Eusclerus rugifrons SHARP 1886

Assing, V., 2011, A revision of Eusclerus SHARP, with a redescription of Sciocharis buphthalma SCHEERPELTZ (Coleoptera: Staphylinidae: Paederinae: Medonina), Linzer biologische Beiträge 43 (2), pp. 1169-1177 : 1171-1172

Eusclerus rugifrons SHARP 1886 ( Figs 1-4 )

Eusclerus rugifrons SHARP 1886: 576 .

T y p e m a t e r i a l e x a m i n e d: Holotype: " Eusclerus rugifrons . Type D.S. Guatemala City Champion. [written on mounting label] / Guatemala City. Champion. / Type / B.C.A. Col. I. 2. Eusclerus rugifrons, Sharp. / Sharp Coll. 1905.-313. / Holotypus Eusclerus rugifrons Sharp , rev. V. Assing 2011 (BMNH).

C o m m e n t: The original description is based on a "unique example", "probably a female" from " Guatemala, near the city (Champion)" ( SHARP 1886).

R e d e s c r i p t i o n: Body length 3.4 mm. Habitus as in Fig. 1 . Coloration: head, pronotum, and abdomen blackish; elytra brown, somewhat paler near posterior margin; legs and antennae dark-reddish.

Head ( Fig. 2 ) 1.12 times as broad as long; punctation coarse and very dense (interstices reduced to narrow ridges), but not distinctly confluent ( Fig. 3 ). Eyes enormous. Posterior outline of head behind eyes evenly convex in dorsal view.

Pronotum ( Fig. 2 ) approximately as broad as long and strongly convex in cross-section; punctation dense and granulose ( Fig. 4 ); midline with distinct, moderately narrow glossy band posteriorly ( Fig. 4 ).

Elytra long, 1.05 times as long as, and much wider than pronotum ( Fig. 2 ); punctation dense and fine, not granulose. Hind wings apparently fully developed. Metatarsus slen- der, metatarsomeres III and IV distinctly oblong.

Abdomen widest at segment V; posterior margin of tergite VII with palisade fringe.

: unknown.

D i s t r i b u t i o n: Eusclerus rugifrons has become known only from the type locality in Guatemala.

Figures

Figs 1-4: Eusclerus rugifrons SHARP, holotype: (1) habitus; (2) forebody; (3) median dorsal portion of head; (4) median dorsal portion of pronotum. Scale bars: 1: 1.0 mm; 2: 0.5 mm; 3-4: 0.2 mm.