Adoretus depressusoides, 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 depressusoides sp. nov.

urn:lsid:zoobank.org:act:650F5BBA-8B7F-48E7-8AF3-B7E396570EC9

( Figs 45–51)

TYPE MATERIAL. Holotype ♂: [Coll. I.R.Sc.N.B., ZAMBIA N.W., 150km S. of Mwinilunga , 18.X.2008, M. Snizek leg., I.G.: 31.208] ( RBINS).

Paratypes: 1♂, 3♀: same data as holotype ( RBINS) ; 6♂, 72♀: [Coll. I.R.Sc.N.B., ZAMBIA N.W., 150km S. of Mwinilunga , 02.IX.2008, M. Snizek leg., I.G.: 31.208] (6♂, 69♀: RBINS; 1♀: BMNH; 1♀: MFNB; 1♀: MSPC) .

DESCRIPTION:

Male

Measurements ♂: length: 9.5–11 mm, width: 4.5–5 mm.

Body: Laterally convex, relatively elongate, slightly bent, broader in middle of elytra; abdomen concave; perpendicular process at base of prosternum rounded, spinose process on second and third abdominal ventrites; yellowish with clypeus, tarsi and spines on outer sides of legs reddish-brown; vertex, teeth of protibiae, apex of labrum and mandibles blackish-brown; slightly shining.

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

Thorax: pronotum rectangular, wider than long; sides uniformly rounded from base to apex; all margins carinate; anterior angles slightly projecting and reaching posterior margin of eyes; separated rounded punctures, almost coalescent on sides; impressed point on lateral margins; scutellar shield triangular, rounded apex, with small isolated punctures.

Elytra: longer than wide; epipleura complete; primary costae more convex than intervals; all secondary striae irregularly punctate, almost coalescent; striae formed by a line of close small, rounded punctures; humeral and apical calli slightly marked.

Pygidium: triangular, apex rounded, carinate along anal plate, slightly coriarious-punctate to the base; not projecting postero-ventrally and not surpassing apex of elytra.

Venter: upper part of metaventrite with moderately deep, rounded punctures, middle part with small shallow isolated horseshoe-shaped punctures; abdominal ventrites with irregular rounded punctures.

Legs: protibiae tridentate, larger claw elongate, slightly shorter than last tarsomere, pro-and mesotarsal larger claw cleft; larger claw of metatarsus 2 times longer than smaller and uncleft. Hairs: dorsal side covered with short white, squamous, decumbent setae; long separated erected yellowish setae from lateral margins of pronotum to declivity of elytra; shorter on antennae and on canthus; underside with sparse short white, squamous decumbent setae; sparse long decumbent brownish-yellow setae inserted in setigerous punctures, one single setigerous puncture on metacoxae, transversal line on abdominal ventrites; close long decumbent yellowish-brown setae along anterior and posterior margins of prosternum; longer white

11

erected squamous setae on pygidium, apex glabrous; long erected yellowish-brown setae on base of labium; outer sides of legs with short, white, squamous, decumbent, setae, inner sides with long erected brownish-yellow setae inserted in setigerous punctures.

Aedeagus: in lateral view, parameres elongate and straight, apex slightly ventrally sinuate; in dorsal view, lateral margins of parameres relatively parallel, apex strongly notched on apico-internal angle, left process shorter.

Female

Measurements ♀: length: 9.5–11 mm, width: 5–5.5 mm.

Differs from ♂ by: larger; laterally more convex and abdomen convex; no spinose process on second and third abdominal ventrites; antennae with club as long as funicle; pygidium slightly projecting postero-ventrally and not surpassing apex of elytra; protibiae narrower with apical teeth longer.

DERIVATIO NOMINIS.

The name is formed from the suffix “ oides ” menaing “similar to” and “ depressus ”. It refers to the similarity with A. depressus Frey, 1973 .

DISTRIBUTION. Known from Zambia.

BIOLOGY. The species was collected in the months of September and October.

DIFFERENTIAL DIAGNOSIS.

Adoretus depressusoides sp. nov. is similar to A. depressus Frey, 1973 but can be distinguished as follows:

A. depressusoides sp. nov. A. depressus ( Figs 52–56).

Aedeagus: in lateral view parameres elongate ventrally Aedeagus: in lateral view parameres shorter, ventrally and dorsally straight, apex ventrally slightly sinuate; in and dorsally straight, apex ventrally slightly sinuate; dorsal view, lateral margins of parameres relatively in dorsal view, parameres triangular and elongate, parallel, posterior margin of parameres complete, apex median part of posterior margin of parameres absent, strongly notched on apico-internal angle, left process apex strongly notched on apico-internal angle, left shorter process shorter

( Figs 49–50). ( Figs 54–55).

Male with a spinose process on second and third Male without a spinose process on second and third abdominal ventrite. abdominal ventrite.