Anthobium anishchenkoi, Shavrin & Smetana, 2017

Shavrin, Alexey V. & Smetana, Aleš, 2017, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). I. Gracilipalpe, morchella and nigrum groups, Zootaxa 4365 (1), pp. 1-39 : 26-27

3.3.2.2. Anthobium anishchenkoi sp.n.

( Figs. 66 , 72–73 , 76 )

Type material examined: Holotype ♂: ‘ CHINA, Gansu, Dalijia | Shan, 60 km W Linxia | 3475m, 11.VII.1994 | A.Smetana [C8]’ <rectangular label, printed>, ‘nr. #1 [handwritten] | Anthobium [handwritten] | M.K. Thayer det. 1998’ <rectangular label, printed>, ‘HOLOTYPE | Anthobium | anishchenkoi sp.n. | Shavrin A. & Smetana A. 2017’ <red rectangular label, printed> ( NSMT).

Paratypes (5 specimens): 2 ♂♂, 2 ♀♀: same data as the holotype (2 ♂♂: 1 ♀: NSMT; 1 ♀: CAS); 1 ♂ [plastic plate with aedeagus, abdominal tergite VIII, sternite VIII and apical segment in Canadian balsam was pinned under the plate with beetle]: ‘CHINA, Gansu, Dalijia | Shan, 46 km W Linxia | 2980m, 10.VII.1994 | A. Smetana [C5]’ (CAS). All paratypes with additional red rectangular printed label: ‘PARATYPE | Anthobium | anishchenkoi sp.n. | Shavrin A. & Smetana A. 2017’.

Description. Measurements (n=6): HW: 0.83–0.85, HL: 0.50–0.56; AL (holotype): 1.87; OL: 0.25–0.27; PL: 0.62–0.72; PW: 1.32–1.33; ESL: 1.97–2.22; EW: 1.92–2.03; AW: 1.57–1.62; MTbL (holotype): 1.12; MTrL (holotype): 0.52 (MTrL 1–4: 0.35; MTrL 5: 0.17); AedL: 0.67; TL: 4.15–4.37 (holotype: 4.25).

Body oblong. Head, pronotum and antennomeres 3–11 brown; lateral sides of pronotum, elytra and abdomen reddish-brown; mouthparts, antennomeres 1 and 2, legs and apical segments of abdomen yellow. Head with irregular moderately deep punctation, denser and deeper on medio-basal portion and basal part of infraorbital ridges; pronotum with punctation as that on middle part of head, markedly sparser and more irregular on middle and lateral portions; punctation of elytra dense and deep, smaller on middle part, each elytron with eight to nine indistinct longitudinal rows of serial punctures with very irregular narrow to more or less wide interspaces between them. Habitus as in Fig. 66 .

Head 1.5–1.6 times as wide as long; middle part of head slightly elevated, with distinct transverse impression at level of middle length of eyes. Antenna with moderately elongated antennomeres; measurements of antennomeres (holotype): 1: 0.20 × 0.08; 2: 0.15 × 0.06; 3: 0.18 × 0.07; 4: 0.15 × 0.07; 5–9: 0.16 × 0.07; 10: 0.16 × 0.08; 11: 0.23 × 0.08.

Pronotum slightly flattened in cross section, about twice as wide as long, 1.5 times as wide as head; disc of pronotum with very wide middle elevation and wide indistinct semicircular impression in medio-basal third; lateral portions distinctly explanate, with large and deep pit at middle.

Elytra reaching apical margin of abdominal tergite V–VI, with lateral portions distinctly explanated.

Male. Apical margins of abdominal tergite VIII and sternite VIII slightly sinuate. Aedeagus ( Fig. 72 ) with wide basal part gradually narrowed towards wide and slightly sinuate apex of median lobe; parameres with very wide setiferous lobes, slightly exceeding apex of median lobe, with two pairs of long apical and preapical setae; internal sac moderately narrow and short. Aedeagus laterally as in Fig. 73 .

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

Comparative notes. Anthobium anishchenkoi sp.n. may be distinguished from all remaining species of the nigrum group by the pronotum slightly flattened in cross section with indistinct medio-basal impression on the middle elevation and by details of external and internal structure of the aedeagus.

Distribution. The new species is known from two locations ( Fig. 76 ) in Dalijia Shan in Gansu, China.

Bionomics. Specimens were collected at elevations 2980 to 3475 m a.s.l. Some specimens were taken from under stones quite close to the river, and from soaking wet moss near small river in a pasture formation (locality: C5) and in a seepage on an almost vertical wall (locality: C8).

Etymology. Patronymic, the species is named to honour our colleague, carabidologist Alexander Anishchenko (Daugavpils, Latvia).

Figures

FIGURE 76. Distribution of Anthobium anishchenkoi (black circles), A. conjunctum (black square) and A. densepunctatum (black triangle) in China.

FIGURES 65–69. Habitus of Anthobium: 65—A. nigrum (INDIA: Uttarkashi), 66—A. anishchenkoi (paratype), 67—A. conjunctum (holotype), 68—A. densepunctatum (holotype), 69—A. ivani (paratype).Scale bars: 1.0 mm.

FIGURES 70–73. Aedeagus of Anthobium nigrum (70–71—INDIA: Uttarkashi) and A. anishchenkoi (72–73—paratype): 70, 72—parameral view, 71, 73—lateral view.Scale bars:0.1 mm.