Lobrathium coalitum, Assing, 2010

Assing, Volker, 2010, On the Lathrobiina of Taiwan (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology 60 (2), pp. 301-361 : 358-359

Lobrathium coalitum sp. n. ( Figs 235-243 )

Type material:

Holotype ♂: " Taiwan, Nantou Hsien, Nenkaoshan , 2.5 km SW Tenchi Hut, 2720 m, 6. V.92, A. Smetana [ T115 ] / Holotypus ♂ Lobrathium coalitum sp. n., det. V. Assing 2010" (cSme) . Paratypes 3 ♂ ♂, 2 ♀ ♀: same data as holotype (cSme) ; 3 ♂ ♂: " Taiwan, Nantou Hsien, Nenkaoshan, Tenchi Hut , 2900 m, 5. V.92, A. Smetana [ T114 ]" (cSme); 1 ♂: " Taiwan, Nantou Hsien, Nenkaoshan, 1.5 km SW Tenchi Hut, 2830 m, 6. V.92, A. Smetana [ T116 ]" (cSme) .

Description:

Habitus and forebody as in Figs 235-236 . External characters as in L. spoliatum , distinguished only by the sexual characters:

♂: posterior margin of tergite VIII weakly convex, in the middle indistinctly concave; sternite VII very shallowly impressed in the middle, posterior margin weakly concave; sternite VIII posteriorly

broadly impressed, this impression with subcircular to hexagonal cluster of peg-setae, posterior excision broadly concave ( Fig. 237 ); aedeagus of characteristic morphology, apical lobes fused apically ( Fig. 238-240 ).

♀: posterior margin of tergite VIII moderately convexly produced ( Fig. 241 ); sternite VIII not oblong, posterior margin moderately produced and in the middle briefly concave ( Fig. 242 ); lateral sclerites of tergite IX narrowly separated anteriorly; tergite X obtuse anteriorly, reaching anterior margin of tergite IX, very slender and acute apically ( Fig. 243 ).

Comparative notes:

From other representatives of the L. stimulans group, L. coalitum is readily separated by the morphology and chaetotaxy of the male sternite VIII, the conspicuous shape of the aedeagus, as well as by the shape of the female tergite and sternite VIII.

Etymology:

The specific epithet (Latin, adjective: fused) alludes to the apically fused apical lobes of the aedeagus.

Distribution and natural history:

The species is known only from the Nenkaoshan, Nantou Hsien, central Taiwan, where the type specimens were sifted from leaf litter, moss, bamboo, and other debris in primary fir forests at altitudes of 2720-2900 m .

Figures

Figs 234-243: Lobrathium kuanicum sp. n. (234) and L. coalitum sp. n. (235-243): female tergites IX-X (234, 243); habitus (235); forebody (236); male sternite VIII (237); aedeagus in lateral and in ventral view (238-239); apex of aedeagus in ventral view (240); female tergite VIII (241); female sternite VIII (242). Scale bars: 235-236: 1.0 mm; 234, 237-243: 0.5 mm.