Adoretus (Adoretus) scotti, Limbourg & Dekoninck & Seidel, 2024

Limbourg, Pol, Dekoninck, Wouter & Seidel, Matthias, 2024, Contribution to the knowledge of Afrotropical Rutelinae VII (Coleoptera, Scarabaeidae, Rutelinae), Belgian Journal of Entomology 145, pp. 1-48 : 32-34

Adoretus (Adoretus) scotti sp. nov.

urn:lsid:zoobank.org:act:86227387-24B3-4E2A-82E4-9264869049E1

Fig. 17

TYPE MATERIAL.

ZAMBIA. Holotype ♂: [Coll. I.R.Sc.N.B., ZAMBIA, Eastern Pr. , Chipata , XI.1964, Ex. Coll. V. Allard , IG.: 33167] ( RBINS).

DESCRIPTION.

MALE. Measurements: length: 14 mm, width: 7 mm.

Body: laterally convex, elongate, slightly bent, broader in middle of elytra; abdomen concave; perpendicular process at base of prosternum pointed, median part with a large, backwardly, curved membranous fold, on second to fourth abdominal ventrite, margin on third abdominal ventrite strongly sinuate in middle, denticulate on sides, margin on fourth abdominal ventrite denticulate; yellowish-brown with head, all margins, tarsi and spines on outer sides of legs reddish-brown; teeth of protibiae, apex of upper lip, apex of mandibles and margin on abdominal ventrite blackish; slightly shiny.

Head: broad; clypeus rounded, entirely reflexed, totally covered with tubercles; vertex with isolated tubercles; antennae with 10 antennomeres, with club slightly longer than funicle.

Thorax: pronotum rectangular, wider than long; sides uniformly rounded from base to apex; all margins with complete marginal line; anterior angles projecting and reaching posterior margin of eyes; with shallow horseshoe-shaped punctures, almost coalescent on sides; scutellar shield subobtuse, with rounded apex, with shallow horseshoe-shaped punctures.

Elytra: longer than wide; epipleura complete; primary costae slightly more convex than interstices; all secondary striae irregularly punctate with horseshoe-shaped punctures; striae formed by a line of close small horseshoe-shaped punctures; humeral and apical calli slightly marked.

Pygidium: triangular, apex rounded, marginated along anal plate, slightly imbricate-punctate; not projecting postero-ventrally and not surpassing apex of elytra.

Venter: lateral part of metaventrite with large transversal crescent punctures, middle part almost smooth; lateral part of abdominal ventrites imbricate punctate, middle part almost smooth.

Legs: protibiae tridentate and relatively slender, inner claw elongate and cleft, slightly shorter than last tarsomere, mesotarsal outer claw cleft, longer than last tarsomere; outer claw of metatarsus two times and half longer than inner claw and uncleft.

Setation: dorsal side covered with short, white, squamous decumbent setae; long, widely spaced, erected yellowish setae from lateral margins of pronotum to declivity of elytra, on antennae, on canthus and on clypeus; underside with long, whitish, squamous decumbent setae on metaventrite; lines of white, shorter, squamous decumbent setae with lines of long, erected, brownish-yellow setae inserted in setigerous punctures on abdominal ventrites; close, long, decumbent yellowish-brown setae along anterior and posterior margins of prosternum; long, erected yellowish setae on disc of pygidium, apex glabrous; long, erected yellowish-brown setae on base of labium; outer sides of tibiae with short, white, squamous decumbent setae; inner sides with erected brownish-yellow setae and long, erected brownish-yellow setae inserted in setigerous punctures on margin. Aedeagus: in lateral view, parameres relatively elongate and straight, apex slightly ventrally curved; in dorsal view, lateral margins of parameres slightly curved, almost straight, apex laterally sinuate and rounded.

DERIVATIO NOMINIS.

Dedicated to the late Ronald Belford “Bon” Scott (1946-1980), lead vocalist and lyricist of the AC/DC hard rock band.

DISTRIBUTION.

Known from Zambia.

BIOLOGY.

The species was collected in the month of November.

DIFFERENTIAL DIAGNOSIS.

Adoretus (Adoretus) scotti sp. nov. is similar to A. nathanlimbourgi Limbourg, 2014 but can be distinguished as follows:

A. (Adoretus) scotti sp. nov. ( Fig. 17 )

Aedeagus: in lateral view, parameres relatively elongate and straight, apex slightly ventrally curved; in dorsal view, lateral margins of parameres slightly curved almost straight, apex laterally sinuate and rounded.

Median part of second to fourth abdominal ventrites with large, backwardly, curved membranous fold.

A. nathanlimbourgi Limbourg, 2014 ( Figs 17–18 )

Aedeagus: in lateral view, parameres curved; in dorsal view, lateral margins of parameres almost triangular, apex slightly sinuate and rounded.

Abdominal ventrites not carinate.

Figures

Fig. 17. Adoretus (Adoretus) scotti sp. nov. Holotype ♂ (RBINS). A-B, habitus. A, dorsal view. B, lateral view. C-D, aedeagus. C, lateral view. D, dorsal view. E, distribution map of Adoretus (Adoretus) scotti sp. nov. and Adoretus (Adoretus) nathanlimbourgi Limbourg, 2014.