Lesteva (s.str.) osellai Zanetti & Shavrin, 2021

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 : 419-420

Lesteva (s.str.) osellai Zanetti & Shavrin , sp.n.

( Figs. 8 , 29–30 , 32–37 )

Type material examined. Holotype, ♂: ‘ Portugal | Estrela m 1950 |10.vii.[19]79 | Osella’, ‘ HOLOTYPE | Lesteva (s.str.) | osellai sp.n. | Zanetti A. & Shavrin A.V. des. 2020’ <red, printed> ( MCSNV).

Paratypes: 23 ♂♂ (three specimens dissected): ‘Portugal | Estrela m 1950 | 10.vii.[19]79 Osella’ <handwritten> (2 ♂♂: cZan, 21 ♂♂: MCSNV); 1 ♂ (dissected): ‘Portugal | Estrela 1950 | m 10-VII-79 | Osella’ <handwritten>, ‘ Lesteva [handwritten] | prope [handwritten] | lusitana [handwritten] | det. A. Zanetti 197’ <printed>, ‘ Lesteva | lusitanica Lohse | Det. Lohse’ <printed>, ‘Coll. | G.A. Lohse | MHNG-1994’ <printed> ( MHNG); 1 ♂ (dissected; right antennomeres 10-11 missing): ‘Portugal | Estrela 1950m | 10.VII.1979 | Osella’<handwritten> (cSh); 1 ♂ (aedeagus mounted), 31 ♀♀ (two specimens without head and pronotum): ‘Portugal | Estrela 1950 | m 10.VII.[19]79 | Osella’<handwritten> (1 ♀: cZan, 30 ♀♀: MCSNV); 2 ♂♂, 1 ♀: ‘Espagne | Picos de | Europa’ <handwritten>, ‘Covadonga | Lago Enol | 1600 m. 3.VI.90’<handwritten> (1 ♂, 1 ♀: cZan; 1 ♂: cSh); 1 ♀ (pronotum and mediobasal portion of left elytron damaged): ‘Espagne | Picos de Europa | (Oviedo)’ <handwritten>, ‘Covadonga | Lago Enol | 1200 m 2.VI.[19]90’ <handwritten> (cZ); 1 ♀: ‘E Cord.Cantabrica |Pto. de Cubilla | 1400m Spritzmoos | 08.06.[19]91 [P.] Wunderle’ <printed>, ‘ Lesteva [handwritten] | det.P.Wunderle’ <printed>, ‘?coiffaiti’ <handwritten> (cW); 1 ♂ (aedeagus glued on the same card under the specimen): ‘Pto. de Pajares, | Spain. | G. C. C.’ <printed>, ‘coiffaiti [handwritten] | det.Dr.G.A.Lohse 197’ <printed>, ‘Coll. | G.A. Lohse | MHNG-1994’ <printed> ( MHNG); 1 ♀ (without left antennomeres 3-11 and right antenna, without apical part of the abdomen): ‘ SPAIN.Leon, | Pto. de Tarna, | 17km.N.Riano, | 1490m, 1.vii.1965 ’ <printed>, ‘Headwaters Rio Nalon.’ <printed>, ‘Among stones and | grit: fast stream.’ <printed>, ‘J.Balfour-Browne. | B.M. 1965-461.’ <printed>, ‘coiffaiti [handwritten] | det.Dr.G.A.Lohse 19’ <printed>, ‘Coll. | G.A. Lohse | MHNG-1994’ <printed> ( MHNG). All paratypes with additional red printed labels: ‘ PARATYPE | Lesteva (s.str.) | osellai sp.n. | Zanetti A. & Shavrin A.V. des. 2020’.

Description. Measurements (n=50): HW: 0.67–0.80; HL: 0.52–0.60; OL: 0.18–0.25; LT: 0.10–0.12; AL (mean): 2.38; PL: 0.72–0.85; PWMax: 0.82–0.97; PWMin: 0.60–0.70; EL: 1.50–1.80; ESL: 1.35–1.60; EW: 1.27–1.57; MTbL: 1.02; MTrL: 0.47; AW: 1.22–1.57; AedL: 0.77–1.02; FL: 3.15–3.35; TL: 4.10–5.05 (holotype: 4.10).

Body brown, with paler elytra and apical abdominal tergites in some specimens; antennae and legs yellow-brown; mouthparts and tarsi yellow. Punctation of head dense, moderately coarse and deep, sparser in middle, and slightly finer around eyes (some paratypes from Spain with oval impunctate portion between ocelli); punctation of neck as that of head, with impunctate longitudinal band in middle; punctation of pronotum usually coarser and deeper than that of head, sometimes deeper and coarser in medioapical third, finer and sparser in middle and mediobasal third (some paratypes from Estrela with indistinct impunctate longitudinal band); scutellum with several fine punctures; punctation of elytra similar to that on pronotum, but sparser, slightly finer and denser in parascutellar portion and finer and sparser along suture; abdominal tergites with fine, moderately dense, and sometimes indistinct punctation. Body glossy, mostly without microsculpture; basal portion of neck with coarse, dense, isodiametric sculpture, basal portion of scutellum with fine transverse meshes, abdominal tergites with distinct transverse microsculpture on tergites IV–VI and finer, isodiametric microreticulation on tergites VII–VIII. Forebody covered with dense and moderately long semierect setation; abdomen with fine and dense setae. Habitus as in Figs. 29–30 .

Head 1.2–1.3 times as broad as long, distinctly elevated in middle; middle portion separated from lateral portions by deep longitudinal depression, markedly deeper between middle length of eyes; eyes large and convex, about twice as long as temples (lateral view), gradually narrowing toward neck; ocelli large, distance between ocelli subequal to distance between ocellus and posterior margin of eye. Antennae moderately short, reaching basal portion of elytra when reclined, with slightly thickened and moderately short antennomeres 4–10; basal antennomere about twice as long as wide, 2 about half as wide as basal antennomere, 3 slightly longer than 2, 4 slightly broader and longer than 3, 5–7 slightly longer than 4, 8–10 slightly shorter and broader than 7, apical antennomere about 1.3 times as long as 10, in apical third sharply narrowed toward apex.

Pronotum convex, slightly broader than long and head, widest slightly before middle, from their widely rounded lateral margins gradually narrowed toward subparallel latero-basal margins, with obtuse hind angles; mediobasal third of some paratypes with distinct, transverse, moderately deep impression.

Elytra distinctly convex, slightly longer than broad, twice as long as pronotum, slightly widened toward hind angles; apical margins widely rounded; mediobasal surface of elytra in some paratypes with indistinct depression.

Metatarsus more than twice as long as metatibia, with basal metatarsomere about as long as combined length of tarsomeres 2–3 and about as long as apical tarsomere.

Abdomen slightly narrower or about as broad as elytra, with paired tomentose spots in the middle of abdominal tergites IV and V, more transverse in tergite IV, smaller and round in tergite V, with distinct narrow palisade fringe on apical margin of abdominal tergite VII.

Male ( Fig. 29 ). Apical margins of abdominal tergite VIII slightly and sternite VIII deeply concave. Aedeagus with wide basal portion, gradually narrowed toward moderately narrow, long median lobe, in apical third sharply narrowed toward subacute apex; parameres narrow, slightly reaching apex of median lobe, with four short apical setae; internal sac moderately wide and long ( Figs. 32, 34, 36 ). Lateral aspect of aedeagus as in Figs. 33, 35, 37 .

Female ( Fig. 30 ). Apical margins of abdominal tergite VIII and sternite VIII rounded.

Comparative notes. Based on the general body shape, coloration, robust antennomeres and moderately sparse and large punctation of the pronotum, L. osellai sp.n. is similar to L. lusitana , L. longoelytrata , and L. monticola . Regarding body size, the shape of the apical margins of the elytra, the length of the apical metatarsomere (not longer than basal metatarsomere), this species is similar to L. lusitana and L. monticola . It differs from them by the shorter antennomeres 8–10, a narrower median lobe, and shorter parameres.

Distribution. The species is known from several localities in Serra da Estrela, Portugal, and the Cantabrian mountains, Spain ( Fig. 8 ).

Natural history. Specimens were collected at elevations from 1200 to 1950 m a.s.l. Detailed ecological data are unknown.

Etymology. Patronymic, the species is named to honour our colleague, G. Osella (Verona, Italy), collector of the type material.

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 29–31. Habitus of Lesteva: 29–30–L. osellai (29: male, Spain: Picos de Europa, 30: female, Portugal: Estrela), 31–L. pubescens (Portugal: Estrela). Scale bar: 1.0 mm.

FIGURES 32–37. Aedeagus of Lesteva osellai, paratypes (32–33: Portugal: Estrela, 34–37: Spain: Picos de Europa): 32, 34, 36–parameral view, 33, 35, 37–lateral view). Scale bar: 0.1 mm.