Granimedon effeminatus, Assing, 2015

Assing, Volker, 2015, Two new genera of Medonina from China and Japan (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 47 (1), pp. 191-206 : 197

Granimedon effeminatus nov.sp. ( Figs 13-20 , Map 1 )

T y p e m a t e r i a l: Holotype 3: " CHINA [17] - Yunnan, S Gejiu, 23°17'14''N, 103°08'41''E, 1860 m, road margin with shrubs, 21.VIII.2014, V. Assing / Holotypus 3 Granimedon effeminatus sp.n. det. V. Assing 2015 " (cAss) . Paratypes: 3♀♀ [1 teneral]: same data as holotype (cAss, MNHUB) ; 4 exs. [2 teneral]: same data, but leg. Schülke (cSch, cAss) .

E t y m o l o g y: The specific epithet (Latin, adjective) alludes to the unmodified male sternite VIII.

D e s c r i p t i o n: Body length 5.0- 5.5 mm; length of forebody 2.7-2.8 mm. Habitus as in Fig. 13 . Coloration: body blackish-brown; legs dark-yellowish; antenna darkreddish, with antennomere I somewhat darker.

Head ( Fig. 14 ) transverse, 1.15-1.20 times as broad as long, with moderately marked posterior angles, posteriorly weakly concave; dorsal surface practically matt, with rather coarse, very dense, umbilicate, and partly confluent punctation ( Fig. 15 ); interstices reduced to narrow ridges. Eyes large and bulging, (nearly) twice as long as postocular region in dorsal view. Antenna ( Fig. 16 ) 1.3-1.4 mm long.

Pronotum ( Fig. 14 ) transverse, approximately 1.2 times as broad as long and approximately as broad as head, widest anteriorly; posterior angles very indistinct, broadly rounded, practically obsolete; punctation very dense and granulose ( Fig. 17 ); dorsal surface nearly matt; midline with very narrow impunctate line of more or less reduced length.

Elytra 1.15-1.20 times as long as pronotum; punctation dense and moderately fine. Hind wings fully developed. Protarsomeres I-IV not dilated. Metatarsomere I longer than II, nearly as long as the combined length of II and III.

Abdomen narrower than elytra; punctation rather dense and very fine; interstices with rather distinct microsculpture; posterior margin of tergite VII with palisade fringe; posterior margin of tergite VIII distinctly convex.

3: sternite VII with truncate posterior margin and with unmodified pubescence; sternite VIII ( Fig. 18 ) oblong and with strongly convex posterior margin; aedeagus 0.6 mm long and shaped as in Figs 19-20.

C o m p a r a t i v e n o t e s: Granimedon effeminatus is distinguished from the similar and geographically close G. anguliceps by the less transverse head with less pronounced posterior angles, the less transverse pronotum, and the larger and differently shaped aedeagus (ventral process apically much more slender in ventral view; internal structures of different shape).

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality is situated to the south of Gejiu in southeastern Yunnan ( Map 1 ). The specimens were sifted from litter, soil, and moss on a grassy slope with shrubs at an altitude of 1860 m. One of the paratypes is teneral.

Figures

Map 1: Distribution of Granimedon: Granimedon creber (open circle); G. effeminatus (filled diamond); G. anguliceps (open triangles).

Figs 13-20: Granimedon effeminatus nov.sp.: (13) habitus; (14) head and pronotum in dorsal view; (15) median portion of head; (16) antenna; (17) median portion of pronotum; (18) male sternite VIII; (19-20) aedeagus in lateral and in ventral view. Scale bars: 13: 1.0 mm; 14, 16: 0.5 mm; 18- 20: 0.2 mm; 15, 17: 0.1 mm.