Adoretus drumonti, Limbourg, 2016

Limbourg, Pol, 2016, Contribution to the knowledge of Afrotropical Rutelinae IV (Coleoptera: Scarabaeoidea: Melolonthidae), Belgian Journal of Entomology 38, pp. 1-42 : 1-42

Adoretus drumonti sp. nov.

( Figs 53-54 , 57-58)

TYPE MATERIAL. Holotype ♂: [Coll. I.R.Sc.N.B., ZAMBIA N. W., 50km E. of Mwinilunga , 28.X.2008, I. G.: 31.208, Leg. M. Snizek] ( RBINS).

DESCRIPTION

Male

Measurements and ratios ♂ (n = 1): LB: 11.5 mm, lB: 6 mm; ratio LB/lB: 1.66; LP/lP: 0.49; LE/lE: 1.30.

Body: laterally convex, relatively elongate, slightly bent, broader in middle of elytra; abdomen concave; short process at base of prosternum rounded; pale reddish brown with vertex, frons and impressed point on lateral margins of pronotum blackish; clypeus, basal part of vertex and tarsi reddish, slightly shining.

Head: as broad as anterior margin of pronotum; eyes large; clypeus trapezoidal with anterior angles rounded, entirely reflexed; clypeus and vertex totally covered with tubercles; frons impunctate; antennae 10-segmented, with club longer than funicle.

Thorax: pronotum rectangular, broader than long; sides uniformly rounded from base to apex; all margins carinate, anterior angles slightly projecting and reaching posterior margin of eyes; transversely striated; scutellum triangular with rounded sides, transversely striated.

Elytra: longer than broad; epipleura complete; costae slightly elevated; intervals strongly striated transversely; striae obsolete except sutural one formed by a deep groove; humeral and apical calli slightly marked.

Pygidium: rounded, carinate along anal plate, not projecting postero-ventrally and not surpassing apex of elytra.

Legs: protibiae tridentate, larger claw elongate, as long as last tarsomere, 2 times longer than smaller; pro-and mesotarsal larger claw cleft; larger claw of metatarsus 3 times longer than smaller and uncleft.

Hairs: upper and underside covered with short white, squamous, decumbent setae, lateral margins of pronotum and elytra with long separated erected brownish setae, close on canthus; underside with sparse erected brownish setae inserted in setigerous points on sternites; femora with long erected brownish setae; longer erected brownish setae on disc of pygidium; apex glabrous.

Aedeagus: in lateral view, parameres short and perpendicular to median part, slightly sinuate dorsally; in dorsal view, lateral margins of parameres three times strongly sinuate, strongly concave to apico-internal angle; long setae on apico-internal angle.

Female. Unknown

DERIVATIO NOMINIS. Dedicated to my colleague Alain Drumont (Bruxelles, Belgium).

DISTRIBUTION. Known from Zambia.

BIOLOGY. The species was collected in October.

DIAGNOSIS. A. drumonti sp. nov. is extremely similar to A. aurantiacus Benderitter, 1922 but can be distinguished as follows:

Figures

Figs 53-54. Adoretus drumonti holotype habitus (11.5mm): (53), dorsal view; (54), lateral view. Figs 55-56. Adoretus aurantiacus habitus (12.5mm): (55), dorsal view; (56), lateral view. Figs 57-58. Adoretus drumonti holotype: (57) aedeagus, lateral view; (58) parameres, dorsal view. Figs 59-60. Adoretus aurantiacus: (59) aedeagus, lateral view; (60) parameres, dorsal view.