Liangcoris Zhao, Cai & Ren

Zhao, Ping, Cai, Wanzhi & Ren, Dong, 2007, Liangcoris, a new genus of Harpactorinae (Hemiptera: Reduviidae) from China, Zootaxa 1405, pp. 63-68 : 63-64

Liangcoris Zhao, Cai & Ren , gen. nov.

Type species. Liangcoris yangae Zhao, Cai & Ren , sp. nov.

Diagnosis. Medium sized, oblong, smooth, shiny. Head (including neck) distinctly shorter than pronotum ( Fig. 1 ); eyes large, protruding laterally; ocelli widely separated; anteocular portion slightly shorter than postocular portion (including neck); first antennal segment nearly as long as head ( Fig. 1 ); rostrum robust and recurved, second segment nearly as long as first, apical segment shortest. Pronotum with anterior lobe longer than half of posterior; anterior pronotal lobe developed, longitudinal median depression short, neither reaching collar anteriorly nor transverse constriction of pronotum posteriorly ( Fig. 1 ); posterior pronotal lobe with disk distinctly depressed, longitudinal depression, which not reaching posterior margin of pronotum ( Fig. 1 ); lateral pronotal angles rounded, posterior margin of pronotum slightly convex, posterior angles rounded; mesopleuron without a tubercular process near border of anterior margin; scutellum nearly triangular and unarmed; femora incrassate and subapical portion constricted, fore femora thickest. Abdomen slightly dilated laterally.

Distribution. China.

Etymology. The new generic name refers to the shiny surface of the new species. “Liang” in Chinese means bright and shiny, and “coris” in Greek means bug. Masculine.

Remarks. The body of the new genus is smooth and shiny, which is distinctly different from that of all morphologically similar genera. The general body plan and the middle longitudinal sulcus on the anterior pronotal lobe resemble those of the genus Rhynocoris , but in the new genus the first antennal segment is subequal to the head and the femora are moderately thickened (vs. in Rhynocoris , where the first antennal segment is longer than head, mid and hind femora are not distinctly incrassate). The new genus is allied to Coranus in first antennal segment subequal in length to head, but mesopleuron lacks a tubercle near border of anterior margin, the scutellum is unarmed, and legs are unnodulose in new genus (vs. the mesopleuron has a tubercle near border of anterior margin, the scutellum is armed, and legs are nodulose in Coranus ). The new genus is similar to Stalireduvius: the first antennal segment is subequal in length to the head and the mesopleuron lacks a tubercle near border of anterior margin; but the new genus can be separated from the latter in legs are unnodulose (vs. the legs nodulose in Stalireduvius). These four genera can be distinguished with the following key.

Figures

FIGURE 1. Liangcoris yangae sp. nov., Ψ. Habitus. Scale bar = 1.67 mm.