Cephennomicrus transkeianus Jałoszyński, 2013, sp. n.
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennomicrus
Cephennomicrus transkeianus

description: Cephennomicrus transkeianus sp. n.
(Figs. 15, 20–21, 26–27, 29)
Type material. Holotype: REPUBLIC OF SOUTH AFRICA (Eastern Cape Prov.): 3, three labels: "Transkei: coast / Dwesa forest / 32.15S - 28.49E " [white, printed]; " 11.12.1979; E-Y: 1697 / sifted forest litter / leg. Endrödy- Younga" [white, printed]; " CEPHENNOMICRUS / transkeianus m. / det. P. Jałoszyński, '13 / HOLOTYPUS' [red, printed] (TMSA). Paratypes: 1 3, 2 ƤƤ, same data as for holotype, except for a yellow " paratypus " label (TMSA, MNHW, cPJ).
Diagnosis. Elytral apices modified, each in subapical part slightly flattened and bearing large but shallow arcuate impression with small tubercle on its posterior margin; aedeagus with gradually narrowing apical region; internal armature with sub-hexagonal subapical central complex; each paramere with one broadened and hyaline seta.
Description. Body of male (Fig. 15) moderately strongly convex, elongate, distinctly constricted between pronotum and elytra, brown with slightly lighter appendages, covered with yellowish vestiture. BL 0.98 mm.
Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.10–0.11 mm, HW 0.23 mm; vertex and frons confluent, non-modified, in median part only slightly convex; frontoclypeal region anterior to eyes subtrapezoid; supraantennal tubercles only slightly raised but distinct; punctures on head dorsum very fine, inconspicuous; setae short and sparse but well-visible, recumbent. Antennae moderately long and slender, AnL 0.38, with two distal antennomeres distinctly enlarged and forming elongate club; antennomeres I and II strongly elongate; III–VII each slightly elongate; VIII about as long as broad; IX as long as broad; X slightly transverse; XI 1.2x as long as broad, only slightly broader than X.
Pronotum subtrapezoid, broadest near anterior third; PL 0.31–0.33 mm, PW 0.34–0.35 mm. Anterior margin strongly arcuate; anterior corners broadly rounded and indistinct; lateral margins S-shaped, shallowly concave in posterior third, distinctly microserrate, strongly converging towards obtuse but sharply marked hind pronotal corners; posterior margin shallowly bisinuate; base of pronotum without transverse groove, with two pairs of large and deep lateral and sub-lateral ante-basal pits. Punctures on pronotal disc more distinct than those on frons and vertex, small but dense, separated by spaces shorter than puncture diameters; setae moderately short, sparse, recumbent.
Elytra about as convex as pronotum, oval, broadest near anterior third; EL 0.55 mm, EW 0.43 mm, EI 1.29; humeral calli well-marked, each delimited from adsutural region by sharply marked subhumeral groove extending from elytral base latero-caudad to nearly anterior fourth of EL; basal elytral fovea well-visible in small but deep basal impression; apical region of each elytron modified, in subapical part slightly flattened and bearing large but shallow impression with small tubercle on its posterior margin, so that the shape of impression is arcuate; each impression is adjacent to elytral suture and distant from elytral apex. Vestiture uniform, composed of similar setae as those on pronotum; punctures similarly dense as those on pronotum but much shallower, indistinct. Hind wings well developed.
Legs moderately long and slender; pro- and metatibiae nearly straight, mesotibiae slightly recurved.
Aedeagus (Figs. 20–21, 26–27) stout; AeL 0.15 mm; median lobe in ventral view with gradually narrowing apical part, apex triangular and pointed; internal armature simple, with subapical, darkly sclerotized and approximately hexagonal central complex; parameres slender, each with only one strongly thickened, hyaline apical seta.
Female. Similar to male except for non-modified, evenly convex subapical region on elytra; BL 0.94–0.98 mm; HL 0.10–0.11 mm, HW 0.23 mm, AnL 0.38 mm; PL 0.30–0.33 mm, PW 0.35 mm; EL 0.53–0.55 mm, EW 0.41–0.43 mm, EI 1.24–1.33.
Distribution. Eastern RSA, Eastern Cape Prov. (Fig. 29).
Etymology. Locotypical, after the Transkei region.
Remarks. The aedeagus of Cm. transkeianus is similar to that of Cm. macrocephalus Jałoszyński, 2010c (from Palawan Is., Philippines) in the general shape of the median lobe (except for the shape of its apical part and number of parameral setae) and the subapical placement of somewhat similar central component of the internal armature. However these two species differ significantly at the first sight and cannot be confused; Cm. macrocephalus has long and sparse macrosetae on the pronotum and elytra (absent in Cm. transkeianus) and a clearly different body shape. Similar broadened and hyaline apical parameral setae can be seen also in Cm. taitungensis Jałoszyński, 2009b from Taiwan; also this species has the aedeagus similar in shape to that of Cm. transkeianus. However, the modified apical parameral setae in Cm. taitungensis are accompanied by two non-modified subapical setae, other differences in the structures of the aedeagus are also clear and the general appearance of both species is remarkably different (see Jałoszyński 2009b; Fig. 38).
See also Remarks for Cm. endroedyi.
description: Published as part of Jałoszyński, Paweł, 2013, The first record of the tribe Cephenniini in South Africa, with new species of Cephennomicrus Reitter and Cephennodes Reitter (Coleoptera: Staphylinidae: Scydmaeninae), pp. 411-426 in Zootaxa 3683 (4) on pages 422-423, DOI: 10.11646/zootaxa.3683.4.5, http://zenodo.org/record/222164