Alevonota calliceroides, Assing, 2019

Assing, Volker, 2019, A revision of the Alevonota species of the Palaearctic region. III Two new species Irom Taiwan, a new combination, a new synonymy, and additional records (Coleoptera, Staphylinidae, Aleocharinae), Linzer biologische Beiträge 51 (1), pp. 235-246 : 239-240

Alevonota calliceroides nov.sp. ( Figs 1-5 )

T y p e m a t e r i a l: Holotype ♂: ̎ TAIWAN, Hualien, Guanyuan, pine forest, sifted, 2459 m, 24°11'22''N, 121°20'22''E, 1.VIII.2018, Hetzel leg. / Holotypus ♂ Alevonota calliceroides sp. n. det. V. Assing 2019̎ (cAss).

E t y m o l o g y: The specific epithet (adjective) alludes to the shape of the antennae, which somewhat resembles that of species of Callicerus GRAVENHORST, 1802.

D e s c r i p t i o n: Body length 4.9 mm; length of forebody 2.2 mm. Habitus as in Fig. 1 . Coloration: body black with dark-brown elytra; legs dark-yellow; antennae blackish-brown.

Head ( Fig. 2 ) approximately 1.05 times as broad as long, broadest across eyes; lateral contours behind eyes converging towards posterior constriction of head in nearly straight line, i.e. posterior angles completely obsolete; dorsal surface with very fine and sparse punctation, narrowly impunctate along middle; interstices glossy, with very shallow traces of microreticulation visible only at high magnification (100 x). Eyes large and bulging, slightly longer than distance from posterior margin of eye to posterior constriction of head in dorsal view. Antenna ( Fig. 3 ) conspicuously long and slender, 1.8 mm long; antennomeres IV-V indistinctly oblong, VI-X approximately as long as broad, and XI elongate, approximately as long as the combined length of IX and X.

Pronotum ( Fig. 2 ) 1.07 times as broad as long and nearly 1.3 times as broad as head,

broadest in anterior half; pubescence of midline directed posteriad; punctation very fine and moderately dense; interstices without appreciable microsculpture, very glossy.

Elytra ( Fig. 2 ) approximately as long as pronotum; punctation dense and fine, but more distinct than that of head and pronotum; interstices without microreticulation. Hind wings fully developed.

Abdomen narrower than elytra; tergites III-V with moderately deep anterior impressions; punctation rather sparse and fine, but distinct; anterior portions of tergites III-VII practically impunctate; tergites III-VI with very shallow transverse microsculpture and very glossy; tergites VII-VIII with more distinct microsculpture composed of short transverse meshes; posterior margin of tergite VII with palisade fringe.

♂: posterior margin of tergite VIII somewhat produced and truncate in the middle; posterior margin of sternite VIII strongly convex; median lobe of aedeagus ( Figs 4-5 ) 0.5 mm long and of robust shape.

♀: unknown.

C o m p a r a t i v e n o t e s: The new species is distinguished from A. taiwanensis PACE, 2009 (male unknown), the only other Alevonota species of similarly large size recorded from Taiwan, by darker coloration (A. taiwanensis: body brown; antennae brown), much longer antennae, a differently shaped head, larger eyes (A. taiwanensis: eyes shorter than postocular region), and practically obsolete microsculpture of the head and pronotum (distinct in A. taiwanensis). For illustrations of A. taiwanensis see PACE (2009).

D i s t r i b u t i o n: The type locality is situated in Taroko National Park, Hualien, Taiwan. The holotype was sifted from litter in a pine forest at an altitude of approximately 2460 m, together with A. taiwanica and the following species.

Figures

Figs 1-10: Alevonota calliceroides (1-5) and A. hetzeli (6-10): (1, 6) habitus; (2, 7) forebody; (3, 8) antenna; (4-5, 9-10) median lobe of aedeagus in lateral and in ventral view. Scale bars: 1, 6: 1.0 mm; 2-3, 7-8: 0.5 mm; 4-5, 9-10: 0.2 mm.