Granimedon creber, 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 : 200

Granimedon creber nov.sp. ( Figs 21-29 , Map 1 )

T y p e m a t e r i a l: Holotype 3: " CHINA [18] - Yunnan, mts S Jianshui, broad-leaved for., 23°25'20''N, 102°51'05''E, 1890 m, 22.VIII.2014, V. Assing / Holotypus 3 Granimedon creber sp.n. det. V. Assing 2015 " (cAss) . Paratypes: 233 [1 teneral]: same data as holotype (cAss) ; 13, 1 ex. [teneral]: same data, but leg. Schülke (cSch) .

E t y m o l o g y: The specific epithet (Latin, adjective: crowded, densely packed) alludes to the extremely dense punctation of the pronotum.

D e s c r i p t i o n: Body length 4.7-5.5 mm; length of forebody 2.8-2.9 mm. Habitus as in Fig. 21 . Coloration: body blackish-brown; legs brown with yellowish tarsi; antenna reddish, with antennomere I somewhat darker.

Head ( Fig. 22 ) transverse, 1.18-1.20 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. 23 ); interstices reduced to narrow ridges. Eyes large and bulging, approximately twice as long as postocular region in dorsal view. Antenna ( Fig. 24 ) approximately 1.5 mm long.

Pronotum ( Fig. 22 ) transverse, 1.18-1.19 times as broad as long and approximately as broad as head, widest anteriorly; posterior angles very indistinct, broadly rounded, practically obsolete; punctation very dense, granulose, and partly confluent; dorsal surface matt; midline with narrow and very short rudiment of an impunctate line posteriorly.

Elytra approximately 1.1 times as long as pronotum; punctation dense and moderately fine. Hind wings fully developed. Protarsomeres I-IV not dilated. Metatarsomere I longer than II, but shorter than the combined length of II and III.

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

3: sternite VII ( Fig. 26 ) with truncate posterior margin and with unmodified pubescence; sternite VIII ( Fig. 27 ) oblong and with strongly convex posterior margin; aedeagus 0.58 mm long and shaped as in Figs 28-29.

C o m p a r a t i v e n o t e s: Granimedon creber differs from the other two species of the genus by slightly larger body size, the darker coloration of the legs, the even denser punctation of the head and pronotum, the relatively shorter elytra, and by the shape of the aedeagus.

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 in the mountain range to the south of Jianshui in southeastern Yunnan ( Map 1 ). The specimens were sifted from litter in a subtropical broad-leaved forest at an altitude of 1890 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 21-29: Granimedon creber nov.sp.: (21) habitus; (22) head and pronotum in dorsal view; (23) median portion of head; (24) antenna; (25) median portion of pronotum; (26) male sternite VII; (27) male sternite VIII; (28-29) aedeagus in lateral and in ventral view. Scale bars: 21: 1.0 mm; 22, 24, 26-27: 0.5 mm; 28-29: 0.2 mm; 23, 25: 0.1 mm.