Carcinops penatii Zhang & Zhou

Zhang, Ye-Jun & Zhou, Hong-Zhang, 2007, Taxonomy of the tribe Paromalini Reitter (Coleoptera: Histeridae, Dendrophilinae) from China, Zootaxa 1544, pp. 1-40 : 5-7

Carcinops penatii Zhang & Zhou , n. sp.

(Figs. 1–14)

Type material. Holotype. CHINA: Yunnan: male, Heishui, 35 km N Lijiang, 1993. VI.18–VII.4, S. Becvar coll.; Paratypes. CHINA: Yunnan: 1 male, 5 females, same data as holotype; 4 males, 1 ex., Heishui, 35 km N Lijiang, 1992. VII.1–19, S. Becvar coll.; Sichuan: 3 females, Baoxing, Guobayan, 2668 m, dead birch, 2003. VIII.7, Jie Wu coll.

Description. Body length 1.81–1.99 mm, body width 1.28–1.42 mm. Body elongate oval, moderately convex, black and glossy, legs and funicles of antennae rufous, clubs of antennae flavotestaceous.

Head (Fig. 1) nearly flat anteriorly. Surface densely and finely punctate, fine punctures mixed with large round punctures near posterior margin. Frontal stria conspicuous, curved roundly along anterior margin, and interrupted above antennal bases.

Pronotum (Fig. 2) with sides arcuate and convergent anteriad, slightly so in posterior half and strongly so in anterior half; anterior margin emarginate and bisinuate behind head. Marginal pronotal stria complete along anterior and lateral margins, lateral marginal stria strongly carinate. Surface densely and finely punctured, intermingled irregularly with large round punctures, these large punctures fewer medially; a row of larger punctures extending sparsely along posterior margin. Antescutellar area with shallow, round and large concave. Midline finely impressed, indicated by a row of dense and fine punctures.

Scutellum triangular in dorsal view.

Elytra (Fig. 2) with sides slightly arcuate. First to 5th dorsal striae more or less abbreviated apically, impressed with coarse punctures; 1st to 3rd dorsal striae relatively long, deep, coarsely crenate; 4th and 5th dorsal striae relatively thin, usually punctiform near the middle and abbreviated in apical 1/9; sutural stria similar to 5th dorsal stria, its apical end running beyond the latter but its basal end not; oblique humeral stria feebly impressed in basal 1/4; internal subhumeral stria finely impressed in apical 2/3, its basal end beginning from 1st dorsal stria and apical end attaining external subhumeral stria; external subhumeral stria complete. Surface of elytra with punctures sparser and finer than those of pronotum, but mixed with large punctures near apical margin, narrow band along the apical margin impunctate and smooth. Epipleura coarse, sparsely and finely punctate; marginal epipleural stria complete and feebly interrupted in middle; marginal elytral stria complete, coarsely punctured and strongly curved in middle, its apical end attaining elytral apical margin but not extending along the margin.

Propygidium (Fig. 2) densely and finely punctate, mixed with large punctures, which are smaller than the large punctures on elytral apex. Pygidium (Fig. 2) convex posteriorly, punctures in anterior 1/3 similar to those of propygidium, and even denser posteriorly, the large punctures relatively smaller than those of propygidium and even smaller posteriorly.

Prosternal lobe (Fig. 3) with anterior margin broadly rounded; marginal stria thin, only observable along anterior margin; surface densely and moderately punctate, punctures smaller and sparser laterally, interstices of punctures with alutaceous microsculptures. Prosternal keel (Fig. 3) with two carinal striae complete and sparsely punctured, straight and feebly divergent posteriad, their posterior ends united with each other; surface with punctation similar to that of prosternal lobe, but less dense. Lateral prosternal stria short and strongly carinate.

FIGURES 1–14. Carcinops penatii Zhang & Zhou , n. sp. 1. Head, frontal view; 2. Pronotum, elytra, propygidium and pygidium; 3. Prosternum, meso- and metaventrite, and the first visible abdominal sternum; 4. Protibia, dorsal view; 5. Mesotibia, dorsal view; 6. Metatibia, dorsal view; 7–8. Aedeagus, dorsal and lateral views; 9–11. Male 8th tergite and 8th sternum, lateral, dorsal and ventral views; 12–13. Male 9th and 10th tergites and 9th sternum, lateral and dorsal views; 14. Male 9th sternum, ventral view. Scale bars: 2, 3 = 0.5 mm; 1, 4–14 = 0.25 mm.

Mesoventrite (Fig. 3) with anterior margin moderately emarginated medially. Marginal mesoventral stria complete and carinate, densely punctate, its anterior part curved posteriad in middle and running parallel to anterior margin, its lateral parts extending postero-laterally, both ends connected with lateral metaventral striae; another curved and short stria present near anterior angle. Surface densely and finely punctured, intermingled with several relatively large punctures. Meso-metaventral suture nearly straight, feebly impressed and complete.

Intercoxal disk of metaventrite (Fig. 3) slightly convex medially, densely and finely punctate, punctures becoming sparser in lateral 1/3 where they intermingled with many large round punctures. Metaventral longitudinal suture absent. Two lateral metaventral striae impressed at each side, the inner striae strongly carinate and impressed with coarse and dense punctures, curved and extending postero-laterally through anterior 2/3; the outer striae relatively thin and sparsely crenate, end anteriorly of the inner striae; intervals between inner and outer striae with scattered microscopic punctures and a row of large punctures. Lateral disk slightly concave, with scattered fine and large punctures, interstices between punctures covered with alutaceous microsculptures. Post-mesocoxal stria running along posterior margin of mesocoxa, and then bending posteriad.

Intercoxal disk of the first visible abdominal sternum (Fig. 3) with dense and large punctures, somewhat smaller anteriorly and mixed with fine punctures. Two pairs of lateral striae deeply impressed and coarsely crenate, inner striae complete and sinuate, outer striae shorter, running parallel to posterior 2/3 of the inner striae.

Protibia (Fig. 4) dilated, its outer margin in apical half with two large denticles, distant from each other, in basal half with about ten tiny denticles. Mesotibia (Fig. 5) with outer half explanate, outer margin nearly glabrous, but with three spinules (two near apex and one in basal part, distant from the first two). Metatibia (Fig. 6) with outer half explanate, outer margin nearly glabrous, but with two spinules near apex.

Male genitalia as in Figs. 7–14.

Remarks. This new species can be easily distinguished from all congeneric species by the following characters: mesotibia and metatibia with outer halves explanate and outer margins nearly glabrous; carinal striae on prosternum straight and nearly parallel.

Distribution. China (Yunnan, Sichuan).

Etymology. The species is named in honor of Dr. Fabio Penati (Museum of Natural History, Genoa, Italy).