Lesteva barguzinica Shavrin, Shilenkov & Anistschenko

Shavrin, Alexey V., Shilenkov, Viktor G. & Anistschenko, Alexander V., 2007, Two new species and additional records of Lesteva Latreille, 1797 from the mountains of South Siberia (Coleoptera: Staphylinidae: Omaliinae: Anthophagini), Zootaxa 1427, pp. 37-47 : 43-44

Lesteva barguzinica Shavrin, Shilenkov & Anistschenko , sp. n.

( Figs. 2 , 11–12 )

Holotype: RUSSIA: Republic of Buryatia: ɗ, “BURYATIA: Barguzinskyi Mts.: left tributary of Shamanka river [15 km SW Barguzin], h= 1800 m, 6.05.1997, deeply under stone near the edge of snow, leg. A. Shavrin“ ( ZIN).

Description. In general appearance highly similar to L. dabanensis . Body length 4.8 mm. Body and legs dark-brown, antennae and palpae lighter. Body and extremities covered by grey setae, on pronotum setae short, but still longer than on head. Punctation on head and pronotum fine and dense, on elytra stronger and sparser. Microsculpture isodiametric on head and scutellum, transverse on abdominal tergites. Habitus as in Fig. 2 .

Eyes developed, prominent. Ocelli very small, poorly visible, partly pigmented. Length / width ratios of antennomeres as follows: I: 10:4; II: 7:2; III: 9:3; IV: 10:3; V: 11:3; VI: 11:3; VII: 11:3; VIII: 10:3; IX: 10:3; X: 8:4; XI: 12:4.

Pronotum relatively feebly heart-shaped, with strong lateral impressions (WP:WH=42:45; WP:LP=42:45; WP:WB=42:31).

Elytra elongated, gradually widened to apex (WE:WP=31:45; LE:WE=89:31).

Length ratios of metatarsal segments: 7:4:4:3:7.

Male. Segments of protarsus widened. Aedeagus ( Figs. 11–12 ) short, with triangular pointed apex, parameres extending well beyond apex of median lobe.

Female unknown.

Comparison. Lesteva barguzinica is in many characters similar to L. dabanensis , but differs in the following characters: the dark colour of the body; elytra longer, feebly widened to apex and covered by long grey setae; punctation of elytra coarser and sparser; the aedeagus is very short. From L. brathinoides and L. sajanensis it is distinguished by the darker coloration, strongly reduced ocelli, and by the shape of the aedeagus.

Etymology. The specific epithet has been derived from the name of the type locality: the Barguzin mountain range.

Figures

FIGURES 1 – 4. Habitus of Lesteva. 1 — L. dabanensis sp. n.; 2 — L. barguzinica sp. n.; 3 — L. sajanensis Zerche; 4 — L. brathinoides Zerche. Scale bar 1.3 mm.

FIGURES 11 – 12. Aedeagus of Lesteva barguzinica sp. n. 11 — ventral view; 12 — lateral view. Scale bar 0.3 mm.