Andrahomanus crassicornis, Kejval & Cz, 2010

Kejval, Zbyněk & Cz, Domažlice, 2010, Taxonomic revision of the genus Andrahomanus (Coleoptera: Anthicidae), Acta Entomologica Musei Nationalis Pragae 50 (1), pp. 167-188 : 171-173

Andrahomanus crassicornis sp. nov.

( Figs. 1–6 , 37 )

Type locality. South Africa, North-West Province, Pilanesberg National Park.

Type material. HOLOTYPE: J, ‘ SOUTH AFRICA, Tr., North-West Province Pilanesberg Nat. Park , // Sept on grasslands, 10.XII.2003, I. Mikó & G. Melika [leg.]’ ( HNHM) . PARATYPES: 2 JJ, same data as holotype ( HNHM, ZKDC).

Description (male, holotype). Body length 3.2 mm. Head and pronotum reddish brown, head slightly darker; elytra dark brown to brown black; legs reddish brown, antennae and palpi reddish.

Head nearly as long as wide, widely rounded posteriorly; posterior temporal angles rounded, at most slightly indicated. Eyes medium-sized, moderately convex. Dorsal surface less glossy, densely punctate; punctation simple, somewhat sparser and finer medially at base. Setation short, appressed, with a few short and inconspicuous erect setae. Antennae rather robust, conspicuously enlarged and flattened in terminal third ( Fig. 1 ); antennomere X transverse, quadrangular, 0.8 times as long as wide, antennomere XI 1.4 times as long as wide.

Pronotum 1.1 times as long as wide, slightly wider than head including eyes, widely rounded anteriorly; pronotal disc convex, dorso-lateral sides rather rounded, their outlines nearly straight and narrowing towards base in dorsal view. Dorsal surface nearly matt, very densely punctate; punctation denser than that on head, punctures larger, shallower and contiguous. Setation as that on head.

Elytra 1.7 times as long as wide, subtruncate apically. Surface less glossy, distinctly punctate; punctation in basal third similar to that on head, becoming finer and sparser towards elytral apices. Setation longer than that on head, mostly appressed to subdecumbent and pale, with very slight indication of silvery setose, transverse band dorso-laterally at about mid-length; erect setae short but rather numerous and more distinct than those on head.

Legs simple; setation short and fine, except apical fringe of stiff setae in meso- and metatibiae.

Abdominal sternum VII slightly angulately produced postero-medially, with small and sharp median protuberance close before posterior margin ( Fig. 2 ). Tergum VII simple, nearly evenly rounded posteriorly. Sternite VIII as in Fig. 3 ; paired prongs wide, simply shaped, rounded apically, bulging and with long setae dorsally along median side and with oblique, densely setose edge ventrally. Tergum VIII rounded and moderately emarginate postero-medially ( Fig. 4 ). Segment IX as in Fig. 5 ; paired apical sclerites of rather complex morphology, well sclerotized, variously lobed, a pair of small median lobes with fringe of short and stiff setae/spines.

Aedeagus as in Fig. 6 ; apical portion of tegmen 0.5 times as long as basal piece, abruptly, strongly narrowed behind mid-length, with rather narrow pointed apex in ventral view.

Variation. Body length (J) 3.1–3.2 mm.

Differential diagnosis. Andrahomanus crassicornis sp. nov. is very closely related to A. scholaris sp. nov. as suggested by nearly the same body form and similarity of all male characters. It differs from the latter species by the nearly matt, very densely punctate dorsal surface of head and pronotum (punctures of pronotum larger, shallower and nearly contiguous), more robust and shorter antennae (cf. Figs. 1 and 31 ) and numerous details in the morphology of abdominal sternum VII, sternite VIII, segment IX and aedeagus (cf. Figs. 2–6 and 32–36 ).

Etymology. Composed from the Latin words crassus (robust) and cornu (horn, antenna); named in reference to the conspicuously robust antennae.

Distribution. South Africa.

Figures

Figs. 1–6. Andrahomanus crassicornis sp. nov., holotype (male): 1 – antenna; 2 – sternum VII; 3 – sternite VIII in dorsal view; 4 – tergite VIII; 5 – segment IX; 6 – aedeagus in ventral (right) and lateral (left) view. Scale = 0.2 mm: A – Fig. 6; B – Fig. 3; C – Fig. 5; D – Figs. 2, 4; E – Fig. 1.

Figs.37–43.Andrahomanus spp., habitus:37 – A. crassicornis sp. nov. (paratype); 38 – A.scholaris sp. nov. (holotype); 39 – A. particularis (Pic, 1932) (lectotype); 40 – A. ovaliceps sp. nov. (holotype); 41 – A. opacus sp. nov. (paratype, Swartbooisdrift); 42 – A. luteipes Pic, 1903 (holotype); 43 – A. sabulicola sp. nov. (paratype, Nyandu sands).

Figs. 31–36. Andrahomanus scholaris sp. nov., holotype (male): 31 – antenna; 32 – sternum VII; 33 – sternite VIII in dorsal view; 34 – tergite VIII; 35 – segment IX; 36 – aedeagus in ventral (right) and lateral (left) view. Scale = 0.2 mm: A – Figs. 31, 34; B – Fig. 32; C – Fig. 35; D – Fig. 36; E – Fig. 33.