Renius Li & Wang

Li, Wenjing, Huo, Lizhi, Ahrens, Dirk, Ren, Shunxiang & Wang, Xingmin, 2017, Reniuscornutus, a new genus and species of Chilocorini from Tibet, China (Coleoptera, Coccinellidae), ZooKeys 678, pp. 121-128 : 121

Renius Li & Wang gen. n.

Type species.

Renius cornutus Li & Wang, sp. n.

Diagnosis.

The genus Renius can be distinguished from other genera of the tribe Chilocorini by the following combination of characters: clypeus distinctly projecting medially in male (Fig. 1 c–d), slightly projecting medially in female (Fig. 1e); antenna composed of 10 antennomeres (Fig. 1f); basal margin of pronotum with distinct border line; prosternal process long, narrow, parallel sided, without carina (Fig. 1j); outer elytral margin strongly reflexed without distinct bead; epipleuron without foveae for the reception of mid and hind legs; abdominal postcoxal lines complete or almost complete, arcuate (Fig. 2 a–b); legs with stout femora, tibiae slender without apical spurs (Fig. 1 m–o); between the coxites with large, subtriangular sclerite (Fig. 2h).

Description.

Body broadly rounded, moderately convex, dorsum and underside glabrous (Fig. 1a). Head large, 0.54-0.56 times pronotal width, covered with short, yellow pubescence. Eyes large, approximately oval, densely faceted, with inner sides subparallel. Clypeus with distinct horn-like projection, both sides of projection with a small subquadrate gap in male (Fig. 1 c–d), in female clypeus with weak projection medially, without any gap (Fig. 1e). Antenna 10-segmented, scape asymmetrical, narrow at basal 1/3, distinctly expand to apical 2/3, pedicel subquadrate, with the same width as scape anteriorly, antennomeres 3-5 gradually broadening and shortening, 5-8 gradually broadening with the same length, antennomere 9 distinctly longer and wider than antennomere 8, terminal antennomere slightly narrower and shorter than antennomere 9, truncate and oblique at apex (Fig. 1f). Mandible unidentate, prostheca distinct, outer margin of mandible slightly curved (Fig. 1h). Terminal maxillary palpomere elongate with sides slightly expanded, apex obliquely truncate (Fig. 1g). Penultimate labial palpomere stout, 1.5 times as wide as and longer than terminal labial palpomere; terminal labial palpomere subconical (Fig. 1i).

Prothorax descending anteriorly (Fig. 1 b–c). Basal margin of pronotum with visible border line. Prosternum T-shaped, in front of coxae distinctly longer than basal width of prosternal process; prosternal process long, narrow, parallel sided, without carina (Fig. 1j). Mesoventrite approximately trapezoidal, with anterior margin straight. Meso and metaventral process narrow, junction straight, with visible suture (Fig. 1k). Postcoxal lines on metaventrite descending laterally. Tendons of metendosternite separated by much less than width of stalk and placed close to middle (Fig. 1l). Scutellum small and triangular. Elytra distinctly wider than pronotum at base; outer elytral margin strongly reflexed without distinct bead; elytral epipleuron distinctly broaden with descending outer portion, without grooves. Abdomen with six ventrites in both sexes; abdominal postcoxal lines complete or almost complete, arcuate (Fig. 2 a–b). Legs with stout femora, tibiae slender, without tibial spurs (Fig. 1 m–o); tarsal claws stout, with trapezoidal basal tooth, about 1/2 length of claw (Fig. 1p).

Etymology.

The generic name is dedicated to the memory of the well-known Chinese entomologist, Ren Shunxiang, who devoted most of his life to the study of Coccinellidae and biological control. Gender masculine.