Anthobiomorphus rougemonti Shavrin & Smetana, 2020

Shavrin, Alexey V. & Smetana, Aleš, 2020, Anthobiomorphus, a new genus of Anthophagini Thomson, 1859 (Coleoptera: Staphylinidae: Omaliinae), with description of two new species from China, India and Nepal, Zootaxa 4755 (3), pp. 576-586 : 579-582

Anthobiomorphus rougemonti Shavrin & Smetana , sp.n.

( Figs. 1 , 3–6 , 8–15 , 18 )

Type material examined: Holotype ♂ [dissected]: ‘ CHINA: Yunnan, Lijiang | Yushuizhai ca. 2600 m. | 14.IV.2003 stream moss | G. de Rougemont leg.’ <rectangular label, printed>, ‘ HOLOTYPE | Anthobiomorphus | rougemonti sp.n. | Shavrin A. V. & Smetana A. 2020’ <red rectangular label, printed> ( OUMNH) .

Paratypes (3 specimens): 1 ♂ [dissected; left antennomeres 7–11 missing], 1 ♀: same data as the holotype (1 ♂: ASCD, 1 ♀: OUMNH); 1 ♀ [dissected]: ‘ CHINA: Yunnan, Dali | Cangshan ca 2500 m. | 10.IV.2003 stream moss | G. de Rougemont leg.’ ( OUMNH). All paratypes with additional red rectangular printed label: ‘ PARATYPE | Anthobiomorphus | rougemonti sp.n. | Shavrin A. V. & Smetana A. 2020’.

Description. Measurements (n=4): HW: 0.67–0.75; HL: 0.42; AL (holotype): 1.64; OL: 0.20; PL: 0.56–0.65; PW: 0.97–1.07; ESL: 1.50–1.62; EW: 1.35–1.55; AW: 0.97–1.20; MTbL (holotype): 0.91; MTrL (holotype): 0.37 (MTrL 1–4: 0.22; MTrL 5: 0.15); AedL: 0.40–0.45; TL: 3.35–4.00 (holotype: 3.60).

Forebody dark-brown to black; pronotum and abdomen reddish-brown; lateral and basal margins of pronotum, apical margins of elytra, legs and apical abdominal tergites yellow-brown; antennomeres 1–2 and tarsi yellow; mouthparts yellow-brown to brown (yellow in one paratype); antennomeres 3–11 brown. Forebody without microsculpture except for clypeus with distinct, large, transverse microreticulation, gradually becoming indistinct and smaller on frons, and latero-apical portions of head between supra-antennal prominences and apical margins of eyes with distinct, dense meshes; abdomen without or with very indistinct transverse microreticulation, glossy; moderately dense and transverse microsculpture visible only on tergite VIII. Habitus as in Fig. 1 .

Head 1.5–1.7 times as wide as long; middle portion of head slightly or distinctly elevated; latero-apical impressions moderately deep and oval; grooves in front of ocelli deep and very long, diagonally stretching apicad to level of anterior third of length of eyes, sometimes indistinctly connected with latero-apical impressions; anterior portion of head between antennal insertion and anterior margin of eye with small, distinct, semicircular notch. Surface of head with irregular, sparse punctation; frons with or without several small punctures in middle, smooth in one paratype; middle portion between eyes with sparse, moderately large and deep punctures, mixed with small punctures between ocelli and on area near posterior margin of eyes; neck with moderately dense and large setose punctures. Ocelli situated at level of postocular ridges, distance between ocelli about one and half times as long as distance between ocellus and posterior margin of eye. Labrum as in Fig. 3 . Mandibles as in Fig. 4 . Labium and mentum as in Fig. 5 . Maxilla as in Fig. 6 ; apical maxillary palpomere about three times as long as indistinctly narrower penultimate palpomere; galea divided into two unequally wide lobes. Antennomeres 4–10 somewhat short and wide; basal antennomere 1.3 times as long as 2, antennomere 2 ovoid, indistinctly narrower than 3, 4 as long as 3, 5–7 slightly longer than 4, 10 slightly shorter than 9, apical antennomere 1.3 times as long as 10.

Pronotum 1.6–1.7 times as wide as long, 1.4 times as wide as head, from middle indistinctly narrowed anteriad towards markedly protruding anterior angles; apical margin straight or rounded, slightly narrower than somewhat rounded posterior margin; lateral edges with two irregular, distinct protrusions anterior to sharply narrowed laterobasal margins; medioapical portion significantly convex, mediobasal portion or area near basal margin with wide and very deep semicircular impression. Punctation sparse and irregular: middle portion with moderately dense and large punctation, markedly smaller and sparser on mediobasal portion (impunctate in one paratype), distinctly larger and deeper on basal portion, and large, sparse and smooth on lateral portions; scutellum with or without several small punctures.

Elytra markedly more than twice as long as pronotum, distinctly widened toward middle and from middle slightly narrowed apicad, reaching apical margin of abdominal tergite IV or V, with widely rounded apical margins, truncate at suture; parascutellar portion near suture indistinctly impressed in some specimens. Punctation deep, denser than that on pronotum, somewhat denser and smaller on parascutellar area, smaller along suture, on each elytron forming six to seven indistinct, very vague and tangled longitudinal rows of punctures.

Apical metatarsomere as long as two preceding tarsomeres.

Male. Apical margin of abdominal tergite VIII somewhat straight ( Fig. 8 ). Apical margin of abdominal sternite VIII broadly shallowly emarginate ( Fig. 9 ). Male genital segment as in Fig. 12 . Aedeagus ( Fig. 14 ) with median lobe indistinctly narrowed toward widely rounded apex; parameres moderately narrow, slightly exceeding apex of median lobe, with two apical and one preapical short setae; internal sac narrow, long. Aedeagus laterally as in Fig. 15 .

Female. Apical margins of abdominal tergite VIII ( Fig. 10 ) and sternite VIII ( Fig. 11 ) rounded. Genital segment as in Fig. 13 .

Comparative notes. Anthobiomorphus rougemonti sp.n. differs from A. makranczyi sp.n. by somewhat larger and darker body, the shape of the pronotum (more convex in medioapical portion and with lateral edges from middle indistinctly narrowed anteriad towards markedly protruding anterior angles), wider antennomeres 4–8, narrower median lobe and internal sac, and narrower and shorter parameres, slightly exceeding apex of the median lobe.

Distribution. The species is at present known from two locations near Yulong Snow Mountain (=Jade Dragon Snow Mountain; locality in Yushuizhai) and Cangshan range in northern Yunnan, China ( Fig. 18 ).

Bionomics. Specimens were collected at elevations from 2500 to 2600 m a.s.l. and were taken from stream mosses.

Etymology. Eponymic, the species is named in honor our colleague Guillaume de Rougemont (Oxford), the collector of the type specimens.

Figures

FIGURE 18. Distribution of Anthobiomorphus rougemonti (black circles) in China and A. makranczyi (black squares) in India and Nepal.

FIGURES 1–2. Habitus of species of Anthobiomorphus: 1–A. rougemonti (paratype, Lijiang), 2–A. makranczyi (holotype). Scale bars: 1.0 mm.

FIGURES 3–7. Mouthparts of Anthobiomorphus (3–6–A. rougemonti, 7–A. makranczyi): 3–labrum (dorsal view), 4–mandibles (left and right; dorsal view), 5–labium and mentum (ventral view), 6–maxilla (left; ventral view), 7–maxillary palpus and galea of left maxilla (dorsal view). Scale bars: 0.1 mm.

FIGURES 8–13. Abdominal segments of Anthobiomorphus rougemonti: 8–male tergite VIII (dorsal view), 9–male sternite VIII (ventral view), 10–female tergite VIII (dorsal view), 11–female sternite VIII (ventral view), 12–male genital segment (IX–X, dorsal view), 13–female genital segment (IX–X, dorsal view). Scale bars: 0.1 mm.

FIGURES 14–17. Aedeagi of Anthobiomorphus rougemonti (14–15: holotype) and A. makranczyi (16–17: holotype): 14, 16– parameral view, 15, 17–lateral view. Scale bars: 0.1 mm.