Leptusa (Eucryptusa) brevicollis Casey, 1893

Park, Jong-Seok, Carlton, Christopher E. & Ferro, Michael L., 2010, 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, Zootaxa 2662, pp. 1-27 : 18-20

Leptusa (Eucryptusa) brevicollis Casey, 1893

( Figs. 1 h, 9a – l, Map 1)

Leptusa brevicollis Casey, 1893: 363 ; Fenyes, 1920: 123; Bernhauer & Scheerpeltz, 1926: 554; Moore & Legner, 1975: 483; Pace, 1989: 116; Gusarov, 2003: 116; Klimaszewski et al., 2004: 18; Klimaszewski et al., 2005: 46; Klimaszewski et al., 2007: 814, 826; Gouix & Klimaszewski, 2007: 63.

Leptusa laticollis Notman, 1921: 153 ; Bernhauer & Scheerpeltz, 1926: 554; Moore & Legner, 1975: 483; Pace, 1989: 11; Gusarov, 2003: 116 (as a synonym of L. brevicollis ).

Material examined (n=2). U.S.A.: North Carolina: Haywood Co.: ɗ, Ψ (slide mounted), GSMNP, nr. Purchase Gap house, 35°35.3’ N 83°4.5’ W, flight intercept, 23 – 27 June 2007, LSAM Team ( LSAM).

Redescription. Length 2.1 – 2.9 mm. Body brown, glossy, head somewhat darker; abdominal tergite VII blackish brown; antenna, mouthparts, and legs yellowish brown ( Fig. 1 h). Head pubescent, with microsculpture. Antennomeres 1 – 3 elongate, 4 subquadrate, 5 – 10 transverse ( Fig. 9 a). Carina on each side of ventral surface of head incomplete, fading before attaining gular suture.

Mouthparts. Labrum transverse, bearing 3 pairs of short setae, and 7 pairs of long setae, a-seta, b-seta, and many pores ( Fig. 9 b). Labium with two distal setae in a longitudinal row, and several pores in median area; a pair of setal pores, 2 pairs of real pores and several pseudopores present in lateral area ( Fig. 9 c). Labial palpi bearing 12 setae (a – h, α – δ), γ-seta close to f-seta ( Fig. 9 d). Mentum trapezoidal, bearing 4 pairs of main setae (b, u, v, w), 5 additional setae, and many pores ( Fig. 9 e).

Thorax. Pronotum approximately 1.35 times wider than long; pubescent, with microsculpture. Mesoventrite with distinct reticulate microsculpture. Metaventrite with setigerous punctures. Elytra wider than pronotum and abdomen, approximately 1.72 times longer than wide, approximately 1.63 times longer than pronotum, latero-posterior margin emarginate, pubescent, setigerous punctures present. Hind wings present.

Abdomen. Abdominal tergites VI approximately 1.39 times wider than long. Male abdominal tergite VII with single median elongate tubercle; tergite VIII with posterior margin rounded, bearing 4 pairs of main setae, and many additional short setae and pores ( Fig. 9 f). Male abdominal sternite VII with many pores in anterior one-half; sternite VIII with posterior margin rounded, bearing 7 pairs of main setae, and many additional short setae and pores ( Fig. 9 g). Female abdominal tergite VIII bearing 4 pairs of main setae, and many additional short setae and pores ( Fig. 9 h). Female abdominal sternite VIII with posterior margin rounded, bearing 6 pairs of main setae, and many additional short setae and pores ( Fig. 9 i).

Genitalia. Paramere as in Fig. 9 j. Median lobe as in Fig. 9 k. Spermatheca as in Fig. 9 l.

Type locality. Pennsylvania.

Distribution. CANADA: New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec; USA: Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Vermont, Virginia. Locations where L. (E.) brevicollis has been collected in GSMNP as in Map 1.

Habitat. Specimens examined were collected with a flight intercept trap from secondary forest.

Figures

FIGURE 1. Habitus of Leptusa. a: Leptusa (Adoxopisalia) opaca Casey; b: L. (A.) pseudosmokyiensis sp. nov.; c: L. (A.) smokyiensis Pace; d: L. (A.) stocksi sp. nov.; e: L. (Dysleptusa) carolinensis Pace; f: L. (D.) gimmeli sp. nov.; g: L. (D.) pusio (Casey); h: L. (Eucryptusa) brevicollis Casey; i: L. (E.) ferroi sp. nov.; j: L. (Ulitusa) cribratula (Casey). Scale bars = 1 mm.

FIGURE 9. Details of Leptusa (Eucryptusa) brevicollis Casey. a: antenna; b: labrum; c: labium; d: labial palpus; e: mentum; f: male abdominal tergite VIII; g: male abdominal sternite VIII; h: female abdominal tergite VIII; i: female abdominal sternite VIII; j: paramere; k: median lobe; l: spermatheca. Scale bars = 0.1 mm.