Nepalota tuberifera, Assing, 2015

Assing, Volker, 2015, On the Nepalota fauna of China (Coleoptera: Staphylinidae: Aleocharinae: Athetini), Linzer biologische Beiträge 47 (1), pp. 207-248 : 236-237

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Nepalota tuberifera


Nepalota tuberifera nov.sp.

( Figs 106-116 View Figs 106-116 , Map 6 View Map 6 )

Type material: Holotype ♂: " CHINA - Yunnan [CH07-15], Baoshan Pref., Gaoligong Shan , 29 km ESE Tengchong , 24°55'37''N, 98°45'09''E, 2350 m, dev. decid. forest, litter, wood, fungi sifted, 1.VI.2007, M. Schülke / Holotypus ♂ Nepalota tuberifera sp.n. det. V. Assing 2015 " ( cAss). GoogleMaps Paratypes: 4♂♂, 2♀♀: same data as holotype (cSch, cAss); GoogleMaps 1♂: " CHINA: Yunnan, Nujiang Lisu Pref., Gaoligong Shan, E pass 20 km NW Liuku , 25°58'49''N, 98°41'48''E, 3000 m, creek valley with devast. prim. forest, litter & moss sifted, 3.IX.2009, leg. M. Schülke [CH09-25]" (cAss); GoogleMaps 1♂: same data, but leg. Wrase (cSch); GoogleMaps 1♂: " CHINA - Yunnan [CH07-14A], Baoshan Pref., Gaoligong Shan, 33 km SE Tengchong, 2100-2200 m, 24°51'22''N, 98°45'36''E, decid. forest, litter, wood, fungi sifted, 4.VI.2007, M. Schülke " (cSch) GoogleMaps .

Etymology: The specific epithet (Latin, adjective: carrying a protuberance) alludes to the pronounced median granule of the male tergite III.

Description: Body length 3.8-4.8 mm; length of forebody 1.7-2.1 mm. Coloration: head and pronotum blackish-brown to blackish; elytra dark-yellowish to brown, with the scutellar region and the postero-lateral angles diffusely and more or less extensively darker; abdomen dark-brown to blackish-brown, with the posterior margins of the segments reddish; legs dark-yellowish; antennae blackish-brown to blackish, with antennomere I yellowish-brown.

Head ( Fig. 106 View Figs 106-116 ) transverse, approximately 1.1 times as broad as long; dorsal surface with distinct microreticulation; punctation moderately dense and fine. Eyes large, much longer than postocular region in dorsal view. Antenna ( Fig. 107 View Figs 106-116 ) slender, 1.4-1.5 mm long; antennomere IV oblong; preapical antennomeres very weakly transverse or as long as broad; antennomere XI apically acute, longer than the combined length of IX and X.

Pronotum ( Fig. 106 View Figs 106-116 ) approximately 1.2 times as broad as long and 1.3 times as broad as head, without sexual dimorphism; disc with distinct microreticulation; punctation dense and moderately fine, more distinct than that of head.

Elytra ( Fig. 106 View Figs 106-116 ) slightly longer than pronotum; punctation very dense and fine; interstices with microreticulation. Hind wings fully developed.

Abdomen with very shallow transverse microsculpture; punctation sparse and fine; tergites III and VII with sexual dimorphism.

♂: tergite III with pronounced median protuberance at posterior margin ( Fig. 108 View Figs 106-116 ); tergite VII with weakly pronounced median elevation, this elevation with denser punctation and more distinct microreticulation; tergite VIII ( Figs 109, 111 View Figs 106-116 ) with truncate and crenulate posterior margin; sternite VIII ( Fig. 110 View Figs 106-116 ) slightly longer than tergite VIII and strongly convex posteriorly; median lobe of aedeagus ( Figs 112-113 View Figs 106-116 ) approximately 0.55 mm long; ventral process and internal structures of distinctive shapes; paramere longer than median lobe and with moderately slender apical lobe.

♀: tergite VIII ( Fig. 114 View Figs 106-116 ) with moderately convex posterior margin; sternite VIII ( Fig. 115 View Figs 106-116 ) broadly convex posteriorly; spermatheca ( Fig. 116 View Figs 106-116 ) approximately 0.3 mm long.

Comparative notes: This species is characterized particularly by the pronounced protuberance of the male tergite III and the shape of the aedeagus. The similar modifications of the male tergites III and VII, as well as the similar general morphology of the aedeagus suggest that N. tuberifera is closely allied to N. martensi . For characters distinguishing this species from the highly similar N. prominula see the comparative notes in the following section.

Distribution and natural history: The specimens were collected in three localities in the southern Gaoligong Shan, western Yunnan ( Map 6 View Map 6 ), by sifting leaf litter in deciduous and degraded primary forests at altitudes of 2100-3000 m.