Anthobium splendidulum Shavrin & Smetana, 2018

Shavrin, Alexey V. & Smetana, Aleš, 2018, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). II. fusculum group, and two additional species of the nigrum group, Zootaxa 4508 (4), pp. 451-506 : 492-495

Anthobium splendidulum Shavrin & Smetana , sp.n.

( Figs. 78 , 89–93 )

Type material examined: Holotype ♂ [specimen dissected]: ‘ CHINA (Yunnan) | Nujiang Lisu Aut. Pref., | Gaoligong Shan, valley 18 km | W Gongshan , 3020 m | 27°47'54''N, 98°30'13''E | (mixed forest, litter, moss,’ <rectangular label, printed>, ‘wood sifted) | 7.VI.2007 D.W.Wrase [24]’ <rectangular label, printed >, HOLOTYPE | Anthobium | splendidulum sp.n. | Shavrin A. & Smetana A. 2018 ’ <red rectangular label, printed> ( CSC) .

Paratypes (10 specimens): 2 ♀♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan , | N 27°59'01.0'' E 098°32' | 56.9'', 27.v.2010, 3018m, | sifting22, V.Grebennikov’ <rectangular label, printed> ( NSMT) ; 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan , | N 27°59'11.5'' E 098°33' | 25.3'', 28.v.2010, 3086m, | sifting24, V.Grebennikov’ <rectangular label, printed> ( CNC) ; 1 ♂: ‘ CHINA: Yunnan [CH07-24], Nujiang | Lisu Aut. Pref., Gaoligong Shan , valley 18 | km W Gongshan , 3020 m 27°47'64'' N, | 98°30'13''E, mixed forest, litter, moss, | wood sifted, 7.VI.2007, M. Schülke’ <rectangular label, printed> ( CS) ; 1 ♂ [specimen dissected]: ‘ CHINA: Yunnan [CH07-21], | Nujiang Lisu Aut. Pref., Gaoligong Shan , | pass 22 km W Gongshan, N slope 3350- | 3400 m, 27°46'27''N, 98°26'50''E, fern, | moss, litter, sifted, 6.VI.2007, M. Schülke’ <rectangular label, printed> ( CS) ; 1 ♂: ‘ CHINA: Yunnan, Nujiang Lisu Pref., | Gaoligong Shan , “Cloud pass” | 21 km NW Liuku, 3150 m, | 25°58'21''N, 98°41'01''E, | shrubs & bamboo, litter sifted, | 2.IX.2009, leg. M. Schülke [CH09-22]’ ( CSC) ; 1 ♂ [specimen dissected], 2 ♀♀: ‘ CHINA: N-Yunnan [C 2005-06] | Diqing Tibet. Aut. Pref. , | Deqin Co., Baima Shan , pass | 25 km SE Deqin, 4225 m,’ <rectangular label, printed>, ‘ 28°19.38'N, 99°05.47'E, small | creek valley, Rhododendron, Salix , | leaf litter, moss, dead wood, sifted, | 8.VI.2005, M. Schülke [C 2005-06]’ <rectangular lable, printed> ( CSC) ; 1 ♂ [specimen dissected]: ‘ CHINA: N-Yunnan [C 2005-09] | Diqing Tibet. Aut. Pref. , | Deqin Co., Meili Xue Shan , | E-side, 14 km W Deqin, 2580 m,’ <rectangular label, printed>, ‘ 28°27.47'N, 98°46.35'E, creek | valley below glacier, mixed, | leaf litter, moss, dead wood, sifted, | 11.VI.2005, M. Schülke [C 2005-09]’ <rectangular label, printed> ( CSC) . All paratypes with additional red rectangular printed label : ‘ PARATYPE | Anthobium | splendidulum sp.n. | Shavrin A. & Smetana A. des. 2018’.

Description. Measurements (n=9): HW: 0.62–0.70, HL: 0.38–0.45; AL(holotype): 1.11; OL: 0.17–0.20; PL: 0.50–0.52; PW: 1.07–1.17; ESL: 1.32–1.45; EW: 1.43–1.55; AW: 1.28–1.42; MTbL(holotype): 0.62, MTrL(holotype): 0.25 (MTrL 1–4: 0.18; MTrL 5: 0.07); AedL: 0.53–0.60; TL: 2.49–3.34 (holotype: 3.22).

Body wide, subconvex. Body yellow-brown to reddish brown, some specimens with darker head and abdomen (immature specimens with reddish middle part of head and longitudinal narrow spot on middle of pronotum); antennomeres 4–11 reddish-brown to brown; lateral portions of pronotum and some specimens with shoulders of elytra yellow-brown; mouthparts, antennomeres 1–3 and legs yellow. Posterior portions of infraorbital ridges with indistinct transverse andrugose microsculpture (some paratypes without sculpture between punctures there) and abdominal tergites with very indistinct, fine isodiametric microsculpture sculpture or without it. Head with irregular, moderately large and deep punctation, distinctly sparser in middle part (some paratypes only with several punctures) and denser on infraorbital ridges, punctures on posterior part of infraorbital ridges smaller; middle part of neck with irregular, small and sparse punctation; pronotum with irregular dense punctation, larger and deeper than that on head (some paratypes with interspaces between punctures on medioapical part of pronotum as long as puncture diameter), sparser on lateral portions, some specimens with impunctate small area between mediobasal impression; visible part of scutellum with several small punctures or without them; punctation of elytra as that on pronotum, denser and smaller on parascutellar area and along suture, each elytron with indistinct, five to seven vague and tangled longitudinal rows of punctures, usually with moderately wide impunctate longitudinal area between rows 3 and 4; abdominal tergites with very indistinct small punctation. Habitus as in Fig. 78 .

Head 1.5–1.6 times as wide as long; middle portion somewhat flattened or slightly elevated, with very indistinct or distinct and moderately deep transverse impression between middle and posterior third of eyes, with very short and some with indistinct small grooves in front of ocelli usually as long as diameter of ocellus or slightly longer; posterior ridges smooth; anterior portion between antennal insertion and anterior margin of eye with superficial wide notch. Ocelli large, situated at level of postocular ridges; distance between ocelli about as long as distance between ocellus and posterior margin of eye. Apical segment of maxillary palp slightly less than three times as long as preceding segment. Length × width of antennomeres (holotype): 1: 0.13 × 0.06; 2: 0.10 × 0.05; 3–4: 0.11 × 0.04; 5: 0.10 × 0.05; 6–8: 0.09 × 0.05; 9–10: 0.07 × 0.06; 11: 0.15 × 0.06.

Pronotum transverse, distinctly more than twice as wide as long, 1.6–1.7 times as wide as head, widest in middle, slightly more narrowed posteriad than anteriad; apical margin slightly narrower than posterior margin; anterior angles widely rounded and strongly protruded anteriad; posterior angles obtuse; lateral edges of pronotum with irregular and very smooth crenulation; pronotum with very wide markedly elevated middle portion, without or with indistinct, small longitudinal impression on medioapical part and with a pair of indistinct or distinct and deep semioval impressions on mediobasal third.

Elytra slightly broader than long, more than two and half times as long as pronotum, distinctly widened apicad, reaching apical margin of abdominal tergite IV to VII; surface between punctures on medioapical and middle portions of each elytron with irregular longitudinal elevations in some specimens.

Male. Apical margin of abdominal tergite VIII and sternite VIII slightly sinuate. Aedeagus ( Fig. 89 ) bulbose basally, with median lobe markedly, gradually narrowing toward widely rounded apex; parameres narrow, significantly exceeding apex of median lobe, with two small apical and preapical setae and with two additional setae in some specimens ( Fig. 91 ); internal sac moderately wide, elongate, spiralled in basal part. Aedeagus laterally as in Fig. 90 .

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

Comparative notes. Anthobium splendidulum Shavrin & Smetana , sp.n. may be distinguished from all remaining species of the fusculum group by the very short grooves in front of ocelli and by parameres significantly exceeding apex of median lobe.

Distribution. The species is known from several locations ( Fig. 92 ) in Gaoligong Shan, Meili Xue Shan and Baima Shan ranges in Yunnan, China.

Bionomics. Specimens were collected at elevations from 2580 to 4225 m a.s.l. by sifting leaf litter and mosses in mixed forests; one specimen from Gaoligong Shan was taken by sifting litter under shrubs and bamboo (locality: CH 09-22). The locality of one paratype which was collected in Gaoligong Shan (locality: CH 0721) is shown in Fig. 93 .

Etymology. The specific epithet is the Latin adjective splendidus, - a, - um (splendid). It refers to the external attractiveness of the species.

Figures

FIGURE 92. Distribution of Anthobium splendidulum in Yunnan, China.

FIGURE 93. Type locality of Anthobium splendidulum in the Gaoligong Shan range in Yunnan, China (photograph: M. Schülke).

FIGURES 74–78. Habitus of Anthobium fusculum group: 74—A. liliputense (paratype), 75—A. monticola (NEPAL: Lamjung), 76—A. rugosum (NEPAL: Dhaulagiri), 77—A. sociale (INDIA: Uttarakhand), 78—A. splendidulum (CHINA: Yunnan, Gaoligong Shan). Scale bar: 1.0 mm.

FIGURES 89–91. Aedeagus of Anthobium splendidulum (89–90: holotype, 91: paratype; Yunnan: Gaoligong Shan): 89—parameral view, 90—lateral view, 91—apical part of aedeagus, parameral view. Scale bar: 0.1 mm.