Deinopteroloma bisbisinuatum Smetana & Shavrin

Smetana, Aleš, 2016, Nine new species of the genus Deinopteroloma Jansson, 1946 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini) from China and Vietnam, Zootaxa 4196 (2), pp. 221-249 : 228-229

Deinopteroloma bisbisinuatum Smetana & Shavrin , sp.n.

( Figs. 1 , 10, 16, 22−25, 44, 51, 58, 65)

Type material examined: Holotype Ƌ [plastic plate with aedeagus and apical abdominal segment in Canadian balsam was pinned under the plate with beetle; genital segment was glued to the same plate under the beetle]: “P.R. CHINA, Sichuan, \ NE slope Gongga Shan \ N29°50ʹ05ʹʹ E102°02ʹ \ 53ʹʹ, 11.vi.2011, 3019m, \ sift15, V.Grebennikov ” [rectangular printed label], “ HOLOTYPE \ Deinopteroloma \ bisbisinuosum \ Smetana A. & Shavrin A.V. des. 2016” [red rectangular printed label] ( NSMT) .

Paratypes (39 specimens): 6 Ƌ, 3 ♀: same data as the holotype (5 Ƌ, 2 ♀: NSMT, 1 Ƌ, 1 ♀: CSH) ; 11 Ƌ [plastic plate with of aedeagus, abdominal tergite VIII and sternite VIII of 3 males in Canadian was pinned under the plate with beetle; genital segment was glued on the same plate under the beetle], 17 ♀ [plastic plate with abdominal tergite VIII, sternite VIII and genital segment in Canadian balsam was pinned under the plate with beetle]: “P.R. CHINA, Sichuan, \ NE slope Gongga Shan \ N29°52ʹ10ʹʹ E102°02ʹ \ 01ʹʹ, 12.vi.2011, 3620m, \ sift16, V.Grebennikov ” [rectangular printed label] (7 Ƌ, 11 ♀: NSMT; 3 Ƌ, 2 ♀: CSH; 1 Ƌ, 1 ♀: CNC; 1 ♀: NMPC; 1 ♀: NHHM; 1 ♀: NME; 1 ♀: BMNH) ; 1 Ƌ: “P.R. CHINA, Sichuan, \ NE slope Gongga Shan , \ N29°50ʹ50ʹʹ E102°02ʹ \ 28ʹʹ, 09.vi.2011, 3170m, \ sift14, V.Grebennikov ” [rectangular printed label] ( NSMT) ; 1 ♀: “P.R. CHINA, Sichuan, \ NE slope Gongga Shan \ N29°47ʹ49ʹʹ E102°03ʹ \ 46ʹʹ, 14.vi.2011, 2684m. \ sift 18. V. Grebennikov” [rectangular printed label] ( NSMT). All paratypes with our additional label: “ PARATYPE \ Deinopteroloma \ bisbisinuosum \ Smetana A. & Shavrin A.V. des. 2016” [red rectangular printed label].

Description. Measurements (n=40): HW: 0.85−0.90; HL: 0.54−0.60; OL: 0.23−0.25; AL (holotype): 1.68; PL: 0.75−0.80; PW: 1.31−1.39; ElL: 2.45−2.60; EW: 1.60−1.75; AedL: 1.40−1.45; TL: 3.85−4.32 (holotype: 4.24).

Body reddish brown, head often darker, lateral sides of pronotum and apex of elytra usually paler, each elytron behind middle at suture with inconspicuous, irregular yellow brown small spots; mouthparts rufotestaceous to testaceous, antennae rufotestaceous, gradually darkened from about antennomere 5 or 6, legs rufobrunneous. Dorsal surface of body shiny, without microsculpture except head with rudiments of striate microsculpture on clypeus and well visible transverse lines on vertex and frons. Middle part of clypeus with several coarse punctures, lateral portion of head densely and rather coarsely punctate; disc of pronotum with coarse irregular punctation on medial elevation and with finer and denser punctation along posterior pronotal margin and onto bottom of each divergent longitudinal impression; scutellum without punctures; each elytron with sutural stria represented by row of serial punctures along suture and with five more or less regular longitudinal rows of coarse punctures becoming finer and not serially arranged toward apex of each elytron, lateral sides of each elytron after most noticeable longitudinal elevation present coarse scattered not serial punctation. Habitus as in Fig. 1 .

Head 1.5 times wider than long; vertex irregularly elevated, with transverse impression in front of ocelli, infraorbital ridges moderately strong impressed between postero-lateral margins of each eye and ocellus; eyes moderately convex; small sharp postocular ridge situated away from posterior margin of eye, distance equal to about one third of length of eye seen from above; ocelli moderately large, slightly higher than postocular ridges, distance between ocelli visibly larger than distance between ocellus and posterior margin of eye. Antenna reaching one-third of elytral length when reclined; measurements of antennomeres (length/width, holotype): 1: 0.25 × 0.07; 2: 0.15 × 0.05; 3: 0.17 × 0.05; 4−5: 0.15 × 0.05; 6–7: 0.15 × 0.06; 8−9: 0.12 × 0.07; 10: 0.10 × 0.08; 11: 0.17 × 0.08.

Pronotum transverse, 1.7 times as long as wide, considerably wider than head; apical margin wider than posterior margin, sinuately emarginated; anterior angles with sharp, distinctly protruded tooth, lateral margins coarsely crenulate, slightly more narrowed posteriad than anteriad, posterior angles each marked as minute, acute dent; disc of pronotum on about two anterior thirds with irregular medial elevation with indistinct, medial longitudinal impression, elevation bordered posteriorly by irregular roundish impression and posteriolaterally on each side by indistinct, short longitudinal impression divergent anteriad; lateral portions of pronotum broadly explanate and vaguely reflexed, each with deep pit at about middle.

Elytra convex, relatively narrow and elongate, 1.4−1.8 times as long as wide; intervals between rows of punctures with indistinct elevations in apical half of each elytron, most elongated elevations tending along suture, most noticeable longitudinal subhumeral elevation present outside fifth row of serial punctures, strongly expressed in apical portion near shoulders and extended posteriad to almost apical third of elytral length.

Male. First four protarsomeres vaguely dilated. Front tibia impressed ventrally in apical half, slightly triangularly dilated at about middle in lateral view, with longitudinal ventromedial rows of bulbose setae along each margin. Apical margin of abdominal tergite VIII (Fig. 10) slightly sinuate. Apical margin of abdominal sternite VIII (Fig. 16) straight. Aedeagus ( Fig. 22 ) large and long, markedly narrowed in apical third toward moderately rounded apex; parameres symmetrical, very long, markedly exceeding apex of median lobe, each with curved apical portion; internal sac ( Fig. 23 ) with two bisinuate fields of thorns strongly sclerotized in apical portion. Aedeagus laterally as in Fig. 24 .

Female. First four segments of front tarsus not dilated. Front tibia simple, without modification. Apical margin of abdominal tergite VIII ( Fig. 44 ) more or less straight. Apical margin of abdominal sternite VIII ( Fig. 51 ) with very small obtusely angulate emargination. Genital segment as in Fig. 58 .

Differential diagnosis. Based on combination of the general shape of pronotum, location and features of elytral elevations, length of the body, the structure of the male fron tibia, and the general shape of the aedeagus and internal sac, the new species is most similar to D. gracile , known from Shaanxi ( Smetana 2001), but differs from it by the wider pronotum and elytra, by somewhat coarsely crenulate lateral margins of the pronotum with more protruded latero-apical tooth, by the coloration of elytra, by the significantly longer parameres (short and distinctly asymmetrical in D. gracile ) and by details of the structure of the internal sac. For additional details see the key above.

Distribution. The new species is at present known only from the type locality ( Fig. 55 ) in the Gongga Shan range in Sichuan, China.

Bionomics. All specimens were taken by sifting forest floor litter at elevations from 2684 to 3620 m.

Etymology. The specific epithet is a combination of Latin bis (twice) and bisinuosus (double sinuosus). It refers to the two characteristic sclerites of the internal sac of the aedeagus.

Figures

FIGURES 1 – 4. Habitus of Deinopteroloma: 1 — D. bisbisinuatum (holotype), 2 — D. draco (holotype), 3 — D. minor (paratype), 4 — D. rougemonti (paratype). Scale bar: 1.0 mm.

FIGURES 22 – 29. Aedeagus of Deinopteroloma (22, 26 — parameral view, 24, 28 — lateral view) and internal sac (23, 25 — parameral view, 25, 29 — lateral view): 22 − 25: D. bisbisinuatum (paratype), 26 − 29: D. emeicola (paratype). Scale bar: 0.2 mm.

FIGURES 44 – 57. Female abdominal tergite VIII (Figs. 44 − 50) and sternite VIII (Figs. 51 − 57) of Deinopteroloma: 44, 51 — D. bisbisinuatum, 45, 52 — D. draco, 46, 53 — D. emeicola, 47, 54 — D. minor, 48, 55 — D. ruzickai, 49, 56 — D. sextuberculatum, 50, 57 — D. yinyang. Scale bar: 0.2 mm.

FIGURES 58 – 64. Female genital segment of Deinopteroloma: 58 — D. bisbisinuatum, 59 — D. draco, 60 — D. emeicola, 61 — D. minor, 62 — D. ruzickai, 63 — D. sextuberculatum 64 — D. yinyang. Scale bar: 0.2 mm.