Cryptocephalus (s. str.) zhangi Duan, Wang & Zhou, 2025

Duan, Wen-Yuan, Wang, Feng-Yan & Zhou, Hong-Zhang, 2025, Four new species and three new country records for the Cryptocephalus trifasciatus group (Coleoptera: Chrysomelidae: Cryptocephalinae) from China, Zootaxa 5653 (4), pp. 535-552 : 544-546

4. Cryptocephalus (s. str.) zhangi Duan, Wang & Zhou sp. nov.

(Figs 4-1; 4-2)

Type locality. China: Yunnan Province: Dali, Diancangshan .

Type material examined. Holotype: male, CHINA: Yunnan Province: Dali, Diancangshan , 30. VI. 1981, coll. Xuezhong Zhang ( IZ-CAS) . Paratype: Yunnan Province: 1 female, Milewushan, 20. V. 1979, coll. Guangqiang Yin ( IZ-CAS) .

Measurements. BL = 4.17 mm, BW = 2.30 mm, HL = 1.32 mm, HW = 1.28 mm, PL = 1.23 mm, PW = 2.13 mm, EL = 2.93 mm, AL = 1.54 mm, AW = 0.40 mm, SL = 0.64 mm.

Description. Body (Figs. 4-1A–B) slender, subcylindrical. Head reddish brown; vertex black; antennal insertions surrounding by two black round markings; labrum yellowish brown; mandibles black; antennae yellowish brown on first four segments, black on terminal seven. Pronotum yellowish brown, disc with a large black marking, almost black in dorsal view; anterior margin yellowish brown, basal margin black. Scutellum entirely black. Elytron yellowish brown, humerus with black oblong marking, 2/5 apical region with large black marking, sutural and apical margins black. Ventral surface of body largely black, prosternum, mesosternum and mesosternal epimeron pale yellowish brown; abdomen black, lateral sides yellowish brown; legs darkish brown.

Head more than one-half as broad as prothorax, nearly round in frontal outline, vertex and frons with sparse and coarse punctures and pubescence. Eyes emarginated below middle, superior eye-lobes separated and narrower than antennal insertions. Clypeus uneven and pubescent, apical region wrinkled, anterior margin weakly concave. Antennae of males long, reaching apical region of elytra; 1 st segment long and thick, clubbed, 2 nd subspherical, 2/5 as long as 1 st, 3 rd –4 th slender and short, 4 th slightly longer than 3 rd, shorter than 5 th, from 5 th segment on somewhat broadened and flatted, each segment about equal in length.

Pronotum (Figs. 4-1A–B) convex, smooth and shining, nearly 0.64 time as long as broad, oval in dorsal view; anterior margin slightly arcuate in anterodorsal view; basal margin weakly sinuate and serrate, obtuse and truncate in middle; disc evenly convex, smooth, without any punctures. Scutellum triangular, length about equal with broad, basal margin slightly sharp, sloping upward apically, smooth and impunctate.

Elytron (Figs. 4-1A–B) about 2.4 times as long as broad, humeri slightly prominent, roundly truncate apically. Disc of each with eleven somewhat oblique rows of fairly deep punctures; interspaces with minute punctures.

Ventral surfaces of body with rather densely fine punctures. Prosternum rectangular, surface uneven, slightly longer than broad, middle part of anterior margin protruded triangularly, posterior margin with a pair of weakly horned protrusions. Mesosternum broad and small, longer than broad, disc slightly concave. Pygidium with coarse and dense punctures, middle part with roundly arcuate posterior margin in male. Claws with teeth.

Aedeagus (Figs. 4-1D–F; 4-2A–C) elongate, clubbed, about 3.7 times as long as wide. Apex of median lobe triangular, slightly narrower than middle, pointed at apex, weakly curved in lateral view; with long and dense pubescence on each side of apex, without any punctures. Median orifice with middle sclerite bending inwards above surface. Inner sac slender and simple. Tegmen Y-shaped, moderately sclerotized.

Female. Body more robust than male; antennae slightly shorter than male, reaching middle region of elytra; posterior margin of pygidium more broadened and rounded. Spermatheca (Figs. 4-1C; 4-2D) hook-shaped, 20°- angled bending near 3/5 from apex, very acute at apex, base slightly broad; duct weakly sclerotized, short and incompact. Rectal sclerites weakly sclerotized, not connected between two rectangular sclerites on ventral side.

Distribution. China (Yunnan).

Diagnosis. This new species is similar to C. (s. str.) flavicinctus Jacoby, 1892 , but can be distinguished by the aedeagus of males with long and dense pubescence.

Etymology. The specific epithet is named in memory of the collector, Mr. Zhang Xuezhong.