Diversity and taxonomic review of Leptusa Kraatz (Coleoptera: Staphylinidae: Aleocharinae) from Great Smoky Mountains National Park, U. S. A., with descriptions of four new species Author Park, Jong-Seok Author Carlton, Christopher E. Author Ferro, Michael L. text Zootaxa 2010 2662 1 27 journal article 10.5281/zenodo.199052 a07f4b3c-e602-4b4e-95dc-87fef597d912 1175-5326 199052 Genus Leptusa Kraatz, 1856 Leptusa Kraatz, 1856 : 60 ; Fenyes, 1920 : 120 ; Bernhauer & Scheerpeltz, 1926 : 553 ; Smetana, 1973 : 3 ; Lohse, 1974 : 42 ; Moore & Legner, 1975 : 483 ; Seevers, 1978 : 164 ; Pace, 1989 : 25 ; Ashe, 2001 : 366 ; Assing, 2002 : 971 ; Gusarov, 2003: 113; Gusarov & Herman, 2003a : 115 , 2003b: 191; Klimaszewski et al. , 2004 : 3 ; Gouix & Klimaszewski, 2007 : 61 . Type species. Bolitochara pulchella Mannerheim, 1830 ; designated by Gusarov & Herman (2003a) . Diagnosis. The genus Leptusa can be recognized by the following combination of characters: body more or less convex, parallel-sided, pubescent; microsculpture present; hind wings often absent; eye size highly variable but usually small; antennae with 11 antennomeres, thickened toward apex; mandible short, right mandible with internal tooth; distal lobe of galea membranous and pubescent; maxillary palpomere 1 smallest, 2 moderately long, 3 largest, 4 subuliform; ligula narrow and long, not bifid, rounded apically; labial palpi with two apparent articles due to fusion of articles 1 – 2; pronotum usually widest at apical third or anterior half; mesocoxae narrowly separated; mesoventral process longer than metaventral process (approximately 2/3 length of mesocoxae); legs usually short, tarsal formula 4-4-5, first metatarsomere as long as following two articles or slightly longer. Abdominal tergites III – VI with setigerous punctures ( Pace 1989 , Klimaszewski et al. 2004 ). Remarks. All species of Leptusa collected in GSMNP have the following combination of characters: gular sutures widely separated, approximately 1/5 width of head; each side of ventral surface of head with carinae (fading before attaining gular suture or attaining gular suture); labrum bearing 3 pairs of short setae along anterior and lateral margin ( Figs. 2 b – 11b); median area of labium distinctly narrow or lateral areas meeting at middle, and a pair of distal setae present in a longitudinal row; mesoventrite carinate or not (if carinate, then not exceeding 1/2 length of mesoventrite). Abdominal sternites VII of males possess many pores occupying anywhere from anterior one-tenth to anterior half.