Paralibiocoris hainanensis, Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2018

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 : 123-125

Paralibiocoris hainanensis sp. n. Figs 39-42, 43-51, 52-59

Type material.

Holotype (♂): China, Hainan, Jianfeng, Tianchi, 810 m, 16.VIII.2007, Zhang & Bai; (EMIH). Paratypes: 2♂, China, Hainan, Changjiang, Bawangling, 13.IX.2008, Zhang W. J.; 2♂, 3♀ China, Hainan, Jianfeng, Tianchi, 810 m, 16.VIII.2007, Zhang & Bai; 3♂, China, Hainan, Tongzha, Wuzhishan, 6.V.2009, Zhang & Yang; ♂, China, Hainan, Wanning, Shimeiwan, 12.VIII.2007, Bai, X. S.; ♀, China, Hainan, Jianfeng, Nanya, 644 m, 22.VIII.2007, Bai, X. S. (EMIH); 2♂,2♀ collected with holotype (CEHI ex CAU).

Diagnosis.

General aspect similar to Paralibiocoris heissi , but distinguished from the latter by the wider pronotum, 2.91 times as wide as long (2.80 in P. heissi ) and more rounded less produced anterolateral lobes (produced and blunt), shorter anten nae 1.89 times as long as width of head (2.1) and by posterolateral angles of deltg V to VII slightly protruding and rounded in female. Paralibiocoris hainanensis sp. n. differs from P. roundangulus sp. n. and P. limuensis sp. n. by a different shape of the median ridge of meso- and metanotum (Figs 43, 45 vs. Figs 22, 24 and Figs 64, 66, respectively) and antennal segment I as long as III (III shorter than I).

Description.

Male. Basic morphological structures as of P. heissi and other congeners. Head. Slightly longer than wide across eyes (0.8/0.78); antennae 1.89 times as long as width of head across eyes, length of antennal segments I to IV = 0.47, 0.24, 0.47, 0.30.

Pronotum. 2.91 times as wide as long (1.25/0.43); collar narrow; anterolateral lobes produced forward beyond collar as two (1+1) widely rounded granulate lobes; disc with a longitudinal median furrow flanked by 2 (1+1) large, subtriangular and smaller callosities, lateral margin granulate, converging anteriorly.

Mesonotum. Wider than pronotum (1.60/1.25); separated from metanotum by two (1+1) deep furrows laterally; across meso- and metanota medially with an elongate, smooth bottle - shaped plate as P. heissi , 1.63 times as long as wide (0.70/0.43).

Metanotum. Wider than mesonotum (1.80/1.60); separated from mtg I by a slightly sinuate thin sulcus.

Abdomen. Mtg I and II completely fused, disc depressed at middle with a flat rectangular sclerite separated from lateral ovate plates by deep furrows; tergal plate with a slightly elevated granulate ridge which is widest on mtg III, sloping posteriorly; pygophore elongate cordate, surface rugose (Figs 55, 56); parameres slender (Figs 57-59).

Venter. Vltg VII with a small shiny callus, near spiracle VII; spiracles II ventral, III–VIII lateral and visible from above.

Female. Morphological features similar to male but of larger size. Head slightly longer than wide across eyes (0.80/0.78); length of antennal segments I to IV = 0.46, 0.27, 0.46, 0.33; pronotum wider than long (1.27/0.43); width of mesonotum 1.60; bottle-shaped median thoracic plate 1.56 times as wide as long (0.67/0.43); width of metanotum 1.93.

Measurements

[in mm, ♂ (n = 9)/♀ (n = 4), holotype in parentheses]. Body length 3.65-4.2/4.2-4.55 (4.2); maximal width of abdomen 1.75-2.1/2.2-2.4 (2.1). Head length 0.7-0.8/0.75-0.8 (0.8), width 0.65-0.78/0.7-0.78 (0.78). Pronotum length 0.35-0.43/ 0.4-0.45 (0.43), width 1.05-1.25/1.2-1.3 (1.25). Mesonotum width 1.4-1.6/1.45-1.6 (1.6). Metanotum width 1.5-1.8/1.65-1.9 (1.8). Length of antennal segments I–IV = 0.44-0.47, 0.24, 0.44-0.47, 0.3/0.47, 0.24-0.27, 0.47, 0.3-0.34 (0.47, 0.24, 0.47, 0.3).

Etymology.

The name refers to the Island of Hainan, the type locality.

Distribution.

China (Hainan).