Anchocerus thai, Janák, Jiří, 2017

Janák, Jiří, 2017, Four new species and a new record of Anchocerus from the Oriental region (Coleoptera: Staphylinidae: Staphylininae: Staphylinini: Acylophorina), Zootaxa 4319 (3), pp. 579-589 : 587-589

Anchocerus thai sp. nov.

( Figs. 37–45 )

Type locality. Thailand, Doi Inthanon , ca. 18° 35' N, 98° 29' E.

Type material. Holotype ♂: THAILAND: “ THAILAND, Doi Inthanon, 15.III.1982, G. de Rougemont”, “ Anchocerus sp., det. 1988 G. de Rougemont”, “ Holotypus Anchocerus thai sp. nov., J. Janák det. 2017” ( GROG).

Description. Body length 12.4 mm, forebody length 5.4 mm ( Fig. 37 ). Body black, basal and apical part of first segment of antenna, tarsi, knees and apical part of abdominal segment 7 and 8 reddish brown.

Head ( Fig. 38 ) markedly shorter than wide (R=0.86), distinctly widened behind eyes. Temples longer than eyes (R=1.24). Dorsal macrosetae (one side only): one near antennal base; one medially between eyes; one posteromedially, much closer to neck constriction than to posterior margin of eye; one medially near neck constriction; two laterally on temple, of which one near posterior margin of eye, one near neck constriction. Surface with sparse and fine nonsetiferous punctation. Antennae very slender, fifth segment about twice as long as wide (R=2.16), tenth segment slightly transverse (R=0.90).

Pronotum ( Fig. 38 ) shorter than wide (R=0.88), longer (R=1.41) and wider (R=1.37) than head, with punctation slightly finer than those on head. Dorsal macrosetae (one side only): one medial and two or three lateral. Elytra with dense and coarse punctation, shorter than wide (R=0.84), longer (R=1.09) and wider (R=1.15) than pronotum. Wings well developed. Scutellum with punctation and setae similar to those on elytra. Abdomen with coarse and moderately dense punctation, all tergites with dense transverse microsculpture. Legs densely covered with brown setae, all tibiae with lateral spines.

Male. Sternite 9 ( Fig. 39 ) long, moderately narrowed apically, with numerous long setae at apicolateral portion; tergite 10 ( Fig. 40 ) narrowed apically, with several long setae situated at apical and lateral margins. Aedeagus 1.7 mm long ( Figs 41–45 ); median lobe slender, gradually narrowed apically; paramere very wide, distinctly shorter than median lobe; with a few fine setae at apex, sensory peg setae absent.

Female. Unknown.

Differential diagnosis. Anchocerus thai sp. nov. differs from other Anchocerus species by the wide paramere without sensory peg setae in combination with a markedly transverse head. The new species can be inserted in a key ( Solodovnikov 2008) near Anchocerus birmanus Fauvel, 1905 . From this species and from the geographically close Chinese species from Yunnan with similar body size and distinct punctation on head and pronotum ( A. giganteus Hu & Li 2010 , A. pengzhongi Hu & Li 2012 , A. yunnanensis Hu & Li 2010 ) it differs by the wide paramere without peg setae and orifice. Anchocerus thai sp. nov. differs from A. thailandicus Solodovnikov 2008 , also described from Thailand, by the distinct punctation on the head and pronotum and different shape of the paramere.

Etymology. The specific epithet refers to the type locality.

Distribution. The species is distributed in Thailand.

Bionomics. Nothing is known about the bionomics of the new species.

Figures

FIGURES 37 – 45. Anchocerus thai sp. nov., holotype. 37, habitus; 38, head and pronotum; 39, male sternite 9; 40, male tergites 9, 10; 41, aedeagus ventral; 42, aedeagus lateral; 43 – 44, apical part of paramere ventral; 45, paramere lateral.