Lathomicrus sumatranus ( Franz, 1984 ) Franz, 1984

Jałoszyński, Paweł, 2010, Notes on identity of Cephennomicrus sumatranus (Franz) (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 2517, pp. 25-32 : 28-30

Lathomicrus sumatranus ( Franz, 1984) , comb. n.

( Figs. 1 , 3, 5, 7 , 9, 10 )

Neseuthia sumatrana Franz, 1984: 89 ; fixed as the correct original spelling by the first reviser ( Jałoszyński 2008a). Neseuthia sumatrensis ; Franz, 1984: 90 (incorrect original spelling used in legend of Fig. 1 ). Cephennomicrus sumatranus ; Jałoszyński, 2008a: 34.

Type material. Holotype: INDONESIA: ♂, two white typed labels: "Sumatra, Babahrot", "lg.Klapperich, Juli–Aug.1983 ", white label with handwritten " Neseuthia sumatrana m." and printed "det. H. Franz", red handwritten label " Holotypus ", white printed label " LATHOMICRUS sumatranus (Franz) , det. P. JAŁOSZYŃSKI, 2008" ( NHMW).

Diagnosis. The only known species is diagnosable on the basis of generic characters; aedeagus must be examined to confirm identification.

Redescription. BL 0.64. Body of male ( Figs. 1 , 3 ) slender, slightly flattened, sides of pronotum and elytra nearly confluent, pigmentation light brown, vestiture yellowish.

Head moderately large, HL 0.10, HW 0.15, vertex and frontoclypeal area strongly convex and rounded together, eyes large, coarsely faceted and strongly convex; punctures on head very fine but dense, indistinctly marked, barely noticeable at magnification 80x; setae short, dense and nearly recumbent. Antennae as in Fig. 5 , AnL 0.27.

Pronotum ( Fig. 3 ) subrectangular in shape, broadest near anterior fourth, PL 0.17, PW 0.25, anterior margin weakly rounded; lateral margins strongly rounded in anterior fourth, then nearly straight and slightly convergent toward sharp hind angles; posterior margin deeply bisinuate; base of pronotum with distinct broad and deep transverse groove with each end slightly impressed and small fovea near each hind angle. Punctures very dense but very small, moderately sharply marked, noticeable at magnification 40x; setae very dense, short and nearly recumbent.

Elytra ( Fig. 3 ) oval, as convex as pronotum and only slightly broader, broadest distinctly anterior to middle, EL 0.37, EW 0.29, EI 1.27; each humerus with small but distinct humeral denticle and narrow humeral carina slightly longer than half length of elytra; base of each elytron with broad and short impression; basal foveae not discernible; apices of elytra rounded together. Metathoracic wings well developed. Mesoscutellum visible, subtriangular with rounded margins.

Legs ( Fig. 7 ) slender, relatively short.

Ventral view as in Fig. 7 ; metaventrite non-modified, without tubercles or impressions.

Aedeagus ( Figs. 9, 10 ) stout, drop-shaped, AeL 0.12; apex subtriangular, blunt, slightly curved dorsally; internal armature composed of broad median tubular structure; parameres slender, each with two apical setae.

Female. Unknown.

Distribution. Sumatra.

Remarks. The original label reads " Juli–Aug.1983 ", while Franz (1984) gave " 20. August 1983 " as the collecting date.

Figures

FIGURES 1 – 2. Habitus of holotypes, males. 1 ― Lathomicrus sumatranus (Franz); 2 ― Cephennomicrus fesumatranus Jałoszyński, sp. n. Scale bars: 0.2 mm.

FIGURES 3 – 8. Holotype males of Lathomicrus sumatranus (Franz) (3, 5, 7) and Cephennomicrus fesumatranus Jałoszyński, sp. n. (4, 6, 8). 3, 4 ― simplified body outline; 5, 6 ― left antenna in dorsal view; 7, 8 ― simplified ventral view (distal parts of abdomens removed). Abbreviations: bs — basisternum; hc — humeral carina; hy — hypomeron; vp 1 — prosternal process, vp 2 — mesoventral process. Scale bars: 0.2 mm (3, 4, 7, 8), 0.05 mm (5, 6).

FIGURES 9 – 12. Aedeagus of holotype in ventral (9, 11) and lateral (10, 12) views. 9, 10 ― Lathomicrus sumatranus (Franz); 11, 12 ― Cephennomicrus fesumatranus Jałoszyński, sp. n. Scale bars: 0.05 mm.