Mannerheimia feldmanni, Shavrin, 2025

Mannerheimia feldmanni sp. nov.

( Figs 2 View FIGURES 1–3 , 6–7 View FIGURES 4–9 )

Type material examined. Holotype ( Fig. 2 View FIGURES 1–3 ; dissected; right antennomeres 7–11 missing): ‘ NEPAL P: Karnali, D: Humla, | Simikot , ~ 14km SE, 3450 m | 29°53´37´´N, 81°55´36´´E, | 18.VI.2022, disturbed mixed | forest, leg. A. Hetzel, 22-#05 ’ <printed>, ‘HOLOTYPE | Mannerheimia | feldmanni sp. nov. | Shavrin A. V. 2025 ’ <red, printed> (cF, to be eventually deposited in Naturkundemuseum Erfurt, Germany) GoogleMaps .

Paratype ♂ (right antennomeres 6–11 and elytra missing): same data as the holotype, with additional red printed label: ‘PARATYPE | Mannerheimia | feldmanni sp. nov. | Shavrin A. V. 2025 ’ <red, printed> (cF) GoogleMaps .

Description. Measurements (n=2): HW: 0.56–0.57; HL: 0.35; OL: 0.17;AL (holotype): 1.02; PL: 0.45; PWmax: 0.75; PWmin: 0.67; ESL: 0.92; EW: 1.10; MTbL (holotype): 0.55; MTrL (holotype): 0.32 (MTrL 1–4: 0.17; MTrL 5: 0.15); AW: 1.11; AedL: 0.55; BL: 2.85–3.00 (holotype).

Body moderately small and wide, shiny ( Fig. 2 View FIGURES 1–3 ). Body reddish brown, with slightly paler pronotum and elytra; antennomeres 7–11 yellow-brown; mouthparts, antennomeres 1–6 and legs yellowish. Latero-apical parts of clypeus with fine diagonal microreticulation; scutellum with fine transverse meshes; abdominal tergites with fine transverse microsculpture, indistinct on tergites VII–VIII. Head with variable and moderately large punctation, sparser in middle; neck with sparse punctation similar to that in middle of head; pronotum with moderately dense punctation, larger and deeper than that in head, finer and sparser on lateral portions and sparser in median part, mediobasal portion without punctures; scutellum without visible punctures; punctation of elytra slightly denser than that on pronotum, denser around scutellum, finer and sparser in middle, each elytron with indistinct five tangled longitudinal rows of punctures, confused in basal and apical portions; abdominal tergites with moderately dense and fine punctation, sparser and finer on tergites VII–VIII. Apical portion of clypeus with several moderately long erect setae; latero-apical parts of pronotum with two erect setae; elytra without visible setation; abdomen with indistinct sparse and fine setation.

Head 1.6 times as broad as long, with indistinctly elevated middle portion; anteocellar foveae short, about as long as diameter of each ocellus, relatively shallow, reaching level of basal third of eyes; anterior portion between antennal insertion and anterior margins of eyes slightly concave. Eyes large and convex. Postocular portions relatively short, strongly narrowed toward neck. Ocelli large, slightly convex, situated distinctly behind level of posterior margins of eyes; distance between ocelli slightly longer than distance between ocellus and posterior margin of eye. Apical maxillary palpomere about two and a half times as long as preceding segment, from about middle strongly narrowed toward subacute apex. Antennae reaching apical basal margin of pronotum when reclined; basal antennomere wide, about two and a half times as long as broad, antennomere 2 slightly narrower and distinctly shorter than basal antennomere, 3 about as long as and slightly narrower than 2, 4 small, about as long as broad, 5 distinctly longer than 4, 6 slightly broader than 5, 7 slightly broader than 6, 8 slightly shorter than 7, 9–10 slightly broader than 8, apical antennomere distinctly more than twice as long as 10, from middle gradually narrowed toward subacute apex.

Pronotum 1.6 times as broad as long, 1.3 times as broad as head, widest in middle, gradually narrowed both anteriad and posteriad; apical margin rounded, slightly narrower than rounded posterior margin; anterior angles widely rounded, not protruded anteriad; laterobasal margins not sinuate in front of widely rounded posterior angles; laterobasal portions narrowly impressed.

Elytra 1.1 times as broad as long, strongly broadened apicad, twice as long as pronotum; apical margins straight; surface of each elytron in middle longitudinally elevated between punctures. Hind wings fully developed.

Metatarsus 1.7 times as long as metatibia.

Abdomen slightly broader than elytra, with two small oval tomentose spots in middle of abdominal tergite V; abdominal tergite VII with indistinct narrow palisade fringe.

Male. Apical margin of abdominal tergite VIII truncate or indistinctly sinuate. Apical margin of abdominal sternite VIII widely concave. Aedeagus with moderately wide basal portion, gradually narrowed apically; median lobe narrow, gradually narrowed toward preapical part and broadened in apical part, with small rounded apex; parameres distinctly longer than apex of median lobe, broadened in preapical parts, each gradually narrowed apically; internal sac long and moderately narrow, with two fields of spines becoming larger in apical part ( Fig. 6 View FIGURES 4–9 ). Lateral aspect of aedeagus as in Fig. 7 View FIGURES 4–9 .

Female unknown.

Comparative notes. Mannerheimia feldmanni sp. nov. can be distinguished from all known species of the genus by the shape of the apical part of the median lobe. Based on the shapes of antennomeres 4–10, the shape of the pronotum widest in the middle and with rounded hind angles, and the length of elytra, M. feldmanni sp. nov. is similar to M. afghanica Coiffait, 1982 , known from Afghanistan ( Shavrin 2021b) and M. loebli Shavrin, 2022 , recently described from Pakistan ( Shavrin 2022c), from which it differs by the slightly longer body, the sparser punctation of the narrower pronotum and elytra, significantly narrower median lobe and different morphology of the internal sac.

Distribution. Mannerheimia feldmanni sp. nov. is known only from the type locality in western Nepal.

Bionomics. The specimens were collected at an elevation 3450 m a.s.l. by sifting litter in disturbed mixed forest.

Etymology. Patronymic; the species is named to honour Benedikt Feldmann (Münster).