Mannerheimia prolongata, Shavrin, 2023

Shavrin, Alexey V., 2023, Two new species and faunistic records of the genus Mannerheimia Mäklin, 1880 from India, Nepal and China, and additional notes on some eastern Palaearctic species of Omaliinae Macleay, 1825 (Coleoptera: Staphylinidae), Zootaxa 5319 (4), pp. 524-536 : 525-528

Mannerheimia prolongata sp. n.

( Figs. 1 , 3–4 , 6 )

Type material. Holotype ♁: ‘ INDIEN: Uttar Pradesh | Valley of Flowers | 3.8.1989 3100- | leg. A. RIEDEL 3600m’ <yellow label, printed>, ‘ HOLOTYPE | Mannerheimia | prolongata sp.n. | Shavrin A.V. des. 2023’ <red label, printed> ( SMNS).

Paratypes: 6 ♁♁ (two specimens dissected), 2 ♀♀ (one specimen dissected): same data as for holotype, with additional red printed label : ‘ PARATYPE | Mannerheimia | prolongata sp.n. | Shavrin A.V. des. 2023’ (1 ♁, 1 ♀: cSh; 5 ♁♁, 1 ♀: SMNS) .

Description. Measurements (n=9): HW: 0.55–0.57; HL: 0.35–0.37; OL: 0.17–0.19; AL (holotype): 1.06; PL: 0.50–0.54; PWmax: 0.75–0.77; PWmin: 0.71–0.76; ESL: 0.84–0.91; EW: 1.08–1.14; MTbL (holotype): 0.62; MTrL (holotype): 0.40 (MTrL 1–4: 0.20; MTrL 5: 0.20); AW: 1.12–1.22; AedL: 0.82–0.89; BL: 2.85–3.34 (holotype: 3.15).

Body moderately small, convex and elongate ( Fig. 1 ). Coloration yellow-brown to reddish-brown, with darker head and abdomen (darker specimens with paler lateral and basal portions of pronotum and paratergites); antennomeres 7–11 and legs brownish (yellow-brown specimens with yellowish antennae and legs); mouthparts, antennomeres 1–6 and tarsi yellow. Body shiny, lacking microsculpture except for abdomen, with dense and fine transverse microreticulation, indistinct in some specimens. Head with variable, irregular and sparse punctation, finer and sparser on clypeus, denser, larger and deeper between eyes (four specimens with moderately fine and sparse punctures in middle), narrow elongate regions of head in front of ocelli sometimes lacking punctures, infraorbital portions usually with very sparse punctation, neck region with very sparse and fine punctation; punctation of pronotum moderately dense, about as that as on middle portion of head or distinctly larger and deeper, sparser in median and basal portions, some specimens with finer punctation in medioapical portion, mediobasal third sometimes lacking punctures; scutellum without or with two-three very fine punctures in middle; punctation of elytra similar to that of pronotum, finer in parascutellar portion (holotype and three paratypes) and along suture, each elytron without or with indistinct four to five very tangled longitudinal rows of punctures, these rows confused in basal and apical portions; abdominal tergites with fine and moderately dense punctation, sparser and indistinct on abdominal tergites VI–VIII. Apical portion of clypeus with sparse, moderately long and erect setae, each laterobasal portions with long erect setae (missing in some specimens); apical and lateral margins of pronotum usually with several long setae; lateral portions of elytra with several short erect setae; abdomen without or with very sparse and short setation.

Head 1.5 times as broad as long, with slightly elevated middle portion; anteocellar foveae very short and moderately deep, about as long as ocellus or slightly shorter; anterior portion between antennal insertion and anterior margins of eyes slightly concave. Eyes large and convex. Ocelli moderately large, slightly convex, situated at about level or slightly behind of posterior margin of eyes; distance between ocelli slightly longer than distance between ocellus and posterior margin of eyes. Apical palpomere of maxillary palpi distinctly more than twice as long as preceding palpomere, from basal portion gradually narrowed toward acute apex. Antennae reaching apical portion of elytra when turned backwards, with relatively elongate antennomeres 4–10; basal antennomere ovoid, distinctly more than twice as long as broad, antennomere 2 slightly narrower and shorter than basal antennomere, 3 about as long 2, 4 about twice shorter than 3, 5 slightly longer and broader than 4, 6 slightly broader than 5, 7 slightly broader than 6, 8–9 distinctly shorter than 7, 10 slightly shorter than 9, apical antennomere about twice as long as preceding antennomere, from middle gradually narrowing toward acute apex.

Pronotum 1.4–1.5 times as broad as long, 1.3 times as broad as head, widest slightly in front of middle, slightly more narrowed posteriad than anteriad; apical margin somewhat straight or distinctly rounded, distinctly narrower than rounded posterior margin; anterior angles widely rounded, slightly or distinctly protruding anteriad; latero-basal margins of pronotum slightly sinuate in front of rounded posterior angles; laterobasal portions widely impressed.

Elytra 1.2 times as broad as long, slightly to strongly broadened apicad, 1.6 times as long as pronotum; apical margins rounded; surface of each elytron in mediobasal portion longitudinally elevated between punctures in some specimens.

Metatarsus 1.5 times shorter than metatibia.

Abdomen distinctly broader than elytra, with two small oval tomentose wing-folding spots in middle of abdominal tergite V; apical margin of abdominal tergite VII with narrow palisade fringe.

Male. Apical margins of abdominal tergite VIII and sternite VIII widely concave. Aedeagus with very wide basal portion, strongly narrowed apically toward subacute apex; parameres wide, significantly longer than apex of median lobe, distinctly widened apically and narrowed in apical portions toward subacute apices, with a row of very small 10–12 spines mixed with very fine and short setae along inner sides of each apical part of parameral lobe; internal sac very long, with two fields of small spines and with two long and narrow sclerotized structures in preapical part of median lobe ( Fig. 3 ). Lateral aspect of aedeagus as in Fig. 4 .

Female. Apical margin of abdominal tergite VIII straight. Apical margin of abdominal sternite VIII widely rounded.

Comparative notes. Based on the general shape, coloration of the body, and the shape of relatively elongate antennomeres 4–10, M. prolongata sp.n. is similar to M. arctica (Erichson, 1840) , species widely distributed in the Palaearctic Region ( Shavrin 2021b). The new species can be distinguished from it by the less transverse pronotum (the pronotum of M. asiatica is distinctly broader, twice as broad as long), narrower apical portion of the median lobe and parameres, the presence of small spines on inner margin of the each apical portion of the parameres and by the different structure of the internal sac.

Distribution. Mannerheimia prolongata sp. n. is known only from the type locality in the Valley of Flowers National Park in Uttarakhand, India ( Fig. 6 ).

Bionomics. Specimens were collected at elevations from 3100 to 3600 m a.s.l. The detailed ecological data are unknown.

Etymology. The specific epithet is the Latin prolongatus, - a, - um (lengthened). It alludes to the shape of elongate parameres.

Figures

FIGURE 6. Distribution of Mannerheimia in the Himalayan Region: M. prolongata (circle), M. punctatissima (square).

FIGURES 1–2. Habitus of Mannerheimia: 1—Mannerheimia prolongata (paratype), 2—M. punctatissima (paratype). Scale bar: 1.0 mm.

FIGURES 3–5. Aedeagus of Mannerheimia prolongata (Figs. 3–4) and M. punctatissima (Fig. 5): 3, 5—parameral view, 4—lateral view. Scale bar: 0.10 mm.