius ?) essigi ; Dellacasa 1988: 351.

Geomyphilus essigi ; Gordon and Skelley 2007: 404.

Type locality. Somma Co., California [ U.S.A.].

Type repository. California Academy of Sciences. San Francisco, U.S.A. (type not examined).

Redescription. Length 4.0– 4.5 mm; oblong, convex, moderately shiny, glabrous. Head distally, pronotum sides and legs reddish brown; elytra dark yellowish brown; antennal club rufo-piceous. Head with epistome feebly convex on disc, somewhat depressed medially toward clypeal margin, finely, not closely, regularly punctured; clypeus sinuate at middle, round at sides, thinly bordered, edge feebly upturned, glabrous; genae obtusely round, sparsely ciliate, protruding from the eyes; frontal suture slightly tuberculate at least medially; front finely, rather densely, regularly punctured. Pronotum transverse, moderately convex, dually punctured; large punctures, five to six times larger than small, irregularly scattered throughout; small fine punctures, not densely, somewhat regularly sparse all over; lateral margins feebly arcuate, distinctly bordered, edge glabrous; hind angles obtusely round; base slightly bisinuate, distinctly bordered. Scutellum flat, coarsely punctured on basal half. Elytra elongate, almost parallel-sided, rather deeply striate; striae coarsely, not closely punctured, crenulate, interstriae moderately convex, finely irregularly punctured. Hind tibiae upper spur shorter than first tarsal segment; latter as long as following three segments combined. Male: frontal suture with feeble median tubercle; inferior spur of middle tibiae stout, short and apically subtruncate; aedeagus Fig. 14–15 . Possibly in female the fore tibiae spur may be slender, almost straight and regularly acuminate.

Material examined. U.S.A.: California: Danville, Contra Costa Co., 07–24.IV.1952, leg. F. X. Williams, ex gopher nests (1 ex., GCWC).

Figures

Figures 11–20. Illustrations of species. 11–15) Geomyphilus essigi (Saylor, 1935) (Danville, Contra Costa Co., California, U.S.A.). 11) Epipharynx.12–13) Habitus (morphological details and length ideogram).14–15) Aedeagus (dorsal and lateral view). 16–20) Geomyphilus geronimo (Gordon and Skelley, 2007) (8 mi. SE of Portal, State Line Road at Portal, Cochise Co., Arizona, U.S.A.). 16) Epipharynx. 17–18) Habitus (morphological details and length ideogram). 19–20) Aedeagus (dorsal and lateral view).