Lithocharis parvincisa Assing 2015, nov.sp.
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Lithocharis
Lithocharis parvincisa

description: Lithocharis parvincisa nov.sp. (Figs 77-84)
Type material: Holotype ♂: " INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P., February 1985 / human dung baited trap, I. Hanski 920 m / 26.29 / R.Ent.Soc.Lond., Project Wallace, B.M. 1985-10 / Holotypus ♂ Lithocharis parvincisa sp. n. det. V. Assing 2015" (BMNH). Paratypes: 1♀: same data as holotype (BMNH); 2♂♂, 1♀: " INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P., April 1985 / Rothamsted light trap, site 1, 200 m. H. Barlow / R.Ent.Soc.Lond., Project Wallace, B.M. 1985-10" (BMNH, cAss); 1♀: " INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P., April 1985 / Pit fall trap / Plot C, ca 400 m, Lowland forest / R.Ent.Soc.Lond., Project Wallace, B.M. 1985-10" (BMNH); 3♀♀: " INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P., 1985. / ' Edwards' Camp, Lowland forest, 664 m, 26.iv.-4.vi. / Malaise trap / R.Ent.Soc.Lond., Project Wallace, B.M. 1985-10" (BMNH); 1♂: " INDONESIA: SULAWESE UTARA, Dumoga-Bone N.P., May 1985. / 'Clarke' Camp, Lower montane forest, 1140 m / At light / R.Ent.Soc.Lond., Project Wallace, B.M. 1985-10" (cAss).
Etymology: The specific epithet (adjective) is composed of the adjectives parvus (small) and incisus (incised). It alludes to the relatively small posterior incision of the male sternite VIII.
Description: Body length 4.0- 4.7 mm; length of forebody 2.3-2.5 mm. Coloration: head dark-brown to black; pronotum brown to dark-brown; elytra brown; abdomen brown to dark-brown, with the posterior margins of the segments yellowish to yellowishbrown; legs yellowish; antennae reddish.
Head (Fig. 77) weakly transverse, 1.06-1.09 times as broad as long, lateral margins behind eyes subparallel in dorsal view; punctation dense and fine; interstices with shallow microreticulation, glossy (Fig. 78). Eyes large, noticeably longer than postocular region in dorsal view. Antennae approximately 1.7 mm long; preapical antennomeres distinctly oblong.
Pronotum (Fig. 77) approximately as long as broad and as broad as head; anterior angles sharply, posterior angles weakly marked; lateral margins weakly converging posteriad in dorsal view; midline with pronounced impunctate band; punctation dense and fine, slightly more distinct than that of head; interstices without microsculpture (Fig. 79). Elytra (Fig. 77) approximately 1.1 times as long as pronotum; punctation very dense and fine; interstices without microsculpture. Hind wings present. Protarsomeres I-IV weakly dilated. Metatarsomere I approximately as long as the combined length of II and III.
Abdomen narrower than elytra; punctation fine and very dense; interstices with shallow microreticulation; posterior margin of tergite VII with palisade fringe.
♂: sternite VII (Fig. 80) moderately transverse, posterior margin with shallow median excision, this excision with a comb of 20-25 moderately long palisade setae; sternite VIII (Fig. 81) weakly transverse and with unmodified pubescence, posterior incision small and broadly V-shaped; aedeagus (Figs 82-84) approximately 0.8 mm long, without dorso-lateral apophyses; ventral process apically deeply bifid; internal structures of distinctive shapes.
Comparative notes: Regarding its external and male sexual characters, L. parvincisa is similar to the sympatric L. vilis, from which it is distinguished by the shape of the pronotum, the more slender antennae, the less distinctly dilated protarsomeres I-IV, the shorter comb of palisade setae at the posterior margin of the male sternite VII, the less transverse male sternite VIII with a much smaller posterior excision and with unmodified pubescence, and by the smaller aedeagus without dorso-lateral apophyses and with smaller sclerotized internal structures of different shapes.
Distribution and natural history: The type specimens were collected in Dumoga-Bone National Park in Sulawesi Utara (Indonesia: northern Sulawesi) with traps baited with human faeces, with light traps, Malaise traps, and pitfall traps at altitudes of 200-1140 m.
description: Published as part of Assing, Volker, 2015, A revison of the Lithocharis species of the Palaearctic, Oriental and Australian regions (Coleoptera: Staphylinidae: Paederinae: Medonina), pp. 1133-1178 in Linzer biologische Beiträge 47 (2) on pages 1161-1163, DOI: 10.5281/zenodo.5184182