Cephennomicrus siamensis Franz
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennomicrus
Cephennomicrus siamensis

description: 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.
description: Published as part of Jałoszyński, Paweł, 2015, Notes on the systematic placement of Eutheia siamensis Franz (Coleoptera, Staphylinidae, Scydmaeninae), pp. 493-498 in Zootaxa 4021 (3) on pages 494-495, DOI: 10.11646/zootaxa.4021.3.10, http://zenodo.org/record/236339