Anthobium hartmanni, Shavrin, 2025

Shavrin, Alexey V., 2025, A revision of eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). VIII. A new species and additional records from Nepal, Zootaxa 5646 (3), pp. 445-450 : 446-449

Anthobium hartmanni sp. nov.

( Figs 1–4 )

Type material examined. Holotype ♂ ( Fig. 1 ): ‘E-NEPAL, D:Taplejung | E slope Pathibara | 3500-3750m, 13. V. | 2016, leg. J. Schmidt | 27°26`N, 87°46`E’ <printed>, ‘ HOLOTYPE | Anthobium | hartmanni sp. nov. | Shavrin A. V. des. 2025’ <printed> ( NME).

Paratypes (7 ♂ 6 ♀): NEPAL: KoSHI: 6 ♂ (two specimens dissected; three male without right antennomeres 3–11, one male without left antennomeres 3–11, one male without left antennomeres 9–11), 4 ♀ (one female without left antennomeres 3–11, one female without left antennomeres 7–11): 6 ♂, 4 ♀: same data as the holotype (2 ♂, 2 ♀: cSh; 4 ♂, 2 ♀: NME); 1 ♀: ‘E-NEPAL, D:Taplejung | E slope Pathibara | 3000-3400m, 27°26`| 20``N, 87°46`44``E, leg. | Schmidt, 14.-16. V.2016 ’ <printed>, ‘collection | NATURKUNDE- | MUSEUM ERFURT’ <yellow, printed> ( NME); 1 ♂ (right antennomeres 3-11 missing): ‘E-NEPAL Taplejung Distr. | E-slope Pathibara 35-3750m | 13. V.2016 leg. Schmidt | 27°26`N 87°46`E’ <printed> ( NME); 1 ♀ (left antennomeres 10–11 missing): ‘ NEPAL, E, Kongma | Danda, env. Kongma | 3800m, 14. + 25. V.2014 | leg. J. Schmidt, 27°39`| 22``N, 87°12`30``E’ <printed>, ‘collection | NATURKUNDE | MUSEUM ERFURT’ <yellow, printed> ( NME). All parartypes with additional red printed labels: ‘ PARATYPE | Anthobium | hartmanni sp. nov. | Shavrin A. V. des. 2025’ <printed>.

Description. Measurements (n=14): maximum width of head including eyes: 0.63–0.70; length of head (from base of labrum to posterior constriction along head midline): 0.37–0.41; length of antenna (holotype): 1.39; ocular length (longitudinal): 0.17–0.20; length of temple: 0.07–0.08; length of pronotum: 0.49–0.55; maximum width of pronotum: 1.01–1.05; minimum width of pronotum (basal portion): 0.87–0.92; sutural length of elytra (length of elytra from apex of scutellum to posterior margin of sutural angle): 1.25–1.29; maximum width of elytra: 1.35– 1.40; length of metatibia (holotype): 0.72; length of metatarsus (holotype): 0.29 (length of metatasomeres 1–4: 0.17; length of metatarsomere 5: 0.12); maximum width of abdomen: 1.17–1.47; length of aedeagus (from base of median lobe to apex of parameres): 0.75; total length of body (from anterior margin of clypeus to apex of abdomen): 3.25–3.77 (holotype: 3.75).

Habitus as in Fig. 1 . Forebody glossy; head and abdomen reddish-brown (some paratypes with paler abdomen; paratergites distinctly paler in all specimens); pronotum and elytra yellow-brown to brown, with paler lateral and apical portions; antennomeres 6–11 brown; mouthparts yellowish to reddish; antennomeres 1–5 and legs yellowish. Head without or with traces of fine transverse microreticulation on frontal portion, with dense diagonal meshes between antennal insertion and apical margin of eye, and with indistinct transverse or diagonal meshes on posterior parts of infraorbital portions; neck with transverse or isodiametric meshes in middle, sometimes invisible in some specimens; pronotum, scutellum and elytra without microsculpture; abdomen with dense and fine isodiametric microreticulation. Head with sparse, moderately large an deep punctation, markedly sparser between eyes and denser on infraorbital portions, transverse area in front of ocelli usually impunctate; neck with sparse and fine punctation; pronotum with dense and deep punctation, sparser in lateral portions, interstices between punctures in middle about as long as diameter of one-two nearest puncture (some paratypes with slightly finer punctation in mediobasal third); visible part of scutellum with several fine punctures; punctation of elytra about as that on pronotum, sometimes slightly sparser and larger, denser and larger in medioapical part, finer around scutellum and sparser along suture, each elytron bearing five to six tangled and vague longitudinal rows of punctures; abdominal tergites without visible punctures.

Head transverse, 1.7 times as broad as long, distinctly convex in middle; middle portion with wide semicircular impression; anteriomedian depressions moderately wide and deep, reaching about level of middle length of eyes; anteocellar foveae (grooves in front of ocelli) narrow, moderately deep, subparallel or slightly divergent lateroposteriad toward level of posterior third or middle length of eyes; postocular ridges distinctly protruded laterad, subacute, with interspaces between anterior margin of eyes and ridge about as long as nearest two ommatidia; each anterior portion between antennal insertion and anterior margin of eye with small semicircular notch. Eyes large, strongly convex. Maxillary palpomeres distinctly elongate, with long apical palpomere, about four times as long as preapical segment, from basal third gradually narrowed toward acute apex. Antenna almost reaching basal third of elytra when reclined; basal antennomere about two and a half times as long as broad, antennomere 2 slightly narrower and distinctly shorter than basal antennomere, 3 slightly narrower and about as long as 2, 4–7 indistinctly shorter and broader than 3, 8 slightly shorter than 7, 9–10 distinctly broader than 8, apical antennomere 1.3–1.5 times as long as preapical antennomere, from preapical part strongly narrowed toward apex.

Pronotum strongly transverse, slightly less than twice as broad as long, 1.5–1.6 times as broad as head, widest in middle, slightly more narrowed posteriad than anteriad; apical angles widely rounded, slightly protruded anteriad; posterior angles rounded, sometimes with indistinctly concave latero-basal margins in some paratypes; apical margin widely rounded, distinctly shorter than rounded posterior margin; middle portion relatively strongly elevated, with narrow or relatively wide longitudinal (indistinct in some paratypes) and semicircular deep transverse mediobasal impressions; lateral edges with distinct regular crenulation; lateral portions widely impressed and distinctly explanate, each with deep and wide transverse or oval pit in about middle.

Elytra slightly broader than long, gradually broadened posteriad, more than twice as long as pronotum, reaching basal margin of abdominal tergite IV–V; humeri widely rounded, not protruded anteriad; mediobasal and mediolateral portions of each elytron with irregular diagonal and elongate elevations between punctures; lateral portions relatively narrow, slightly explanate; lateral edges with distinct small crenulation, acute in latero-apical parts, more flattened in middle and reduced in latero-apical parts. Hind wings fully developed.

Legs relatively long and slender, with moderately dense and long setae on outer margins of pro- and mesotibiae, with additional long and moderately dense setae on inner sides; metatibae covered by long and dense setation, longer in apical half; metatarsi more than twice shorter than metatibia.

Abdomen convex, slightly narrower or broader than elytra, with a pair of small oval tomentose spots in middle of abdominal tergite V, with moderately wide palisade fringe on apical margin of abdominal tergite VII.

Male. Protarsomeres 1–4 distinctly broadened. Apical margin of abdominal tergite VIII straight or rounded. Apical margin of abdominal sternite VIII widely sinuate. Aedeagus relatively narrow, elongate, with moderately wide basal portion, gradually narrowed toward rounded apex; parameres relatively wide, distinclty longer than apex of median lobe, slightly brodened in apical parts, from preapical portion strongly narrowed toward small apex, each with two short apical setae; internal sac wide and long, spirally folded in basal portion, with large and elongate fields of lateral spines ( Fig. 2 ). Lateral aspect of the aedeagus as in Fig. 3 .

Female. Protarsomeres 1–4 moderately narrow. Apical margins of abdominal tergite VIII and sternite VIII truncate.

Comparative notes. Based on the general shape of the body and the aedeagus, the punctation of the elytra, missing of the microsculpture on the transverse pronotum, long elytra, the shape of the pronotum with similar impressions on the median disc, A. hartmanni sp. nov. is similar to Chinese A. capitale Shavrin & Smetana, 2018 , known from northern Yunnan ( Shavrin & Smetana 2019). It can be distinguished from it by the longer body and slightly darker coloration, longer antennomeres 9–10, slightly broader elytra, narrower median lobe, slightly shorter parameres and different structure of the internal sac.

Distribution. Anthobium hartmanni sp. nov. is known from two localities in Koshi, eastern part of Nepal ( Fig. 4 ).

Bionomics. Specimens were collected at elevations from 3000 to 3800 m a.s.l. The detailed bionomical data are unknown.

Etymology. Patronymic, the species is named to honour my colleague Matthias Hartmann (Erfurt).

Figures

FIGURE 4. Distribution of Anthobium in Nepal: A. denticulatum (rounds), A. hartmanni (stars).

FIGURES 1–3. Anthobium hartmanni: 1–habitus, dorsal view (holotype), 2–aedeagus, parameral view (paratype), 3–aedeagus, lateral view (paratype). Scale bars (Fig. 1: 1.0 mm, Figs. 2–3: 0.1 mm).