Dudleyellus angusticeps, Bellmann, 2012

Bellmann, A., 2012, A new species of Dudleyellus BORDAT 2009 from East Africa (Coleoptera: Scarabaeidae, Aphodiinae), Linzer biologische Beiträge 44 (2), pp. 1041-1044 : 1041-1042

Dudleyellus angusticeps nov.sp. ( Fig. 1-4 )

M a t e r i a l: Holotype: Kenya Eastern, E 729, Sosoma 202 km E of Thika, 20.11.2007 leg. Snizek / Dudleyellus angusticeps sp.n . HOLOTYPE det. A. Bellmann 2012 ( CAB) ;

Paratypes: same Data as Holotype, 3 exs. ( CAB); Kenya Eastern , E of Nguni, Ngomeni, 20.04.2007 leg. Snizek, 1 ex. ( CAB); E. Kenya, Mwingi, Nguni env., 26.11.1999 M. Saŕžek lgt., 3 exs. ( CMR, CPB) .

E t y m o l o g y. The name is derived from the latin words angusti = narrow and ceps = head. The new species is distinguished from other species of the genus by its narrow head.

D e s c r i p t i o n. 4.5-5.5 mm. Body elongate, convex. Dorsal surface with weak, transverse, sometimes almost obsolete microreticulation, moderately shiny. Elytra apically and laterally with short setae. Colour of body piceous to black, legs reddish brown.

M a l e. Habitus as in Fig. 1 . Head narrow, without tubercles; anterior margin of clypeus denticulate laterally, strongly sinuate in the middle; sides of head nearly straight to genae ( Fig. 4 ). Genae nearly angulate; eyes feebly protruding. Frontal suture finely impressed. Punctation simple, with regularly distributed punctures, interstices 1-3 times as wide as diameter of punctures.

Pronotum transverse, anterior angles rounded and feebly protruding. Sides subparallel, posterior angles truncate, feebly sinuate. Basal margin slightly protruding posteriorly, weakly sinuate on either side. Lateral margins complete, basal margin on sides distinct, in the middle not bordered, anterior border lacking. Lateral and basal margins without any setae. Punctation simple with regularly distributed punctures, interstices 1-3 times as wide as diameter of punctures, in basal half medially with a short glabrous line. Laterally with double punctation.

Scutellum triangular, basally with several setigerous punctures.

Elytron long, 1.2-1.3 times as long as combined width of elytra, widest at middle. Humerus with denticle. Striae narrow, moderately deep and strongly crenulate. Punctation of intervals slightly finer and sparser that that of head and pronotum; intervals feebly convex, laterally and basally with a row of setigerous punctures.

Protibiae of normal shape, externally with three triangular teeth and 8-12 small denticles, apical spur acuminate, slightly curved ventrad. Protibia punctured in both sexes. First metatarsomere longer than the following three combined, nearly as long as the following four combined, distinctly longer than superior spur.

Metasternal plate feebly concave, shiny, very finely microreticulated, with some irregular punctures, marginal punctures with few short depressed setae, medial with distinct impressed line.

Aedeagus as in Fig. 2 and 3.

F e m a l e. Punctation of pronotum finer and sparser, interstices 2-5 times as wide as diameter of punctures.

Metasternal plate feebly convex, shiny, very finely microreticulated, with some irregular punctures, medial with weakly impressed line, glabrous.

D i a g n o s i s Dudleyellus angusticeps nov.sp. is most similar to D. desaegeri ( BORDAT 1996) . It differs from the latter in basal border and punctation of pronotum, in the male genitalia and in the shape of the head. Both species are easily separated using the following key.

Figures

Fig. 1-4: Dudleyellus angusticeps nov.sp.: (1) facies (male); (2) aedeagus (lateral view); (3) aedeagus (ventral view); (4) head (male).