Paralibiocoris heissi (Bai, Yang & Cai, 2006) Bai, Yang & Cai, 2006

Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2018, The Oriental flat bug genus Libiocoris Kormilev, 1957 revisited: re-examination, synonymy, and description of a new genus (Heteroptera, Aradidae), ZooKeys 789, pp. 115-137 : 118-119

Paralibiocoris heissi (Bai, Yang & Cai, 2006) comb. n. Figs 1-4, 5-17

Libiocoris heissi Bai, Yang & Cai 2006: 41, figs 1, 3-7 (CAU).

Libiocoris sinensis Bai, Yang & Cai 2006: 43, figs 2, 8-12 (CAU) syn. n.

Type material.

Holotype (♀): China, Hainan, Baisha, Yinggeling, 1050 m, 10.IX.2005, L. S. Chen leg. (EMIH). Additional material examined. ♂, China, Hainan, Baisha,Yinggeling, 950 m, 2.VIII.2007, Bai X.S.; ♂, China, Hainan, Wuzhi mountain, 8.V.2008, Bai X.S.; ♀, China, Hainan, Baisha,Yinggeling, 950m, 2.VIII.2007, Bai X.S.; 2♀, China, Hainan, Ledong, Jianfengling, 900 m, 21.VII.2004, Wu Jie (EMIH, CAU); ♂,♀ China, Baisha, / Yinggeling 1200 m / 19°03'16"N, 109°33'53"E /2.VIII.2007, Bai X.S. (CEHI ex CAU).

As both taxa were described on single females and males are now available, the holotype of heissi is redescribed and additional features of the male added.

Diagnosis.

As generic description.

Redescription.

Apterous female, incrustation removed to recognise dorsal structures.

Head. Slightly longer than wide across eyes (1.0/0.9); clypeus short reaching basal one-third of first antennal segment, strongly raised anteriorly, with tubercle near apex; genae slightly produced over clypeus; antenniferous tubercles short, dilated, apices acute, diverging anteriorly; antennae 2.1 times as long as width of head across eyes, length of antennal segments I to IV = 0.65, 0.30, 0.65, 0.30; eyes small, not protruding; postocular tubercles small but distinct, not reaching outer margin of eyes; postocular borders behind tubercles straight and converging to constricted collar; vertex with Y-shaped granulate carina flanked by two(1+1) large, ovate infraocular callosities; rostrum short, rostral groove wide and deep, closed posteriorly.

Pronotum. 2.8 times as wide as long (1.4/0.5); collar narrow, anterolateral angles produced forward beyond collar as two (1+1) large, blunt, granulate lobes; disc with a longitudinal median furrow flanked by ovate callosities; posterior margin of pronotum slightly convex posteriorly, separated from mesonotum by a deep furrow.

Mesonotum. Wider than pronotum, separated from metanotum by two (1+1) deep furrows laterally; across meso- and metanota medially with an elongate, subpentagonal bottle-shaped ridge, 1.53 times as long as wide (0.87/0.57), subrounded anteriorly and truncate posteriorly, smooth and without longitudinal sulcus; lateral of median ridge disc with four (2+2) longitudinal sclerites, lateral margins granulate.

Metanotum. Wider than mesonotum; separated from fused mtg I+II by a slightly sinuate thin sulcus; lateral of median ridge with two (1+1) large subtriangular callosities, 2 (1+1) longitudinal ridges lateral of callosity discs, lateral margins granulate, similar to those of mesonotum.

Abdomen. Mtg I and II completely fused, depressed at middle, there with a median longitudinal ridge laterally separated by deep furrows from wide oblique lateral plates, sloping posteriorly and sideways, further laterally with two (1+1) large subtriangular depressions; tergal plate with a slightly raised median ridge on mtg III, a pentagonal elevation on mtg IV then tapering posteriorly.

Venter. Sterna III to VI raised along posterior border, depressed along anterior border, and with triangular, smooth spots medially, flanked by two (1+1) large, transversely ovate depressions, these bearing two (1+1) round callous spots; laterally four (2+2) smaller round callous spots present; spiracles II ventral, III–VIII lateral and visible from above.

Legs. Long and slender, without spines, preapical comb on fore tibia present, femora subcylindrical, claws with fine pulvilli.

Male. Morphological features similar to female but of smaller size. Head as long as wide across eyes; median plate of meso- metanotum more elongate 1.82 times as long as wide (0.73/0.40); mtg VII strongly elevated posteriorly; reflexed vltg VII forming triangular lobes posterolaterally, ventral side with a distinct oblique smooth callus, reaching lateral margin; ptg VIII short and clavate much shorter than cordate pyriform pygophore (Figs 13, 14); parameres slender (Figs 15-17).

Measurements

[in mm, ♂(n = 2)/♀ (n = 3), holotype in parentheses]. Body length 4.4-4.45/5.1-5.8 (5.6); maximal width of abdomen 2.05-2.2/2.65-3.05 (3.05). Head length 0.8-0.85/0.9-1.05 (1.0), width 0.8/0.8-0.95 (0.9). Pronotum length 0.4/ 0.45-0.5 (0.5), width 1.15-1.2/1.3-1.45 (1.4). Mesonotum width 1.5-1.6/1.7-1.95 (1.8). Metanotum width 1.8-1.9/2.05-2.3 (2.25). Length of antennal segments I–IV = 0.60, 0.25, 0.60, 0.30/0.6-0.7, 0.3-0.35, 0.6-0.7, 0.3-0.35 (0.65, 0.30, 0.65, 0.30).

Distribution.

China (Hainan).

Comments.

As the generic characters and diagnosis are valid for all hereafter described new congeneric taxa, common features are not repeated except those differing in structure of thoracic median plate, size, and measurements distinctive for the specific taxa.