Anthobium multipunctatum, Shavrin, 2022

Shavrin, Alexey V., 2022, A revision of Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae Omaliinae: Anthophagini). V. Algidum, morosum and tectum groups, a new species of the fusculum group, and faunistic records, Zootaxa 5104 (3), pp. 301-346 : 331-333

Anthobium multipunctatum sp. n.

( Figs. 5 , 89–90 , 93 )

Type material examined: Holotype ♂ [dissected; left antennomeres 9–11 missing]: ‘ CHINA, S-Sichuan, | S Yanyuan, Chuandongzi- | Massif , 27°20`22``N, | 101°32`43``E, 4100 m | 9.-19.VI.2017, leg. Reuter’ <printed>, ‘ Deliphrum ? | sp. | det. Zanetti 2018’ <printed>, ‘HOLOTYPE | Anthobium | multipunctatum sp. n. | Shavrin A.V. des. 2022’ <red, printed> (cF, to be eventually deposited in Museum für Naturkunde, Berlin, Germany).

Paratype, 1 ♂: same data as the holotype, with additional red printed label: ‘ PARATYPE | Anthobium | multipunctatum sp. n. | Shavrin A.V. des. 2022’ (cSh).

Description. Measurements (n=2): HL: 0.40–0.45; HW: 0.51–0.65; AL (holotype): 1.20; OL: 0.18–0.20; PL: 0.52–0.55; PW: 0.95–1.00; ESL: 1.27–1.32; EW: 1.30–1.41; AW: 1.07–1.23; MTbL (holotype): 0.55; MTrL (holotype): 0.35 (MTrL 1–4: 0.20; MTrL 5: 0.15); AedL: 0.54; TL: 2.81–3.35 (holotype).

Habitus as in Fig. 5 . Head and antennomeres 4–11 dark-brown; maxillary palpomeres, pronotum and abdomen brown (abdomen of paratype paler); lateral and basal portions of pronotum, elytra and paratergites of abdomen yellow-brown; mouthparts, antennomeres 1–3 and legs yellow. Body shiny, with bluish reflex in middle of head, neck and medioapical portion of pronotum. Head with very dense transverse microsculpture on vertex, moderately sparse and transverse meshes in middle and isodiametric microreticulation on infraorbital ridges; neck with dense and transverse microsculpture; pronotum with distinct transverse microreticulation, indistinct in mediobasal third; scutellum without meshes; abdomen with very dense and transverse microsculpture. Head with irregular punctation, fine and very sparse on vertex, denser and coarser in middle and infraorbital ridges; middle part of neck with very sparse and fine punctation; pronotum with moderately dense and large punctation, finer and sparser in middle and mediobasal portions; scutellum with several very fine punctures in middle; punctation of elytra denser and deeper than that on pronotum, coarser in parascutellar portion and finer along suture, on each elytron forming six tangled and very vague six longitudinal rows of punctures; abdominal tergites with very indistinct, fine and sparse punctation.

Head 1.2–1.4 times as broad as long; middle and basal portion of pronotum slightly elevated, with indistinct transverse impression in middle at level of posterior third of eyes, with long and deep anteocellar foveae, reaching about level of apical margin of eye; postocular ridges distinct, acute. Apical segment of maxillary palpomere distinctly more than twice as long as preceding segment. Antennomere 2 slightly narrower than basal antennomere, 3 slightly longer than 2, 4 distinctly shorter than 3, 5–6 slightly longer and broader than 4, 7 slightly broader than 6, 8 shorter than 7, 9 slightly broader than 8, 10 transverse, slightly shorter than 9, apical antennomere about 1.6 times as long as preapical antennomere, from apical third gradually narrowed toward rounded apex.

Pronotum 1.8 times as broad as long, 1.5–1.8 times as broad as head, from widest middle evenly narrowed both anteriad and posteriad, anterior angles not protruded anteriad; middle portion with indistinct longitudinal impression in medioapical portion.

Elytra slightly broader than long, distinctly more than twice as long as pronotum, reaching apical margin of abdominal tergite IV or V, with rounded apical margins.

Metatarsus 1.5 times as long as metatibia.

Male. Apical margin of abdominal tergite VIII rounded. Apical margin of abdominal sternite VIII widely sinuate. Aedeagus very wide, from basal bulb gradually narrowed toward widely truncate apex; parameres significantly exceeding apex of median lobe, slightly narrowed apically, with two short apical and one preapical setae; internal sac very long ( Fig. 89 ). Lateral aspect of aedeagus as in Fig. 90 .

Female unknown.

Comparative notes. Anthobium multipunctatum sp. n. differs from the other species of the tectum group by the darker body with the bluish reflex in the middle of the head, on the neck, and in the medioapical portion of the pronotum, and by the shape of the median lobe of the aedeagus.

Distribution. The species is known only from the type locality in Hengduand mountain range near Chuandongzi Mt. in Sichuan, China ( Fig. 93 ).

Natural history. The specimens were collected at an elevation of 4100 m a.s.l. Detailed ecological data are unknown.

Etymology. The specific epithet (Latin adjective) refers to the moderately dense punctation of the pronotum and elytra.

Figures

FIGURE 93. Distribution of Anthobium in China and Nepal: A. cornatipenis (black circle), A. himalayense (black star), A. infractum (white square), A. morosum (white star), A. multipunctatum (white circle), A. smetanai (black square), A. umbrinum (black triangle), A. vitreum (black diamond).

FIGURES 1–5. Habitus of species of Anthobium: 1—A. algidum (Austria, Innsbruck), 2—A. tectum (Russia, Buryatia), 3—A. cornatipenis (paratype), 4—A. himalayense (holotype), 5—A. multipunctatum (holotype). Scale bar: 1.0 mm.

FIGURES 87–92.Aedeagus of Anthobium himalayense (Figs. 87–88; paratype), A. multipunctatum (Figs. 89–90; holotype) and A. smetanai (Figs. 91–92; paratype): 87, 89, 91—parameral view, 88, 90, 92—lateral view. Scale bar: 0.1 mm.