Ramivena Fan & Liu, 2010

Fan, Zhong-Hua & Liu, Guo-Qing, 2010, A new genus Ramivena (Hemiptera: Pentatomidae), with descriptions of two new Species, Oriental Insects 44 (1), pp. 211-223 : 211-212

Ramivena Fan & Liu , gen. nov.

Type species. Ramivena nigrivitta , sp. nov.

Diagnosis: This genus appears to be related to Pentatoma Olivier , but distinctly differs in having the ramified veins on the hemelytral membrane, trapeziform pronotal lateral angles, trifurcate parameres, unique conjunctiva and absence of dorsal sclerotized processes in aedeagus.

Description: Elongate oval. Dorsal surface ochraceous, mottled with irregular dark patches mainly on pronotum and scutellum, and small pale patches scattered on the whole dorsum.

Head slightly wider than long, and narrowing to the blunt apex. Mandibular plates equal to or only slightly longer than clypeus in length. Antennal segment I nearly reaching the apex of head, segments II and III subequal in length. Pronotum more than 2x wider than long, its anteriolateral margins concave and mostly coarsely dentate; its lateral angles produced, quadrate or trapeziform with truncated apices. Veins on the membrane of hemelytra distinctly dark brown in contrast with the backgrounds, apices of which further shortly branched, thus giving a ramified appearance. Buccula with the anterior angle triangularly pointed. Body beneath and legs spotted black. Scutellum longer than wide, its apex more or less angular and black. Mesosternum distinctly carinate. Tibiae sulcate. Tarsi 3 segmented. Abdominal base spined.

Male genitalia: Ventral margin of pygophore with several triangular, flat processes. Lateral aspects of pygophore bifurcated in lateral view. Paramere distinctly trifurcate at apex. Aedeagus without dorsal sclerotized processes. Conjunctiva united and without any developed lobes, apex of these swollen and sclerotized ventrally and apically. Vesica slim, about equal to the apex of median penial plate in length.

Female genitalia: Scattered with black spots. Inner margins of I gonocoxites apart from each other at base and then getting close backwards, forming an inverted triangle.

With these unique characters, five species are included here, with two new species and three new combinations, R. emeiensis (Ling) , R. mosaica (Hsiao & Cheng) and R. zhengi (Rider) which are transferred from Pentatoma Olivier.

Etymology: “ Rami- ” means ramified and “ –vena ” means vein. It is named after the character of ramified veins on the hemelytral membrane and it’s feminine.

A. Key to species

1. Body length 18 mm or more...................................................... R. emeiensis (Ling) Body length 13-15 mm ............................................................................................ 2

2. Ostiolar peritreme about as long as half the width of evaporate area .................... 3 Ostiolar peritreme shorter than 1/3 width of evaporate area .................................. 4

3. Pronotal lateral angles not red apically at edge, one distinct pale spot behind each callus .................................................................. R. mosaica (Hsiao & Cheng) Pronotal lateral angles red apically at edge, without distinct pale spot behind each callus .................................................................. R. parazhengi Fan & Liu , sp. nov.

4. Posterior margin of pronotal lateral angle distinctly pale white and impunctate…................................................................................ R. zhengis (Rider) Posterior margin of pronotal lateral angle not pale white and punctate…………… …………............................................................... R. nigrivitta Fan & Liu , sp. nov.