Adoretus (Lepadoretus) carolinae, Limbourg, 1844

Limbourg, Pol, 1844, Contribution to the knowledge of Afrotropical Rutelinae VI (Coleoptera, Scarabaeidae, Rutelinae), Belgian Journal of Entomology 80, pp. 1-41 : 1-41

Adoretus (Lepadoretus) carolinae sp. nov.

urn:lsid:zoobank.org:act:68DE2B0B-0B5E-4092-985A-AA0BABC67A57

(Figs 77–82)

TYPE MATERIAL. Holotype ♂: [SIERRA-LEONE, Eastern Pr. , Tonkolili District, 9km N. Natotoka, 23.V. 2018, 173m, N8°43’41.4’’ / W11°48’06.2’’, light trap, M. François leg.] [Coll. I.R.Sc.N.B., don P. Limbourg, I.G.: 33.944] ( RBINS).

Paratypes: 13♂, 3♀: same collection data as for holotype (4♂, 2♀: RBINS; 1♂: MFNB; 1♂: BMNH; 6♂, 1♀: PCMF; 1♂: MSPC) ; 17♂, 4♀: [SIERRA-LEONE, Eastern Pr. , Tonkolili District, 9km N. Natotoka, 23.V. 2018, 173m, N8°43’41.4’’ / W11°48’06.2’’, light trap, S. Rojkoff leg.] [Coll. I.R.Sc.N.B., don P. Limbourg, I.G.: 33.944] (8♂, 2♀: RBINS; 8♂, 2♀: PCSR) ; 1♂: [ Guiné-Bissau, Jemberem (Cambeque), 13/7/2009, Col. A. Serrano, 2723] ( ACS) ; 2♂: [ Guiné-Bissau, Jemberem (Cambeque), 13/7/2009, Col. A. Serrano] [Coll. I.R.Sc.N.B., don P. Limbourg, I.G.: 33.944] (1♂: ACS; 1♂: RBINS) ; 1♂: [ Guiné-Bissau, Jemberem (Cambeque), 13/7/2009, Col. A. Serrano, 2724] ( ACS) ; 2♂: [ Guiné-Bissau, Jemberem (Cambeque), 13/7/2009, Col. A. Serrano] [Coll. I.R.Sc.N.B., don P. Limbourg, I.G.: 33.944] (1♂: ACS; 1♂: RBINS) ; 1♂: [ Guiné-Bissau, Indjassen (4km), (Cufada), 16/7/2009, Col. A. Serrano, 2422] ( ACS) ; 1♂: [ Guiné-Bissau, Indjassen (4km), (Cufada), 16/7/2009, Col. A. Serrano] [Coll. I.R.Sc.N.B., don P. Limbourg, I.G.: 33.944] ( RBINS) .

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DESCRIPTION:

Male

Measurements ♂: length: 8–9.5 mm, width: 3.5–4 mm.

Body: Laterally slightly convex, relatively elongate, slightly bent, broader in middle of elytra; abdomen concave; short process at base of prosternum rounded; entirely brownish with blackish irregular desquamulate patches on pronotum and elytra, pygidium blackish-brown, legs reddish; antennae yellowish; slightly shining.

Head: broad, clypeus rounded, totally reflexed; clypeus and frons covered with tubercles; vertex with shallow horseshoe-shaped punctures; antennae with 10 antennomeres, with club longer than funicle.

Thorax: pronotum rectangular, wider than long; sides slightly angular in the middle, with all margins carinate; anterior angles slightly projecting and reaching posterior margin of eyes; with close shallow horseshoe-punctures; blackish desquamulate patches microreticulate; impressed point on lateral margins.

Scutellar shield rather triangular with rounded sides, with shallow horseshoe-punctures.

Elytra: longer than wide; epipleura complete; primary costae more convex than intervals, secondary striae with close horseshoe-shaped punctures; striae formed by a line of close horseshoe-shaped punctures; humeral calli marked, apical calli strongly marked; apex of elytra coarsely punctuated, glabrous below calli.

Pygidium: triangular with apex rounded, carinate along anal plate; disc glabrous and strigate; slightly projecting postero-ventrally, and not surpassing apex of elytra.

Venter: upper part of metaventrite with close shallow horseshoe-shaped punctures, sparsely towards median part; abdominal ventrites with imbricate puncture.

Legs: protibiae tridentate; pro- and mesotarsal larger claws cleft; metatarsus with larger claw twice longer than smaller one and uncleft.

Hairs: dorsal side covered with short yellowish-white, squamous, decumbent setae; closer on disc of elytra, along sutural striae and after declivity; four tufts of close longer yellowish-white scales around humeral calli, the largest with longer setae on top of humeral calli; long separated erected yellowish setae on antennae, on canthus and along lateral margins to declivity of elytra.

Underside covered with longer yellowish-white, squamous, decumbent setae, slightly longer and closer on sides of mesoventrite; sparse long decumbent brownish-yellow setae inserted in setigerous punctures, one single setigerous puncture on meso and metacoxae, transversal line on abdominal ventrites, closer along anal plate; close long decumbent yellowish-white setae along anterior and posterior margins of prosternum, longer and erected on base of labium; pygidium covered with separated yellowish-white squamous setae, short and decumbent on sides, progressively longer and erected to disc, apex glabrous, a tuft of close long erected yellowish-white setae to the middle part of base.

Outer and inner sides of protibiae, metatibiae and outer sides of mesotibiae with short, yellowish-white, squamous, decumbent, setae; inner sides of mesotibiae desquamulate; inner margins of protibiae with a line of close long, erected brownish setae.

Aedeagus: poorly sclerotized, in lateral view, parameres perpendicular to median part, ventrally strongly sinuate before apex, dorsally slightly curved; in dorsal view, base undulate and almost perpendicular; lateral margins of parameres parallel from base to apex; apex with two triangular shaped projections.

Female

Measurements ♀: length: 9.5–10 mm, width: 4.5–5 mm.

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Differs from ♂ by: larger, laterally more convex and abdomen convex; antennae with club as long as funicle; pygidium strongly projecting postero-ventrally and not surpassing apex of elytra; protibiae with apical teeth broader.

DERIVATIO NOMINIS.

Dedicated to Caroline Roniat, the girlfriend of Sébastien Rojkoff (Sourcieux-les-Mines, France).

DISTRIBUTION. Known from Sierra Leone.

BIOLOGY. The species was collected in May and July.

DIFFERENTIAL DIAGNOSIS.

Adoretus (Lepadoretus) carolinae sp. nov. and A. (Lepadoretus) hanoti sp. nov. are both very similar to A. (Lepadoretus) amoenus Frey, 1970 described from Guinea but can be distinguished by: