Stethusa klimschi (Gusarov, Vladimir I. 2003)
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Ordo: Coleoptera
Familia: Staphylinidae
Genus: Stethusa
Name
Stethusa klimschi Bernhauer, 1909 – Wikispecies link – Pensoft Profile
- Stethusa klimschi Gusarov, Vladimir I., 2003, Zootaxa 239: 21-25.
Materials Examined
Type material.Lectotype of Atheta klimschi (designated by Gusarov (2002 b)), UNITED STATES: Louisiana: St. Landry Parish: ɗ, Opelousas, vi; paralectotype of Atheta klimschi, UNITED STATES: Louisiana: ɗ, Opelousas, vi (FMNH). Lectotype of Atheta sulcata (designated by Gusarov (2002 b)), UNITED STATES: Indiana: Posey Co.: ɗ, 22.iv. 1909 (PURC). Additional material. United States: Louisiana: St. Landry Parish: 2 ɗɗ, Opelousas, v (Klimsch) (FMNH); Mississippi: Warren Co.: 2 ɗɗ, 3 ΨΨ, "·Miss." [Vicksburg (according to Casey locality Code (FitzGerald 1962))] (NMNH (Casey collection)).
Diagnosis
Diagnosis.Stethusa klimschi differs from S. dichroa in the following characters: the lack of subbasal impressions of the terminal antennal article; the apex of median lobe is narrower in ventral view (Figs. 4849; 2930) and straight in lateral view (Figs. 5051; 31 32); the lack of the distal spines of the internal sac (Figs. 54; 3839); the shape of the spermatheca (Figs. 57; 4142); and the lack of a female accessory sclerite.
Stethusa klimschi differs from S. spuriella in having a larger body size; straight apex of the median lobe (in lateral view; Figs. 5051; 6566); and a longer spermatheca (Figs. 57; 70).
Description
Description. Length 3.23.5 mm. Head dark brown, pronotum and abdomen reddish brown to brown, segments 56 darker than the rest of the abdomen; elytra brownish yellow with darker area around scutellum and epipleura, legs brownish yellow, mouthparts and antennae brown, two basal antennal segments yellowish.
Head surface glossy, with weak isodiametric microsculpture, with fine punctation, distance between punctures equals 2 times their diameter. Eyes very large, 3.55 times as long as temples. Antennal article 2 is 1.1 times as long as article 3, articles 46 subquadrate, 710 slightly transverse, article 11 as long as articles 9 and 10 combined. Pronotum transverse, 1.3 times as wide as head, width 0.690.77 mm, length 0.540.61 mm, width to length ratio 1.3; glossy, with weak isodiametric microsculpture; punctation as fine as on head but denser, distance between punctures equal to 12 times their diameter. Elytra much wider (0.860.96 mm) and longer (0.670.74 mm; measured from humeral angle) than pronotum (elytral length to pronotal length ratio 1.2), 1.3 times wider than long, surface glossy, with poorly visible microsculpture; punctation fine and slightly asperate, distance between punctures equals 12 times their diameter. Abdominal terga glossy, with weak microsculpture consisting of transverse waves; with fine punctation, distance between punctures equals 13 times their diameter on terga 35 and 36 times on terga 67. Apical margin of tergum 7 with white palisade fringe. Male tergum 7 with elongate medial tubercle in front of posterior margin. Posterior margin of male tergum 8 with two blunt medial projections and two lateral denticles (Figs. 43, 45). Aedeagus as in Figs. 4856, internal sac without distal spines (Fig. 54). Female without accessory sclerite. Spermatheca as in Fig. 57.
Discussion
Discussion. In my earlier paper (Gusarov 2002 b) I argued that S. klimschi did not belong to Earota because of the narrower mesosternal process, and tentatively placed this species in Atheta. Although in S. klimschi the mesosternal process is indeed narrower than in Earota it is still broader than in Atheta. Stethusa klimschi can be distinguished from Atheta based on additional characters listed in the diagnosis of Stethusa.
Distribution
Distribution.Stethusa klimschi is known from Louisiana, Mississippi and southern Indiana (Fig. 111). Natural History. No information is available.
Taxon Treatment
- Gusarov, Vladimir I.; 2003: A revision of the Nearctic species of the genus Stethusa Casey, 1910 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 239: 21-25. doi
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