Eusclerus sordidus 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 : 1172

Eusclerus sordidus SHARP 1886 ( Figs 5-11 , 25-28 )

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 sordidus . Type D.S. Cubilguitz. Guat. Champion. [written on mounting label] / Cubilguitz, Vera Paz. Champion. / Type / B.C.A. Col. I. 2. Eusclerus sordidus, Sharp. / Sharp Coll. 1905.-313. / Holotypus Eusclerus sordidus Sharp , rev. V. Assing 2011 (BMNH).

C o m m e n t: In the species description of E. sordidus SHARP (1886) does not specify the number of types, but in the description of Eusclerus he refers to the type material of E. rugifrons and E. sordidus as "two unique examples", so that the above type specimen has holotype status.

R e d e s c r i p t i o n: Body length 3.0 mm. Habitus as in Fig. 1 . Coloration: forebody dark reddish-brown; abdomen blackish-brown; legs reddish-yellow; antennae reddish.

Head ( Fig. 6 ) 1.25 times as broad as long; punctation moderately coarse, very dense (interstices reduced to narrow ridges), and largely confluent ( Fig. 7 ). Eyes enormous. Temples short, but visible; posterior angles of head noticeable; posterior margin of head truncate. Mouthparts as in Figs 25-28 .

Pronotum ( Fig. 6 ) approximately 1.05 times as broad as long and strongly convex in cross-section; punctation dense and granulose ( Fig. 8 ); midline with very narrow glossy band posteriorly ( Fig. 8 ).

Elytra broad and moderately long, 1.05 times as long as pronotum ( Fig. 6 ); punctation dense and fine, weakly granulose. Hind wings apparently fully developed. Metatarsus short, metatarsomeres III and IV not oblong.

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

: sternite VII with weakly concave posterior margin; sternite VIII oblong and with small posterior excision ( Fig. 9 ); aedeagus as in Figs 10-11.

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

Figures

Figs 5-11: Eusclerus sordidus SHARP, holotype: (5) habitus; (6) forebody; (7) median dorsal portion of head; (8) median dorsal portion of pronotum; (9) male sternite VIII; (10-11) aedeagus in lateral and in ventral view. Scale bars: 5: 1.0 mm; 6: 0.5 mm; 7-9: 0.2 mm; 10-11: 0.1 mm.

Figs 21-28: Sciocharis buphthalma SCHEERPELTZ (21-24) and Eusclerus sordidus SHARP (25-28): (21, 27) labium; (22, 28) ligula; (23) male sternite VII; (24) male sternite VIII; (25) mandibles; (26) labrum. Scale bars: 23-25: 0.2 mm; 21, 26-27: 0.1 mm; 22, 28: 0.05 mm.

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.