Lesteva (s.str.) aterrima Lohse, 1967

Shavrin, Alexey V. & Zanetti, Adriano, 2021, Review of the genus Lesteva Latreille, 1797 (Coleoptera: Staphylinidae: Omaliinae Anthophagini) of the Iberian Peninsula, Zootaxa 4966 (4), pp. 401-427 : 403-406

Lesteva (s.str.) aterrima Lohse, 1967

( Figs. 1 , 3–5 , 8 )

Lesteva aterrima Lohse, 1967: 10 ; Zanetti 2008: 994, 996

Type material examined. Paratypes: 1 ♂: ‘ Asturies: Covadonga | (Cangas de Onis) | rio Covadonga | VI.1965 G.Fagel’ <printed>, ‘Paratypoid’ <red, handwritten>, ‘Coll. | G. A. Lohse | MHNG-1994’ <printed>, ‘ PARATYPE | Lesteva | aterrima sp. n. | Det. Lohse 1967 ’ <yellow, printed>, ‘MHNG | ENTO | 00087306’ <printed>, ‘ Lesteva (s.str.) | aterrima Lohse, 1967 | Shavrin A.V. det. 2021’ ( MHNG); 1 ♀: same labels, but ‘MHNG | ENTO | 00087307’ <printed> ( MHNG).

Material examined. SPAIN: ASTURIAS: 10 ♂, 8 ♀♀: Puerto de La Cubilla , 1400 m a.s.l. 08.06.1991. P. Wunderle leg. (cA, cW) ; 3 ♂♂, 1 ♀: same data, but L. Zerche leg. (cW, MHNG) ; 1 ♂, 1 ♀: Oviedo, Picos de Europa, Covadonga Lago Enol. 1600 m a.s.l. 03.06.1990 (cZan) ; 1 ♂: Covadonga, Hutte Vega Redonga. 1300 m a.s.l. 07.06.1991. L. Zerche leg. ( MHNG) .

Redescription. Measurements (n=25): HW: 0.68–0.75; HL: 0.47–0.52; OL: 0.24–0.25; LT: 0.07–0.08; AL (holotype): 2.07; PL: 0.75–0.78; PWMax: 0.83–0.87; PWMin: 0.60–0.65; EL: 1.58–1.62; ESL: 1.49–1.52; EW: 1.39–1.42; MTbL (holotype): 1.02; MTrL (holotype): 0.57; AW: 1.35–0.38; AedL: 0.67–0.82; FL: 2.85–2.96; TL: 3.50–4.55 (holotype: 4.45).

Body dark brown, sometimes with paler apical abdominal tergites; antennes and legs yellow-brown; mouthparts and tarsi yellow. Punctation of head very dense, coarse and moderately deep, interspaces between punctures in middle about as long as diameter of one nearest puncture, finer in vertex and finer and denser around eyes; punctation of neck as that of middle portion of head; punctation of pronotum moderately regular, about as that on middle part of head, but slightly deeper, slightly sparser in mediobasal third; scutellum with indistinct, very fine and sparse punctation; punctation of elytra similar to that on pronotum, but sparser, slightly finer and denser in parascutellar portion and along suture; abdominal tergites with very fine and dense punctation. Head and neck with very dense isodiametric microsculpture, distinctly coarser in infraorbital ridges; pronotum with fine, transverse microreticulation except for mediobasal portion; scutellum with very dense, fine meshes; abdominal tergites with distinct transverse microsculpture. Habitus as in Fig. 1 .

Head transverse, 1.4 times as broad as long, distinctly and widely elevated in middle; middle portion separated from lateral portions by wide and deep longitudinal depressions; eyes moderately large, convex, about three times as long as temples (lateral view); distance between ocelli markedly shorter than distance between ocellus and posterior margin of eye. Antennae reaching basal third of elytra when reclined, with moderately elongate antennomeres; basal antennomere disitnctly more than twice as long as wide, 2 slightly narrower than basal antennomere, 3 slightly longer than 2, 4 slightly broader and longer than 3, 5–7 slightly longer and broader than 4, 8–10 slightly shorter than 7, apical antennomere slightly broader than 10.

Pronotum evenly convex, 1.1 times as broad as long, 1.1–1.2 times as broad as head, very wide in apical third, sharply narrowed toward elongate subparallel latero-basal margins; middle portion of pronotum with indistinct, oval and moderately wide paired impressions and without or with indistinct to distinct and deep, transverse impression in mediobasal third.

Elytra somewhat flattened, transverse, longer than broad, slightly less than twice as long as pronotum, significantly widened apicad.

Male. Apical margins of abdominal tergite VIII slightly and sternite VIII concave. Aedeagus with very wide basal portion, significantly narrowed toward very narrow median lobe, with small rounded apex; parameres wide, exceeding apex of median lobe, widened apically, with two long apical and preapical setae; lateral sides of median lobe with several moderately long setae; internal sac without visible sclerotized structures ( Fig. 3 ). Lateral aspect of aedeagus as in Figs. 4–5 .

Female. Apical margins of abdominal tergite VIII and sternite VIII rounded.

Comparative notes. Regarding the general shape of the aedeagus and the presence of a deep concavity between the basal portion, median lobe and the narrow, curved ventral process, L. aterrima is similar to L. benicki Lohse, 1958 , a species distributed in the Alps, and L. martinae Zanetti, 2008 , a species described from central Italy ( Zanetti 2008). Lesteva aterrima differs from these species by the smaller size of the aedeagus, a narrower apical part of the median lobe, and different features of its setation (see Fig. 4 in Zanetti (2008)). Based on the general shape of the body, all three species are similar to L. pubescens , from which they are distinguished by the morphology of the aedeagus.

Distribution. Lesteva aterrima is known from several localities in Cantabrian mountain range, in north-western Spain ( Fig. 8 ).

Natural history. Specimens were collected at elevations from 1300 to 1600 m a.s.l. Some specimens were sifted from wet mosses near streams.

Figures

FIGURE 8. Distribution of Lesteva in the Iberian Peninsula: L. aterrima (stars), L. lusitana (black circles), L. mariei (white circles), L. mateui (black squares), L. osellai (black triangles).

FIGURES 1–2. Habitus of Lesteva: 1–L. aterrima (Spain: Puerto de Cubilla), 2–L. balearica (Spain: Mallorca). Scale bar: 1.0 mm.

FIGURES 3–7. Aedeagus of Lesteva (3–5: L. aterrima (3–4: Spain: Covadonga, 5: Spain: Cubilla)), 6–7: L. balearica (Spain: Mallorca): 3, 6–parameral view, 4–5, 7–lateral view. Scale bar: 0.1 mm.