Anthobium consanguineum Shavrin & Smetana, 2019

Shavrin, Alexey V. & Smetana, Aleš, 2019, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). III. Consanguineum, crassum and reflexum groups, and an additional species of the fusculum group, Zootaxa 4688 (4), pp. 451-482 : 453-459

Anthobium consanguineum Shavrin & Smetana , sp.n.

( Figs. 1 , 3, 6, 9, 12 , 15, 18, 21, 24, 27, 30, 33 , 36, 39, 42, 45 , 48, 51–52, 55)

Type material examined: Holotype ♂: ‘ CHINA: Yunnan [ CH 07-24], 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, | wood sifted, 7. VI .2007, M. Schülke’ <rectangular label, printed>, ‘ HOLOTYPE | Anthobium | consanguineum sp.n. | Shavrin A.V. & Smetana A. 2019’ <red rectangulat label, printed> ( CSC) .

Paratypes (24 specimens): 4 ♂♂ [two specimens dissected], 5 ♀♀ [one specimen dissected]: same data as the holotype (1 ♂, 1 ♀: CS: 2 ♂♂, 3 ♀♀: CSC; 1 ♂, 1 ♀: NSMT) ; 1 ♂ [dissected]: ‘ CHINA (Yunnan) | Dali Bai Auton Pref., | Diancang Shan W Dali | 25°41’20’’N 100°06’12’’E | 3160 m (small creek valley, | litter and debris sifted | 27.V.2007 D.W. Wrase [02]’ ( CS) ; 2 ♂♂ [one specimen dissected]: ‘ CHINA: N-Yunnan Nujiang Lisu | Aut.Pr.Gongshan Co. Gaoligong | Shan , valley at 3000-3050 m | 27°47.90’N 98°30.19’E | 21. VI.2005 A. Smetana [C169]’ ( CS, NSMT) ; 1 ♂, 1 ♀: ‘ CHINA: N-Yunnan [C 2005-16] | Nujiang Lisu Aut.Pref., Gongshan Co., | Gaoli- gong Shan , sidevalley, | 3000-3050 m, 27°47.90’N, 98°30.19’E’ <rectangular label, printed>, ‘conif[erous]. forest with Rhododendron , broad | leaved bushes, litter, moss, dead wood | sifted along creek and snowfields, | 21. VI.2005, M. Schülke [C 2005-16]’ <rectangular label, printed> ( CSC) ; 10 ♂♂ [two specimens dissected], 4 ♀♀: ‘ 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>, (1 ♂, 1 ♀: CS; 7 ♂♂, 2 ♀♀: CSC; 2 ♂, 1 ♀: NSMT). All paratypes with additional red rectangular printed label : ‘ PARATYPE | Anthobium | consanguineum sp.n. | Shavrin A.V. & Smetana A. 2019’.

One female was not included in the type series, it was dissected and used for the preparing of figures of the body parts: same data as the holotype ( CS).

Description. Measurements (n=25): HW: 0.66–0.74; HL: 0.42–0.43; AL (holotype): 2.20; OL: 0.15–0.17; PL: 0.50–0.61; PW: 1.01–1.17; ESL: 1.39–1.42; EW: 1.30–1.46; AW: 0.97–1.04; MTbL: 0.67; MTrL: 0.27 (MTrL 1–4: 0.17; MTrL 5: 0.10); AedL: 0.42–0.54; TL: 2.65–3.40 (holotype: 3.07).

Body small, subparallel-sided, convex. Head, antennomeres 5–11 (or sometimes 4–11) and apical segment of maxillary palp brown; pronotum, elytra and abdomen yellow-brown to reddish-brown; legs and mouthparts yellow. Body shiny; body without microsculpture except for abdomen with distinct transverse meshes. Head with fine and deep punctation, markedly denser on infraorbital ridges, sometimes with transverse impunctate portions in middle at level of eyes and/or between ocelli; middle part of neck with sparse, fine punctation; pronotum with dense punctation, markedly coarser than that on head, somewhat finer in basal and apical portions, and sparser in mediobasal third and laterobasal portion, sometimes with impunctate mediobasal area; scutellum without punctures; punctation of elytra similar to that of pronotum, finer and sometimes coarser in parascutellar portion, usually finer along suture, each elytron bearing six to seven very vague and tangled longitudinal rows of punctures; abdominal tergites with very small, moderately dense, indistinct punctation. Body glabrous, clypeus with several semierect tactile setae, sometimes middle portion of head between eyes with two short erect setae; lateral margins of pronotum with several very thin and short setae; abdominal tergites with irregular, very sparse and short setae. Habitus as in Fig. 1 .

Head moderately large ( Fig. 15 ), 1.5–1.7 times as wide as long; middle portion slightly elevated, usually with two indistinct transverse impressions between eyes, with distinct, deep, short grooves in front of ocelli, and with narrow irregular impression between ocelli; postocular ridge distinct, acute, with surface between postocular ridge and posterior margin of eye as long as the two or three nearest combined ommatidia; anterior portion between antennal insertion and anterior margin of eye with small, distinct semicircular notch. Eyes large, convex. Ocelli large, situated at about level of postocular ridges; distance between ocelli slightly longer than distance between ocellus and posterior margin of eye. Labrum with widely rounded latero-apical portions, deep medioapical emargination, and with elongate basolateral projections ( Fig. 3 ). Mandibles moderately short and wide, with small tooth near apex of right mandible ( Fig. 6 ). Submentum and labium narrow, with markedly transverse preapical labial palpomeres ( Fig. 12 ). Apical segment of maxillary palpus more than twice as long as preceding segment; galea widened in apical portion; lacinia moderately short, with several preapical teeth ( Fig. 9 ). Gular sutures with shortest distance slightly behind level of posterior margins of eyes ( Fig. 15 ). Antenna moderately short, exceeding apical fourth of elytra when reclined; length × width of antennomeres (holotype): 1: 0.13 × 0.06; 2: 0.11 × 0.03; 3: 0.11 × 0.02; 4: 0.11 × 0.03; 5–6: 0.11 × 0.04; 7: 0.11 × 0.05; 8: 0.09 × 0.05; 9: 0.09 × 0.06; 10: 0.08 × 0.06; 11: 0.15 × 0.07.

Pronotum transverse, about twice or slightly more than twice as wide as long, 1.5 times as wide as head, widest slightly anterior to, or at about middle, slightly more narrowed posteriad than anteriad; apical margin markedly rounded, distinctly narrower than posterior margin; anterior angles widely rounded, indistinctly protruded anteriad; posterior angles more or less obtuse; lateral edges of pronotum with indistinct flattened crenulation; pronotum with very wide elevated middle portion, with indistinct short longitudinal impression at medioapical third (invisible in some paratypes), with small, indistinct to distinct semioval impression on mediobasal third; lateral portions moderately wide, slightly explanate, each with small deep pit approximately in the middle. Prothorax ( Fig. 18 ) with long, narrow intercoxal process and strongly protruded mesosternal processes. Mesothorax ( Fig. 27 ) with acute, long intercoxal process, reaching posterior margin of mesocoxae. Scutellum ( Fig. 21 ) with widely rounded apex. Metathorax as in Fig. 30 . Metendosternite as in Fig. 33 .

Elytra convex, slightly longer than wide, markedly more than twice as long as pronotum, slightly widened in middle, reaching apical margin of abdominal tergites IV to VI, with widely rounded apical margins, truncate at suture; shoulders of elytra rounded, not protruding anteriad ( Fig. 24 ); lateral portions of elytra narrow, slightly explanate, latero-apical margins with indistinct, small, irregular crenulation; surface of each elytron without elevations, but some paratypes with very indistinct longitudinal elevations between punctures in middle. Wings fully developed.

Legs moderately long and slender; mesotibiae covered by elongate setae; metatarsus short, markedly more than twice as long as metatibia.

Abdomen markedly narrower than elytra, with a pair of small transverse tomentose wing-folding spots in middle of tergite V; apical margin of abdominal tergite VII with fine palisade fringe.

Male. Protarsomeres 1–4 distinctly widened. Apical margins of abdominal tergite VIII ( Fig. 36 ) and sternite VIII ( Fig. 39 ) slightly sinuate. Aedeagus ( Fig. 51 ) moderately wide, with widely truncate apex; parameres narrow, curved in apical portion, distinctly exceeding apex of median lobe, with two long apical setae; internal sac wide and moderately long, spirally rolled in basal portion. Aedeagus laterally as in Fig. 52 .

Female. Protarsomeres 1–4 narrow. Apical margin of abdominal tergite VIII ( Fig. 42 ) straight. Apical margin of abdominal sternite VIII ( Fig. 45 ) widely rounded. Genital segment as in Fig. 48 .

Comparative notes. Based on the coloration, general shape of the elytra and aedeagus, A. consanguineum sp.n. is similar to Himalayan A. jaegeri sp.n., from which it differs by the markedly wider pronotum and details of both internal and external characters of the aedeagus.

Distribution. The species is known from several localities in the Gaoligong Shan and Diancang Shan ranges in Yunnan, China ( Fig. 55 ).

Bionomics. Specimens were collected at elevations from 3000 to 3400 m a.s.l. The specimens were taken by sifting litter, mosses, and debris in broadleaved bushes, forests with Rhododendron ; some specimens were taken by sifting from leaf litter, moss and various debris under rhododendron and various broadleaved shrubs near small creeks and snowfields (locality: C169). Ten specimens (locality: CH 07-24) were collected together with A. latissimum Shavrin & Smetana, 2018 (for a photograph of the type locality of this species see in Shavrin & Smetana (2018: Fig. 73 )); 14 specimens (locality: CH 07-21) were collected together with A. splendidulum Shavrin & Smetana, 2018 (for a photograph of the type locality of this species see in Shavrin & Smetana (2018: Fig. 93)); two specimens (locality: C 2005-16) were collected together with Mannerheimia grandilobata Shavrin, 2018 (for a photograph of the type locality of this species see in Shavrin (2018: Fig. 11 ).

Etymology. The specific epithet (Latin adjective: related) refers to the similarity of this species to A. jaegeri sp.n.

Figures

FIGURE 55. Distribution of Anthobium consanguineum (black circles) in China and A. jaegeri (black square) in Nepal.

FIGURES 1–2. Habitus of species of Anthobium consanguineum-group: 1—A. consanguineum (holotype), 2—A. jaegeri (holotype). Scale bar: 1.0 mm.

FIGURES 3–14. Mouthparts (dorsal view) of Anthobium (3, 6, 9, 12—A. consanguineum, 4, 7, 10, 13—A. crassum, 5, 8, 11, 14—A. reflexum): 3–5—labrum, 6–8—mandibles (left and right), 9–11—maxilla (right), 12–14—labium and submentum. Scale bar: 0.1 mm.

FIGURES 15–35. Body parts of Anthobium (15, 18, 21, 24, 27, 30, 33—A. consanguineum, 16, 19, 22, 25, 28, 31, 34—A. crassum, 17, 20, 23, 26, 29, 32, 35—A. reflexum): 15–17—ventral aspect of head, 18–20—ventral aspect of prothorax, 21–23— scutellum (dorsal view), 24–26—ventral aspect of elytron, 27–29—ventral aspect of mesothorax, 30–32—ventral aspect of metathorax (without metanepisternum), 33–35—metendosternite (ventral view). Scale bar: 0.1 mm.

FIGURES 36–47. Abdominal segments of Anthobium (36, 39, 42, 45, 48—A. consanguineum, 37, 40, 43, 46, 49—A. crassum, 38, 41, 44, 47, 50—A. reflexum): 36–38—male tergite VIII (dorsal view), 39–41—male sternite VIII (ventral view), 42–44—female tergite VIII (dorsal view), 45–47—female sternite VIII (ventral view). Scale bar: 0.1 mm.

FIGURES 51–54. Aedeagus of Anthobium consanguineum (51–52: paratype) and A. jaegeri (53–54: holotype): 51, 53—parameral view, 52, 54—lateral view. Scale bar: 0.1 mm.

FIGURES 48–50. Female genital segment (dorsal view) of Anthobium: 48–A. consanguineum, 49—A. crassum, 50—A. reflexum. Scale bars: 0.1 mm.

FIGURES 73–77. Habitus of Anthobium: 73—A. reflexum (Kazakhstan) 74—A. deplanatum (holotype), 75—A. gaoligongshanense (holotype), 76—A. kashmiricum, 77—A. transversale (holotype). Scale bar: 1.0 mm.