Anthobium umbrinum, 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 : 335-336

Anthobium umbrinum sp. n.

( Figs. 93 , 96 , 101–102 )

Type material examined: Holotype ♂ [dissected; left antennomeres 4–11 are glued on the same card under the specimen; right apical antennomere missing; left paramere without apical portion]: ‘ YUNNAN, 16.-19. JUN | YULONG Mts., 1993 | 27.10N 100.13E | Bolm lgt. 3900 m’ <printed>, ‘HOLOTYPE | Anthobium | umbrinum sp. n. | Shavrin A.V. des. 2022’ <red, printed> ( cSch).

Description. Measurements: HL: 0.35; HW: 0.67; AL: 0.96; OL: 0.17; PL: 0.55; PW: 0.97; ESL: 1.30; EW: 1.42; AW: 1.19; MTbL: 0.60; MTrL: 0.39 (MTrL 1–4: 0.24; MTrL 5: 0.15); AedL: 0.52; TL: 3.00.

Habitus as in Fig. 96 . Body and antennomeres 4–11 brown; lateral portions of pronotum and elytra, paratergites and apical part of abdomen yellow-brown; mouthparts, antennomeres 1–3 and legs yellow. Head with distinct microsculpture, transverse and moderately dense on clypeus, sparser, more irregular and diagonal in middle and transverse on infraorbital ridges, moderately wide mediobasal portion between ocelli without sculpture; pronotum with distinct transverse microreticulation; scutellum without meshes; abdomen with dense transverse microsculpture. Head with irregular, moderately large and deep punctation, sparser in middle, denser and coarser on infraorbital ridges; middle part of neck with sparse and fine punctation; pronotum with moderately dense punctation, coarser and deeper than that in middle of head, sparser in middle and mediobasal third; punctation of elytra about as that on pronotum, but slightly denser, markedly finer in median portion, on each elytron forming very tangled and vague six longitudinal rows of punctures; abdominal tergites with very fine and sparse punctation.

Head slightly less than twice as broad as long; middle portion with indistinct semicircular impression between level of posterior margins of eyes and long and very deep anteocellar fovea, reaching level of apical margin of eye; postocular ridges obtuse. Apical segment of maxillary palpomere twice as long as preceding segment. Antennomere 2 about as broad as basal antennomere, 3 slightly narrower than 2, 4 shorter and slightly broader than 3, 5 longer and broader than 4, 6–9 slightly broader than 5, 10 about as long as broad, slightly broader than 9.

Pronotum 1.7 times as broad as long, 1.4 times as broad as head, more or less evenly narrowed both anteriad and posteriad, with widely rounded anterior angles not protruded anteriad, without median impressions.

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

Metatarsus 1.5 times as long as metatibia.

Male. Apical margin of abdominal tergite VIII truncate. Apical margin of abdominal sternite VIII widely sinuate. Aedeagus very wide, suboval, with wide basal bulb, gradually narrowed toward widely rounded apex; parameres moderately short, narrowed apically, exceeding apex of median lobe, with short apical and two preapical setae; internal sac very long, spirally folded in basal portion ( Fig. 101 ). Lateral aspect of aedeagus as in Fig. 102 .

Female unknown.

Comparative notes. Anthobium umbrinum sp. n. differs from the other species of the tectum group by the very broad aedeagus.

Distribution. The species is known only from the type locality in Yulong mountain range in Yunnan, China ( Fig. 93 ).

Natural history. The specimen was collected at an elevation of 3900 m a.s.l. Detailed ecological data are unknown.

Etymology. The specific epithet (Latin adjective: brown, like earth of Umbria) refers to the coloration of the body.

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 94–98. Habitus of species of the Anthobium tectum group: 94—A. smetanai (holotype), 95—A. tichomirovae (holotype), 96—A. umbrinum (holotype), 97—A. vitreum (holotype), 98—A. infractum (holotype). Scale bar: 1.0 mm.

FIGURES 99–104. Aedeagus of Anthobium tichomirovae (Figs. 99–100; holotype), A. umbrinum (Figs. 101–102; holotype) and A. vitreum (Figs. 103–104; holotype): 99, 101, 103—parameral view, 100, 102, 104—lateral view. Scale bar: 0.1 mm.