On some Acanthoglossa and Hypomedon species II. Two new species, a new synonymy, and additional records (Coleoptera: Staphylinidae: Paederinae) Assing, Volker Linzer biologische Beiträge 2016 2016-07-30 48 1 317 325 6MR4F Assing, 2016 Assing 2016 [178,423,469,491] Insecta Staphylinidae Hypomedon Animalia Coleoptera 7 324 Arthropoda species bicornutus sp. nov.  ( Figs 18-21)  Type material:  Holotype ♂: " LAOS-NE, Xieng Khouang prov., ~ 19°37-8'N 103°20'E, Phonsavan(  30 kmNE): Phou Sane Mt., ~  1400-1500 m,  10-30.v.2009, Z. Krausleg. / Holotypus ♂   Hypomedon bicornutus sp.n.det. V. Assing2016" ( NHMB).  Etymology: The specific epithet (Latin, adjective: with two horns) alludes to the deeply bifid ventral process of the aedeagus.  Description: Body length 3.3 mm; length of forebody 1.9 mm. Coloration: body dark-brown; legs brown; antennae with antennomeres I-II brown and antennomeres III-XI pale-brown. Head ( Fig. 18) 1.1 times as broad as long; punctures large, but shallow, very dense, and umbilicate; interstices without microsculpture. Eyes approximately half as long as postocular region in dorsal view. Antenna: antennomere III approximately as broad as long; antennomeres IV-X of gradually increasing width and increasingly transverse; X approximately 1.5 times as broad as long. Pronotum ( Fig. 18) 1.06 times as broad as long and approximately as broad as head; punctation very dense, umbilicate, and shallow; punctures smaller than those of head; interstices without microsculpture. Elytra ( Fig. 18) approximately 1.05 times as long as pronotum; punctation very dense and fine; interstices without microsculpture. Abdomen narrower than elytra; punctation extremely dense and extremely fine on all tergites; interstices with microsculpture; posterior margin of tergite VII with palisade fringe. ♂: sternite VII unmodified; sternite VIII ( Fig. 19) weakly transverse and with shallow posterior excision; aedeagus ( Figs 20-21) 0.5 mmlong; ventral process distinctly bifid; internal structures of distinctive shapes.  Comparative notes:  Hypomedon bicornutusis distinguished from  H. debilicornis,  H. galilaeus, and  H. nasutusby the absence of microsculpture on the head and pronotum, denser punctation of the forebody, much denser and finer punctation of the abdomen, the shape of the male sternite VIII, and by the completely different morphology of the aedeagus (ventral process bifid; internal structures large and distinctly sclerotized). In fact, the species differs so significantly from other  Hypomedonspecies that it is attributed to this genus with some doubt.  Distribution: The typelocality is situated 30 kmto the northeast of Phonsavan, North Laos, at an altitude of 1400-1500 m. 3831015312 2009-05-10 2009-05-30 2009-05-10 NHMB Z. Kraus LAOS-NE V. Assing 1450 19.6167 Phou Sane Mt. 103.333336 Phonsavan 7 324 1 1 Xieng Khouang prov. holotype