Deinopteroloma yinyang Shavrin & Smetana

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 : 247-248

Deinopteroloma yinyang Shavrin & Smetana , sp.n.

( Figs. 9 , 50, 57 , 64 , 65−66 )

Type material examined: Holotype ♀ [specimen without right fore leg; apical abdominal segment was glued to the same plate under the beetle]: “P.R. CHINA, Sichuan, \ Emei Shan, N 29°34ʹ46ʹʹ \ E103°22ʹ04ʹʹ, 27.v.2011, \ 1463m, \ sift07, V.Grebennikov ” [rectangular printed label], “ HOLOTYPE \ Deinopteroloma \ yinyang sp. n. \ Shavrin A.V. & Smetana A. des. 2016” [red rectangular printed label] (temporarily in CNC, to be eventually deposited in IZAS) .

Paratype: 1 ♀ [plastic plate with abdominal tergite VIII, sternite VIII and genital segment in Canadian balsam was pinned under the plate with beetle; specimen without right middle leg]: same data as the holotype, with additional red rectangular printed label: “ PARATYPE \ Deinopteroloma \ yinyang sp. n. \ Smetana A. & Shavrin A.V. des. 2016” ( CSH) .

Description. Measurements (n=2): HW: 0.95; HL: 0.60; OL: 0.27; AL (holotype): 1.66; PL: 0.80−0.86; PW: 1.45; ElL: 2.42−2.56; EW: 1.74−1.78; TL: 4.25 (holotype)−4.31.

Head and elytra dark reddish brown; antennomeres 5−11, legs and pronotum reddish brown except yellowbrown tarsi and lateral margins of pronotum; latero-apical and middle portions of elytra yellow brown. Dorsal surface of body shiny, without microsculpture except apical part of clypeus with indistinct transverse rudimentary lines. Middle part and posterior part of infraorbital ridges of head with very sparse and irregular punctation, with Yshaped transverse series of punctures situated in narrow impression; disc of pronotum with coarse irregular punctation on middle elevation, significantly larger and deeper than that on head, with denser punctation along posterior pronotal margin and sparser in apical third of middle elevation, lateral portions of pronotum with distinct row of large punctures along margin; scutellum with a few small punctures; elytra with dense, larger and deeper punctation than that on head, disc of each elytron with four longitudinal more or less distinctly serial punctures becoming not serially arranged toward basal and apical parts, punctation of lateral portions of each elytron not serial. Habitus as in Fig. 9 .

Head 1.5 times as wide as long; posterior part of clypeus and vertex with small irregular elevation and indistinct midlateral impressions, infraorbital ridges slightly impressed; eyes large and convex; postocular ridge situated away from posterior margin of eye, distance about one third of length of eye seen from above; ocelli large, situated at same level of posterior ridges, distance between ocelli distinctly longer 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 × 0.10; 2: 0.15 × 0.07; 3−4: 0.17 × 0.05; 5: 0.15 × 0.06; 6−7: 0.12 × 0.06; 8: 0.11 × 0.06; 9−10: 0.11 × 0.07; 11: 0.20 × 0.09.

Pronotum transverse, 1.6−1.8 times as wide as long; apical and posterior margins of pronotum of about same width, anterior one distinctly emarginated; anterior angles with short, obtuse tooth, lateral margins slightly more narrowed posteriad than apicad, with irregular, moderately coarse crenulation, with acute posteriolateral angles; disc of pronotum with wide middle elevation, with distinct, wide longitudinal and irregular semicircular impression in basal third of pronotum between two oval oblique protuberances; lateral portions of pronotum explanate and reflexed, each with deep pit at about middle.

Elytra 1.3−1.4 times as long as wide; each elytron with very distinct, slightly protruding rounded shoulder; surface of each elytron with distinct, narrow sutural elevation slightly widened apicad and with irregular small tubercles, arranged in three longitudinal rows, each consisting of three tubercles in basal third of disc of elytron (row of tubercles near shoulder narrower and more convex), with three oval convex tubercles in middle part and with 2-3 very indistinct tubercles in apical half, lateral sides of apical third of each elytron with three indistinct, very small tubercles.

Male unknown.

Female. Apical margins of abdominal tergite VIII ( Fig. 50 ) and sternite VIII ( Fig. 57 ) rounded. Genital segment as in Fig. 64 .

Differential diagnosis. Based on the bicoloured elytra, on the general proportions of the body, on the strongly crenulated lateral margins of the pronotum and on the character of elevations of the pronotum and elytra, the new species is most similar to D. uncinatum , described recently from the Northern Vietnam ( Assing 2015), from which it differs by the smaller body and paler elytra, by the basal margin of each elytron with distinctly protruding shoulder, and by more distinct tubercles on the elytra.

Distribution. Deinopteroloma yinyang sp.n. is known from the Emei Shan range ( Figs. 65−66 ) in Sichuan, China.

Bionomics. All specimens were taken by sifting forest floor litter at elevation 1463 m a.s.l.

Etymology. The name of the species comes from symbol of natural equilibrium yin and yang which in Chinese philosophy describes opposite or contrary forces are interconnected and interrelate to one other; it refers to the coloration of elytra.

Figures

FIGURES 65. Distribution of Deinopteroloma: D. bisbisinuatum (black circle), D. draco (white circle), D. emeicola (black square), D. minor (white square), D. rougemonti (black triangle), D. ruzickai (white triangle), D. sextuberculatum (black star), D. vesiculosum (white star), D. yinyang (white rhomb). Rectangular are shown in more detail in Fig. 66.

FIGURE 66. Distribution of Deinopteroloma in Emei Shan Mts., China (detail of rectangle in Fig. 65): D. emeicola (black circle), D. minor (white circle), D. ruzickai (black triangle), D. sextuberculatum, D. yinyang (white rhomb).

FIGURES 6 – 9. Habitus of Deinopteroloma: 6 — D. ruzickai (holotype), 7 — D. sextuberculatum (paratype), 8 — D. vesiculosum (holotype), 9 — D. yinyang (holotype). Scale bar: 1.0 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.