Hornosus turnbowi, Dellacasa & Dellacasa & Gordon, 2015

Dellacasa, Marco, Dellacasa, Giovanni & Gordon, Robert D., 2015, A new genus for Drepanocanthoides larreae (Horn, 1887) and description of a new congeneric Mexican species (Coleoptera: Scarabaeidae: Aphodiinae), Insecta Mundi 2015 (407), pp. 1-6 : 3-5

Hornosus turnbowi new species

( Fig. 9–13 )

Type locality. Hwy 58, 8 km E jct 57, Nuevo León, Mexico.

Type repository. Florida State Collection of Arthropods, Gainesville, Florida, U.S.A.

Description. Length 4.0–4.5 mm; oblong, moderately convex, semiglossy, glabrous except elytra laterally and subapically shortly pubescent. Head and pronotum blackish, latter with sides broadly brownish yellow; elytra brownish yellow with a dark brown elongate discal stripe on second, third and fourth interstices, interrupted on preapical declivity by an ocellar yellowish spot, and with a lateral longitudinal dark brown stripe on seventh and eight interstices; legs yellowish brown with paler tarsi; antennal club piceous. Head with epistome almost flat, antero-medially narrowly deflexed, with extremely fine, rather sparse punctures evenly scattered throughout; clypeus deeply sinuate in middle, strongly lobate on either side, lobes strongly reflexed distally, faintly reflexed laterally, not bordered with glabrous margin; genae almost obsolete, very elongately ciliate, hardly protruding from eyes; frontal suture obsolete; frons almost imperceptibly punctured. Pronotum hardly longer than wide, feebly convex, minutely alutaceous, evenly, finely, sparsely punctured, but with a median longitudinal narrow impunctate areola; lateral margins feebly arcuate, distinctly bordered, edge elongately and rather densely ciliate; hind angles round, base evenly arcuate, very thinly bordered. Scutellum flat, alutaceous, finely punctured in basal half. Elytra elongately oval, convex, almost parallel-sided, finely striate; striae superficially and rather closely punctured, subcrenulate; interstriae flat, superficially alutaceous, sparsely finely punctured, shortly pubescent toward apex; epipleural margin elongately ciliate. Hind tibial upper spur shorter than first tarsal segment; latter somewhat longer than following three segments combined. Male: clypeus deeply sinuate in middle, with strongly projecting, apically reflexed lobes on either side of median sinuosity; foretibiae with sinuate inner margin with cultrate spur; aedeagus Fig. 12–13 . Female: clypeus moderately sinuate in middle, almost round on either side; foretibial inner margin not sinuate and with slender, acuminate spur.

Type material. MEXICO: Nuevo León: Hwy 58, 8 km E jct 57, 17.VII.1988., leg. R. Turnbow (holotype, male, allotype and 3 paratypes, FSCA; 1 paratype, DCGI) ; 4.7 mi E Galeana, 10.VI.1987, leg. B. K. Dozier (1 paratype, FSCA) .

Distribution. Mexico (Nuevo León).

Etymology. Named in honour of Robert H. Turnbow, Jr., specialist in Central American Cerambycidae , who collected most of the type series.

Biology. Almost unknown; the type specimens were collected in late spring and early summer.

Figures

Figure 1–13. 1–8) Hornosus larreae (Horn, 1887) (Florence, Arizona, U.S.A.). 1) Epipharynx. 2–3) Outline of clypeus (male and female). 4) Male right foretibia (dorsal view). 5–6) Habitus (length ideogram and morphological details). 7–8) Aedeagus (dorsal and lateral views). 9–13) Hornosus turnbowi new species (Hwy 58, 8 km E jct 57, Nuevo León, Mexico). 9) Epipharynx. 10–11) Habitus (length ideogram and morphological details). 12–13) Aedeagus (dorsal and lateral views).