Coimedon dissimilis Assing 2015, nov.comb.
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Coimedon
Coimedon dissimilis

description: Coimedon dissimilis (SHARP, 1874), nov.comb. (Figs 30-42)   
 Lithocharis dissimilis SHARP, 1874: 66 f.   
T y p e m a t e r i a l e x a m i n e d: Holotype 3: " Japan. G. Lewis. 1910-320 / Lithocharis dissimilis. type D.S. / Type H.T. / Holotypus 3 Lithocharis dissimilis Sharp, rev. V. Assing 2015 / Coimedon dissimilis (Sharp), det. V. Assing 2015 " (BMNH).  
 C o m m e n t: The original description is based on "One female specimen, found in a rubbish heap at Nagasaki " (SHARP 1874). An examination of the holotype revealed that it is a male and that it does not belong to Lithocharis.   
R e d e s c r i p t i o n: Body length 4.2 mm; length of forebody 2.2 mm. Head, pronotum, and abdomen black; elytra bicoloured, blackish, with the posterior margin broadly yellowish; legs with the femora dark-brown, the tibiae yellowish-brown, and the tarsi yellowish; antennae reddish.  
Head (Fig. 31) large in relation to body (Fig. 30) and distinctly transverse, approximately 1.3 times as broad as long, broadest across eyes, with distinctly marked posterior angles, and posteriorly weakly concave; dorsal surface with dense, rather coarse, and granulosely umbilicate punctation (Fig. 33); interstices narrow, but noticeable, and without microsculpture. Ventral aspect of head as in Fig. 32. Eyes large and bulging, much longer than postocular region in dorsal view (Fig. 31). Antenna 1.05 mm long and shaped as in Fig. 34.  
Pronotum (Fig. 31) strongly transverse, 1.35 times as broad as long and 0.95 times as broad as head, widest at anterior angles; anterior angles sharply marked, posterior angles very indistinct, broadly rounded; lateral margins weakly concave in dorsal view, with two long and stout black setae, one of them at anterior angles and the other a short distance behind anterior angles, these setae inserting in denticle-shaped lateral projections; punctation dense and coarsely granulose (Fig. 36); interstices narrow, but noticeable, and without microsculpture; midline without impunctate band.  
Elytra (Fig. 30) approximately 1.3 times as long as pronotum; punctation dense and moderately fine. Hind wings fully developed. All tarsi slender with oblong tarsomeres. Metatarsomere I longer than II, but shorter than the combined length of II and III.  
Abdomen narrower than elytra; tergites III-VI and sternites III-VI with distinct anterior impressions; punctation denser and moderately coarse on anterior, sparser and finer on posterior tergites; microsculpture very shallow and composed of scale-shaped meshes; posterior margin of tergite VII with palisade fringe; tergite VIII distinctly oblong and with weakly convex posterior margin.  
3: sternite VII with truncate posterior margin and with unmodified pubescence; sternite VIII (Fig. 42) oblong, longer than tergite VIII, and with weakly convex posterior margin, without posterior excision; aedeagus (Figs 37-38) 0.7 mm long, weakly sclerotized, with apically acute ventral process; internal sac with two long series of dark spines and membranous structures.  
D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality is situated in Kyushu, South Japan. According to the original description, the holotype was collected from a "rubbish heap".
description: Published as part of Assing, Volker, 2015, Two new genera of Medonina from China and Japan (Coleoptera: Staphylinidae: Paederinae), pp. 191-206 in Linzer biologische Beiträge 47 (1) on pages 204-205, DOI: 10.5281/zenodo.5414088