Oblongocoris 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

Oblongocoris Bai, Heiss & Cai , gen. nov.

Type species. Oblongocoris hainanensis Bai, Heiss & Cai , sp. nov.

Diagnosis. Apterous, of medium size (5.4–5.7 mm), body oblong oval; coloration blackish brown; surface rough, rugose and glabrous; lateral margins of body, legs and antennae with setigerous tubercles; thoracic segments fused to mtg I+II, with a median pentagonal ridge along meso- and metanota which is restricted, depressed and carinate along mtg I+II and flanked by a pair of transverse ridges on mtg I; fusion line between metanotum and mtg I+II marked by a suture; mtg III to VI fused into a subquadrangular tergal plate; spiracles II ventral, III–IV sublateral, IV at most faintly visible from above, V–VII lateral and visible from above.

Oblongocoris gen. nov. resembles Rotundocoris Bai, Heiss & Cai 2019 from Hainan, China, sharing its basic habitus, but is distinguished from the latter by a set of morphological features: in Oblongocoris gen. nov. the lateral margins of the thoracic segments are incrassate, each showing three parallel layers in lateral view; the median deep furrow on the fused mtg I+II is flanked by a pair of transverse ridges on mtg I; and the pro-, meso- and metasterna are fused medially without a visible fusion suture between each other; whilst in Rotundocoris the lateral margins of thorax are not incrassate, showing two layers laterally; mtg I+II are without a pair of transverse ridges on mtg I; and the pro-, meso- and metasterna are fused medially with distinct fusion sutures between each other.

Description. Head longer than width across eyes; genae slender, short; antenniferous tubercles stout, conical, apically pointed; eyes small, semiglobose, with convex face; postocular tubercles small, not protruding; postocular borders converging posteriorly to constricted neck; antennae short and slender, about 1.6 times as long as width of head, first segment longest, third longer than fourth, second shortest, first stout, clavate, second and third cylindrical, fourth fusiform; rostrum arising from a slit-like opening of atrium, not reaching limits of rostral groove.

Thorax and mtg I+II. Pronotum strongly attenuated anteriorly, anterolateral angles rounded, granular, not protruding beyond collar, disc with medial groove. Meso- and metanota separated only laterally, with median pentagonal ridge, anterior surface on half length of ridge with a median shallow longitudinal sulcus, posterior surface of ridge smooth; metanotum with deep furrows adjacent to medial ridge, separated from mtg I and II by thin suture; lateral margins of thorax incrassate, showing three parallel layers laterally, with deep cleft between pro-, meso-, and metanota; mtg I+II fused, with a deep median groove with a thin longitudinal carina flanked by a pair of transverse elevated ridges and further laterad with a pair of large subtriangular deeply excavated depressions.

Abdomen. Mtg III to VI fused into a subquadrangular tergal plate, anterior margin straightly elevated on median line with usual pattern of large and small callous spots and dots; mtg VII elevated posteriorly in female; deltg II+III completely fused, spiracles II ventral, III–IV sublateral, V–VII lateral on dorsally reflexed vltg V–VII and visible from above; ptg VIII dentiform.

Venter. Pro-, meso- and metasterna fused, flattened medially, smooth. Thoracic sterna with conical processes pointing to coxae.

Etymology: The generic name is composed of the Latin prefix oblongo - formed from the adjective oblongus, - a, - um, referring to the oblong habitus of the only included species, and the latinized Greek noun coris meaning bug. Gender masculine.

Distribution: China (Hainan).