Leptusa (Adoxopisalia) pseudosmokyiensis Park & Carlton, new species

(Figs. 1 b, 3a – i, Map 1)

Type material. Holotype: U.S.A.: Tennessee: ɗ, “ USA: TN: Sevier Co. GSMNP Laurel Falls N35°40.808’ 2 April 2007 W83°36.067’ SP1 Litter 2 of 3 -M Gimmel”, “ HOLOTYPE, Leptusa pseudosmokyiensis Park and Carlton, des. 2010” (FMNH). Paratypes (n=2): U.S.A.: Tennessee: ɗ, “ USA: TN: Sevier Co. GSMNP Porters Creek N35°40.790’ 5 April 2007 W83°23.855’ SP2 Litter 3 of 3 -M Gimmel” (GSMNP); ɗ (slide mounted), “ USA: TN: Sevier Co. GSMNP Laurel Falls N35°40.808’ 2 April 2007 W83°36.067’ SP1 Litter 3 of 3 -M Gimmel” (LSAM).

Diagnosis. Leptusa (Adoxopisalia) pseudosmokyiensis may be distinguished from L. (A.) smokyiensis by external morphology. We did not compare genitalia because of the absence of available specimens of L. (A.) smokyiensis . The new species differs from L. (A.) smokyiensis in having distinctively longer antennomeres 4 – 5 (Fig. 3 a), and a short mesoventral carina. Additionally, the mouthparts of L. (A.) pseudosmokyiensis differ from L. (A.) smokyiensis in possessing short (as long as α-, β-, δ-seta) γ-seta on the labial palpi (Fig. 3 d), labrum with more setae (Fig. 3 b), and an incomplete carina on each side of midline of ventral surface of head, fading before attaining the gular suture.

Description of male. Length 2.8 – 2.9 mm. Body blackish brown; antennomeres 1 – 3, 11, mouthparts, legs, and tergites II – V brown (Fig. 1 b). Head somewhat glossy, pubescent, with microsculpture. Antennomeres 1 – 3 elongate, 4 – 5 longer than wide, 6 – 7 subquadrate, and 8 – 10 transverse (Fig. 3 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 8 pairs of long setae, a-seta, b-seta, and many pores (Fig. 3 b). Labium with two distal setae in a longitudinal row, and two pores in median area; a pair of setal pores, 2 pairs of real pores and several pseudopores present in lateral area (Fig. 3 c). Labial palpi bearing 12 seta (a – h, α – δ) (Fig. 3 d). Mentum trapezoidal, bearing 4 pairs of main setae (b, u, v, w), and many pores (Fig. 3 e).

Thorax. Pronotum wider than head, and approximately 1.25 times wider than long; somewhat glossy, pubescent, with microsculpture. Mesoventrite with distinct reticulate microsculpture, and incompletely carinate, reaching 1/3 length of mesoventrite. Metaventrite with setigerous punctures. Elytra approximately 1.49 times longer than wide, and approximately 1.25 times longer than pronotum; latero-posterior margin emarginate, somewhat glossy, and pubescent; setigerous punctures present. Hind wings present.

Abdomen. Abdomen glossy, wider than elytra, widest at abdominal tergites VI – VII. Abdominal tergites VI approximately 1.83 times wider than long; tergites VII with single median elongate tubercle; tergite VIII with posterior margin shallowly emarginate, bearing 4 pairs of main setae, and many additional short setae and pores (Fig. 3 f). Male abdominal sternite VII with many pores in anterior one-tenth; sternite VIII with posterior margin produced, bearing 7 pairs of main setae, and many additional short setae and pores (Fig. 3 g).

Genitalia. Paramere as in Fig. 3 h. Median lobe as in Fig. 3 i.

Female. Unknown.

Distribution. USA: Tennessee. Locations where L. (A.) pseudosmokyiensis has been collected in GSMNP as in Map 1.

Etymology. The specific epithet refers to the superficial similarity of this species to L. (A.) smokyiensis . Habitat. All three specimens of this species were collected by sifting leaf litter in old growth forests. No specimens were collected by sifting and emergence trapping from CWD (decay classes I – V) at the same times and locations.