Notes on the systematic placement of Eutheia siamensis Franz (Coleoptera, Staphylinidae, Scydmaeninae) Author Jałoszyński, Paweł text Zootaxa 2015 4021 3 493 498 journal article 10.11646/zootaxa.4021.3.10 03eedc14-3d28-477d-a85e-7ce70cff17ed 1175-5326 236339 5A548CC1-FDDC-487A-8615-AB26129A556C Cephennomicrus siamensis (Franz) ( Figs 1–6 ) Euthia siamensis Franz, 1975 : 52 , fig. 1 ( Euthia Agassiz, 1847 is an unjustified emendation of Eutheia Stephens, 1830 ). Type material. Holotype : THAILAND (Nakhon Ratchasima Province): ♂, three original labels ( Fig. 3 ): "Sakaerat Exp. Stat. / Thailand ,lg.Franz" [white, printed], " Euthia / siamensis m. / det.H.Franz" [white, handwritten and printed], " Typus " [red, handwritten]; during the present study white printed label was added: " CEPHENNOMICRUS / siamensis ( Franz, 1975 ) / det. P. Jałoszyński, 2015 " ( NHMW ). Diagnosis. BL < 0.80 mm ; head with short cushion-like tempora and pair of elongate oblique impressions extending anteromesally from mesal margin of each eye; pronotum with lateral pair of pits and transverse antebasal impression deepened at each end; aedeagus pear-shaped, with nearly symmetrical internal armature composed of elongate sclerites and median tubular component; parameres broad and with apices reaching apex of median lobe. Description. BL 0.78 mm . Body of male ( Figs 1–2 ) elongate and convex, brown, legs and setae slightly lighter. Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.10 mm , HW 0.16 mm ; vertex and frons confluent, weakly convex; frons between eyes with pair of elongate impressions extending anteromesally from mesal margin of each eye and not connecting at middle; eyes bean-shaped, area in posteromedian emargination of each eye bulging and in dorsal view visible as cushion-like protuberance. Punctures and setae on frons and vertex inconspicuous, fine. Antennae short, AnL 0.30 mm ; antennomeres I and II elongate, III–VIII each about as long as broad or slightly transverse; antennomeres IX–XI distinctly enlarged and forming club, antennomeres IX–X distinctly transverse, XI only 1.6× as long as broad, with rounded apex. Pronotum ( Fig. 2 ) semioval in dorsal view, broadest at base; PL 0.20 mm , PW 0.25 mm ; pronotal base with shallow transverse impression deepened at each end and with distinct pair of small lateral pits. Punctures on pronotal disc fine and inconspicuous; setae short, sparse and recumbent. Elytra oval, broadest near middle; EL 0.48 mm , EW 0.33 mm , EI 1.46; humeral calli distinct, subhumeral line rounded but distinct, basal elytral foveae rudimentary, barely discernible. Punctures on elytra similar to those on pronotum; setae short, dense, recumbent. Legs moderately long and slender, all tibiae nearly straight. Aedeagus ( Figs 4–6 ) pear-shaped, AeL 0.15 mm ; median lobe in ventral view broadest in basal half and narrowing distally to form subtrapezoidal apex with nearly straight apical margin; internal armature nearly symmetrical, composed of elongate sclerites and median tubular component; parameres broad and short, in studied specimen setae are broken off, but Franz (1975) illustrated both parameres with two apical and one subapical seta. Female. Unknown. Distribution. North-eastern Thailand .