Smaragdina magnipunctata Duan, Wang & Zhou, 2022

Duan, Wen-Yuan, Wang, Feng-Yan & Zhou, Hong-Zhang, 2022, Two new species of the genus Smaragdina Chevrolat, 1836 (Coleoptera, Chrysomelidae, Cryptocephalinae) from China, ZooKeys 1082, pp. 1-26 : 1

Smaragdina magnipunctata Duan, Wang & Zhou sp. nov.

Figures 3 , 4

Diagnosis.

This new species is well distinguished from all its congeners by the presence of unique black markings on the elytra and strong punctures arranged in regular rows with their interspaces impunctate.

Etymology.

The specific epithet is from the Latin words " magni -" and " punctata " in reference to the big punctures of the elytra.

Type locality.

China: Yunnan Province: Xishuangbanna, Xiaomengyang.

Material examined

(n = 4). Holotype: male, China: Yunnan Province: Xishuangbanna, Xiaomengyang , 7.VII.1957, coll. Shuyong Wang (IZ-CAS) . Paratypes: China: Yunnan Province: 1 female, Xishuangbanna, Xiaomengyang , 10.X.1957, coll. Shuyong Wang (IZ-CAS) ; 1 female, Xishuangbanna, Xiaomengyang, 21.X.1957, coll. Shuyong Wang (IZ-CAS); 1 female, Xishuangbanna, Xiaomengyang, 22.X.1957, coll. Lingchao Zang (IZ-CAS).

Measurements

(n = 4). Body length males: 3.7 mm, females: 3.9-4.3 mm.

Description.

Body (Figs 3A, B , 4A ) oblong, largely khaki. Head yellowish brown, Mandibles with black apex; two basal antennomeres yellow, others brown; sometimes vertex black. Pronotum yellowish brown. Scutellum black. Elytra khaki, margins black, disc with two black round markings. Ventral side of body largely yellowish brown, ventral side of mesothorax and metathorax black; legs yellowish, tibiae outer side and tarsi somewhat brown.

Head small, glabrous. Mandibles short; labrum slightly incised at anterior margin; length ratio of maxillary palpomeres 0.5:2.2:2.0:2.5; length ratio of labial palpomeres 0.4:1.8:3.0. Clypeus glabrous, anterior margin slightly incised; frons with 3 grooves arranged in triangular pattern; inner sides of eyes with short pubescence; vertex slightly convex, glabrous. Antennae short, extending to base of prothorax, pubescent, 1st antennomere oblong and thick, 2nd rounded, 3rd slender, similar in length with 2nd, 4th triangular, a little longer than 3rd, serrated from 5th segment onwards, while last segment ovate, apex sharp.

Pronotum transverse, about 2 × as wide as long, strongly convex; anterior and lateral margins rounded, posterior margin weakly sinuated and bordered; surface without any punctures. Scutellum triangular, impunctate, apex slightly elevated over elytral surface.

Elytra glabrous, 1.5 × as long as wide at humeri; 2/3 basal part with coarse, sparse punctures, forming regular rows, with interspaces impunctate; 1/3 apical part with sparse, fine punctures, almost obsolete.

Underside and legs thickly clothed with silvery pubescence; apex of pygidium slightly concave. Tarsi slender, length ratio of protarsomeres 1.0:0.7:0.2:1.2.

Aedeagus (Figs 3D-G , 4B-D ) oblong, about 3.6 × as long as wide, apex triangular, bent ventrally; without pubescence.

Female. Punctures of elytra more obvious than male, last segment of abdomen with a fossa, apex of pygidium truncate. Spermatheca (Figs 3C , 4E ) hooked, slender; duct strongly sclerotized, base thickened, coiled up about 20-30 ×. Rectal sclerites strongly sclerotized, ventral rectal sclerites (Fig. 3H ) large, dumbbell-like; dorsal central sclerite (Fig. 3I ) rectangular; lateral sclerites slightly small.

Distribution.

China (Yunnan).

Figures

Figure 3. Smaragdina magnipunctata Duan, Wang & Zhou, sp. nov. A habitus B lateral view of habitus C spermatheca D lateral view of aedeagus E ventral view of aedeagus F dorsal view of aedeagus G apex of aedeagus H ventral rectal sclerites I dorsal rectal sclerites. Scale bars: 0.5 mm (A, B), 0.2 mm (C-I).

Figure 4. Smaragdina magnipunctata Duan, Wang & Zhou, sp. nov. A habitus B dorsal view of aedeagus C lateral view of aedeagus D ventral view of aedeagus E spermatheca. Scale bars: 0.5 mm.