Oblongocoris hainanensis Bai, Heiss & Cai, 2020

Shi, Kai, Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2020, A new apterous genus of Carventinae from China (Hemiptera: Heteroptera Aradidae), Zootaxa 4820 (2), pp. 385-390 : 386-389

Oblongocoris hainanensis Bai, Heiss & Cai sp. nov.

( Figs. 1–6 )

Type material: Holotype: ♀, China, Hainan, Jianfeng, Tianchi , 16.viii.2007, leg. X.S. Bai & W.J. Zhang ( IMNU) . Paratype: 1 ♀, as holotype ( CEHI). The specimens are provided with type labels accordingly .

Description. Female. Body blackish brown; eyes reddish; antenna and legs covered with adpressed setae; surface of head, thorax and connexiva granulate and irregularly carinate.

Head slightly longer than width across eyes (1.16: 1.05); genae slightly notched anteriorly, reaching basal third of first antennal segment; clypeus strongly raised anteriorly, with a tubercle near apex; antenniferous tubercles short, dilated, apices acute; antennae 1.55 times as long as width of head across eyes, length of antennal segments I to IV = 0.61: 0.31 0.37: 0.34; eyes small, convex laterally; postocular tubercles small and not protruding, postocular borders constricted posteriorly; vertex with granulate carinae flanked by a pair of large, ovate infraocular callosities, interocular surface with irregular carina; rostrum short, rostral groove wide, deep, closed posteriorly.

Pronotum 2.92 times as wide as long (1.90: 0.65), strongly attenuated anteriorly; collar thick, as long as wide as base of first antennal segment; anterolateral angles slightly produced and forming round lobes, granulate, reaching to anterior margin of collar; disc with median groove, flanked by a pair of subtriangular sclerites, shining, with conical tubercles and laterad with a pair of subrectangular plates with irregular callosities and granulate lateral margins; posterior margin of pronotum slightly convex posteriorly, separated from mesonotum by a deep furrow.

Mesonotum wider than pronotum (2.25: 1.90); separated laterally from metanotum by very deep furrows; medially across meso- and metanotum with an elongate pentagonal ridge, pointed anteriorly and truncate posteriorly, anterior surface at half length of ridge with median shallow longitudinal suclus, posterior surface of ridge smooth, flanked by deep furrows; laterad of median ridge with a pair of subrectangular plates with irregular callosities and granulate carinae along lateral margin.

Metanotum wider than mesonotum (2.55: 2.25); separated from fused mtg I+II by a slightly sinuate thin sulcus; laterad of median ridge with a pair of subtriangular sclerites and a pair of large subrectangular plates with irregular callosities, lateral margins granulate like those of mesonotum.

Abdomen: mtg I and II completely fused, depressed at middle, with a median longitudinal carina on the bottom of depression flanked by a pair of transverse elevated ridges and wide smooth oblique lateral plates, sloping posteriorly and sideways, further laterad with a pair of large subtriangular deeply excavated depressions; tergal plate subquadrangular, posterior margin truncate, lateral margins slightly rounded, median ridge highly raised on mtg III followed by a subpentagonal elevation on mtg IV, then tapering posteriorly; laterad of median ridge with the usual pattern of large and small callous spots; deltg II+III completely fused, deltg IV–VII separated by fine sulci; posterolateral angles of deltg VII slightly protruding, triangular; ptg VIII dentiform.

Venter: sterna III–VI raised along posterior margin, depressed along anterior border with triangular smooth spots medially, flanked by a pair of large, transversely ovate shallow depressions and a pair of round callous spots of usual pattern; spiracles II ventral, III to IV sublateral and only partly faintly visible from above, V–VII lateral, placed on dorsally reflexed rim of vltg V–VII and visible from above, VIII terminal.

Legs slender, preapical comb on fore tibia present, claws with fine pulvilli.

Measurements. Holotype: body length 5.70; maximal width of abdomen 2.90; length of head 1.16, width 1.05; length pronotum 0.65, width 1.90; width of mesonotum 2.25; width of metanotum 2.55; lengths antennal segments I–IV = 0.61, 0.31, 0.37, 0.34. Paratype: body length 5.40.

Etymology: The specific epithet hainanensis refers to Hainan where the holotype was collected; adjective.

Distribution: China (Hainan).

Figures

FIGURES 1–2. Oblongocoris hainanensis gen. nov., sp. nov., holotype female. 1, dorsal view; 2, ventral view. Scale bar = 1.0 mm.

FIGURES 3–6. Oblongocoris hainanensis gen. nov., sp. nov., head and thorax (3, 4) and abdomen (5, 6). 3, 5: dorsal view; 4, 6: ventral view.Arrows indicate the transverse ridges on mtg I (Fig. 5) and fusion sutures between meso- and metasterna (Fig. 6). Scale bar = 0.5 mm.