Cuspidevia brevis, Bian, Dongju & Ji, Lanzhu, 2010

Bian, Dongju & Ji, Lanzhu, 2010, Two new species of Cuspidevia Jäch & Boukal, 1995 from China (Coleoptera: Elmidae), Zootaxa 2663, pp. 53-58 : 54

Cuspidevia brevis sp. nov.

(Fig. 1–3, 7–8, 11–13)

Type material. Holotype (IAECAS), male, CHINA: Jiangxi, Ji’an City, Suichuan County, Caolin Town, 26°15.851’N 114°21.969’E, 208 m, 3. X. 2009, leg. Bian & Tong (loc. 11). Paratypes (IAECAS): CHINA: 1 male, Jiangxi, Yichun City, Yifeng County, Guanshan Natural Reserve, 28°33.022’N 114°33.689’E, 376 m, 27. IX. 2009, leg. Bian & Tong (loc. 5); 4 males, 4 females, Jiangxi, Ganzhou City, Shangyou County, Wuzhifeng Town, 25°57.420’N 114°04.646’E, ca. 554 m, 5. X. 2009, leg. Bian & Tong (loc. 12); 7 females, Jiangxi, Ganzhou City, Shangyou County, Wuzhifeng Town, downstream of loc. 13, 7. X. 2009, leg. Bian & Tong (loc. 14); 1 female, Jiangxi, Ganzhou City, Shangyou County, ca. 1 km Northeast of Wuzhifeng Town, 7. X. 2009, leg. Bian & Tong (loc. 15); 1 male Jiangxi, Ganzhou City, Longnan County, Jiulianshan Natural Reserve, 24°37.207’N 114°32.114’E, 562 m, 9. X. 2009, leg. Bian & Tong (loc. 16); 1 male, Jiangxi, Ganzhou City, Longnan County, Jiulianshan Natural Reserve, downstream of loc. 16, 10. X. 2009, leg. Bian & Tong (loc. 17).

Diagnosis. This species is similar to Cuspidevia velaris from which it differs as follows: 1. elytra with five striae well visible; 2. first ventrite with a pair of carinae; 3. aedeagus with the ventral sac lacking apical teeth.

Description. Body (Fig. 1) length 2.3–2.5 mm (pronotum and elytra), width 1.0– 1.1 mm. Colour black; antennae, mouth parts, and anterior margin of labrum and pronotum yellowish brown; legs ferrugineoustestaceous; ventral surface testaceous to dark brown.

Head mostly retractable, labrum and frons densely covered with white pubescence.

Pronotum sparsely punctuate, punctures small; posterior angles acuminate, but not produced; anterior angles distinctly produced anteriad forming long acuminate spines; sub-lateral grooves indistinct, and in some specimens only with a basal trace; median groove shallower than Cuspidevia jaechi sp. nov.; with a pair of small granules in front of angles of scutellum.

Scutellum triangular, without punctures. Elytra elongate, widest near basal third; five elytral striae well visible, first one from elytral 0.2 to 0.8, gradually shorter from the first one to the fifth; intervals 1–6 flat and glabrous; seventh interval with a distinct granulated carina; elytral apices densely granulate, indistinctly produced, separately acuminate (elytral apices with medioapical teeth in some specimens).

Ventral view (Fig. 2). Middle of mesoventrite with a “V” shaped groove; metaventrite with two rows of punctures, one along hind margin of mesocoxae and the other one along anterior margin of metacoxae.

Legs with distal third of hind femora with golden setae on inner surface; tibiae with cleaning fringes; claw without basal teeth.

First ventrite with a pair of ad-median carinae (Fig. 2); the last ventrite long, but not distinctly produced laterally.

Aedeagus (figs. 7–8, 11–13), long and slender; penis about twice as long as phallobasis, and apical part of the penis strongly narrowed; ejaculatory duct with distinct sclerotizations; ventral sac without apical teeth; parameres fused to the penis.

Females: Outer teeth of elytral apices less produced than males (red arrow in Fig.3).

Distribution. CHINA: Jiangxi Province.

Habitat. Small stream, with stones, gravel, sand and decaying leaves.

Etymology. From latin word “ brevis ” = short, in reference to the short elytral apices.