Lobrathium sororium, Assing, 2010

Assing, Volker, 2010, On the Lathrobiina of Taiwan (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology 60 (2), pp. 301-361 : 342-343

Lobrathium sororium sp. n. ( Figs 155-163 )

Type material:

Holotype ♂: " Taiwan, Kaohsuing [sic] Hsien, Kuanshan trail at Kaunshanchi Riv., 2400 m, 20.VII.93, A. Smetana [ T158 ] / Holotypus ♂ Lobrathium sororium sp. n., det. V. Assing 2010" (cSme) . Paratypes: 5 ♂ ♂, 1 ♀: same data as holotype (cSme, cAss) ; 2 ♀ ♀: " Taiwan, Kaohsiung Hsien, Kuanshan trail above Kaunshanchi Riv., 2550 m, 22.VII.93, A. Smetana [ T160 ]" (cSme) .

Description:

External morphology and coloration as in L. stimulans ( Figs 155-156 ), distinguished only by the sexual characters:

♂: posterior margin of tergite VIII convex, not angled in the middle; sternites V-VIII similar to those of L. stimulans ( Figs 157-158 ); aedeagus with longer and more slender apical lobes ( Figs 159-160 ).

♀: posterior projection of tergite VIII broader, less abruptly narrowed ( Fig. 161 ); posterior margin of sternite VIII less distinctly produced in the middle ( Fig. 162 ); segments IX-X similar to those of L. stimulansstimulans ( Fig. 163 ), but tergite X anteriorly less broad.

Comparative notes:

As can be inferred from the synapomorphically derived conditions of the secondary sexual characters in both sexes, as well as from the similar morphology of the aedeagus, L. sororium is probably the adelphotaxon of L. stimulans . For characters separating both species see the description above.

Etymology:

The specific epithet (Latin, adj.: sisterly) refers to the hypothesised close relationship of this species to L. stimulans .

Distribution and natural history:

Lobrathium sororium was collected in two localities in the Kuanshan , Kaohsiung Hsien, southern Taiwan, at altitudes of 2400 and 2550 m. The type specimens were sifted from leaf litter, moist to wet moss, and other debris along a river bank and in a mixed forest .

Figures

Figs 154-163: Lobrathium stimulans sp. n. (154) and L. sororium sp. n. (155-163): male tergite VIII (154); habitus (155); forebody (156); male sternite VII (157); male sternite VIII (158); aedeagus in lateral and in ventral view (159-160); female tergite VIII (161); female sternite VIII (162); apices of female tergites IX and X (163). Scale bars: 155-156: 1.0 mm; 154, 157-163: 0.5 mm.