Coptodryas carinata, Smith & Beaver & Cognato, 2020

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Coptodryas carinata sp. nov. Fig. 35E, F, K

Type material.

Holotype, female, 雲南:勐养 1000公尺 印度栲 051 1962-V-10 采集者:宋士美 [China: Yunnan, Mengyang, 1000 m, 10.v.1962, Shimei Song, ex Castanopsis indica ] (NMNH).

Diagnosis.

2.7 mm long (n = 1); 2.7 × as long as wide. This species is distinguished by the dense tuft of setae along the elytral base extending to interstriae 8; body glabrous except for pronotal and elytral bases; striae and interstriae uniseriate punctate; elytral disc strongly shiny, declivity shagreened; basal 1/2 of declivity strongly sulcate, sulcate area v-shaped, margined by costate interstriae 3, 5, 6, and sharply carinate interstriae 4; apical 1/2 of declivity subconvex, interstriae costate, denticulate to apex; declivital posterolateral margin carinate to interstriae 7; protibiae obliquely triangular; pronotum rounded, robust (type 5) when viewed laterally, and basic (type 2) when viewed dorsally.

Similar species.

Coptodryas amydra , C. concinna , C. elegans , C. nudipennis .

Description

(female). 2.7 mm long (n = 1); 2.7 × as long as wide. Body, antenna, and legs dark brown. Body glabrous except for pronotal and elytral bases. Head: epistoma entire, transverse, with a row of hair-like setae. Frons weakly convex to upper level of eyes, strongly shagreened, alutaceous, punctate, punctures fine, dense, setose, setae long, erect, hair-like. Eyes deeply emarginate just above antennal insertion, upper part smaller than lower part. Submentum narrowly triangular, slightly impressed. Antennal scape regularly thick. Pedicel as wide as scape. Pronotum: 0.69 × as long as wide. In dorsal view basic and parallel-sided, type 2, sides parallel in basal 2/3, rounded anteriorly; anterior margin with a row of five serrations. In lateral view rounded and robust, type 5, disc flat, summit at apical 2/5. Anterior slope with densely spaced, broad asperities, becoming lower and more strongly transverse towards summit. Disc shagreened, weakly rugose, impunctate glabrous. Some longer hair-like setae at anterior and lateral margins and a dense narrow median tuft along base laterally extending to striae 3. Lateral margins obliquely costate. Base weakly bisinuate, posterior angles acutely rounded, almost subquadrate. Elytra: 1.53 × as long as wide, 2.22 × as long as pronotum. Scutellum minute, convex, slightly raised above elytral surface. Elytral mycangium setal tuft along elytral base dense, extending to interstriae 8. Elytral base bisinuate, edge oblique, humeral angles rounded, parallel-sided in basal 2/3, then rounded to apex. Disc flat, strongly shiny, striae weakly impressed, with large deep punctures separated by less than 1-2 diameters of a puncture, glabrous; interstriae flat, minutely uniseriate punctate, punctures sparse, spaced 2-4 diameters of a puncture, glabrous. Declivity occupying approximately 2/3 of elytral length, glabrous, basal 1/2 of strongly sulcate, sulcate area v-shaped, margined by costate interstriae 3, 5, 6, and sharply carinate interstriae 4, apical 1/2 of declivity subconvex, strongly shagreened; interstriae costate and denticulate to apex; striae punctate, punctures much larger and deeper than those of disc; interstriae impunctate and densely and uniseriate granulate from base to apex. Posterolateral margin carinate to interstriae 7. Legs: procoxae contiguous; prosternal coxal piece bulging. Protibiae obliquely triangular, broadest at apical 1/3; posterior face smooth; apical 1/2 of outer margin with six large socketed denticles, their length as longer than basal width. Mesotibiae flattened, outer margins evenly rounded with nine large socketed denticles.

Etymology.

L. carinatus = keeled. In reference to the profoundly large carinae on the declivity. An adjective.

Distribution.

China (Yunnan).

Host plants.

This species is known from Castanopsis indica ( Fagaceae ).

Remarks.

The holotype is missing the antennal funicles and club and metatibiae. Locality labels on the holotype are in Chinese and were translated by You Li. An English locality label has been placed on the specimen below the original locality labels.

Figures

Figure 35. Dorsal, lateral and declivital view of Coptodryas amydra holotype, 1.9 mm (A, B, I), C. bella, 3.75 - 4.0 mm (C, D, J), C. carinata holotype, 2.7 mm (E, F, K), and C. concinna, 2.3 mm (G, H, L).