Aetheomorpha obtusapicata, Wang & Zhou, 2012

Wang, Feng-Yan & Zhou, Hong-Zhang, 2012, Taxonomy of the genus Aetheomorpha Lacordaire (Coleoptera: Chrysomelidae: Cryptocephalinae: Clytrini) from China, with description of five new species, Journal of Natural History 46 (23 - 24), pp. 1407-1440 : 1415-1418

Aetheomorpha obtusapicata sp. nov.

( Figures 3A–G , 12C )

Type material

Holotype. CHINA: Yunnan: male, Xishuangbanna , Meng’a , 1050–1080 m, 22 July 1958, leg. Shuyong Wang ( IZ-CAS).

Paratypes. CHINA: Yunnan: two females, same data as holotype; one female, Xishuangbanna, Meng’a , 1050–1080 m, 22 August 1958, leg. Leyi Zheng; one female, Xishuangbanna, Meng’a , 1050–1080 m, 22 August 1958, leg. Fuji Pu; one female, Xishuangbanna, Meng’a , 1050–1080 m, 17 August 1958, leg. Shuyong Wang; one female, Xishuangbanna, Xiaomengyang , 850 m, 28 September 1957, leg. Shuyong Wang; one female, Xishuangbanna, Kongmingshan , 1900 m, 21 September 1957, leg. Shuyong Wang ( IZ-CAS); one female, Mengla, Mohan , 2–4 August 2007, legg. Guodong Ren , Wenjun Hou, Yalin Li ( HBUM) .

Description

Body oval. Head black, clypeus, labrum and mandibles brown, other mouth parts and basal three antennomeres fulvous, fourth to eleventh antennomeres brown. Pronotum fulvous with two black subtriangular spots in middle, sometimes also with an indistinct small spot at each side of the pronotum, four spots placed in a row. Elytra fulvous, each elytron with three bands: one transverse band placed at basal part, which with sinuate posterior margin; second situated at two-thirds, transverse and short, from suture to the middle of elytra; third from middle to apex laterally, isolated from the second one. Scutellum black with brown apex, basal part generally brownish. Underside of prothorax fulvous, underside of mesothorax and metathorax black, abdomen more or less blackish, rarely fulvous; legs brown, posterior half of the tibiae and tarsi blackish brown.

Head very small, vertex feebly convex, impunctate and glabrous. Eyes moderate. Frons broad, 1.4 times as wide as the diameter of the eye (about half of maximal width of the head), coarsely punctured, sparsely covered with long pubescence, especially near inner margins of eyes; clypeus feebly incised at anterior margin, sides with long pubescence. Labrum with short pubescence, anterior margin nearly straight; mandibles short. Antennae short, not reaching to base of pronotum; pubescent except third antennomere; first antennomere elongate, second rounded, third small, fourth triangular, last one subovate, others transversely triangular; length ratio of antennomeres 0.8: 0.4: 0.3: 0.7: 0.8: 0.9: 1.0: 0.9: 1.0: 1.0: 1.8.

Pronotum transverse, 1.9 times as wide as long, widest at base; convex; very narrowly bordered; anterior angles rectangular, posterior ones rounded; anterior margin nearly straight, sides slightly arcuate, posterior margin feebly lobed in the middle; surface impunctate and shiny. Scutellum nearly trapezoidal, impunctate.

Elytra widest at middle, slightly narrowed anteriorly and posteriorly, about 1.2 times as long as wide at humeri, 1.1 times as long as wide at median part; feebly lobed below shoulders; surface glabrous and shiny, anterior part densely punctured, interstices 1.5 to 2.5 times the diameter of a puncture, punctures gradually diminishing, disappearing at two-thirds of elytra. Epipleura narrow, about one-third of elytral length. Pygidium exposed, apex rounded.

Underside of body and legs covered with short silvery pubescence; all legs slender, tarsi narrow, length ratio of protarsomeres 1.4: 1.1: 0.3: 2.2.

Aedeagus fulvous, apex broad, feebly bent ventrally, underside covered with sparse pubescence at anterior part laterally, surface behind the pubescent area sparsely punctured.

Female. Body more robust; frons broader, 1.7 times as wide as the diameter of the eye (about 0.55 times of maximal width of the head); pygidium more exposed, apex deeply incised; spermatheca not inflated, spermathecal duct short, helically coiled about 20 times; ventral rectal sclerites long and narrow, dorsal central sclerite oblong, with a small process backwards; lateral sclerites moderate, with obtuse corners forwards.

Measurement

Male: 3.9 mm, females: 4.1–4.7 mm.

Etymology

The specific epithet is a combination of Latin words obtus- and apicata, and refers to the obtuse apex of aedeagus.

Distribution

China (Yunnan).

Remarks

Aetheomorpha obtusapicata sp. nov. is close to A. pictipennis Jacoby, 1892 in elytral pattern, but the pronotum of the new species has two black subtriangular spots and sometimes also has another two indistinct small spots; the aedeagal apex is broad and obtuse, with distinct punctures near the lateral margins, which is very different from other congeneric species. Moreover, the dorsal central rectal sclerite is oblong.

Figures

Figure 3. Aetheomorpha obtusapicata sp. nov.: (A) habitus; (B) male genitalia in dorsal view; (C) male genitalia in lateral view; (D) male genitalia in ventral view; (E) spermatheca; (F) rectal sclerites in ventral view; (G) rectal sclerites in dorsal view. Scales 0.5 mm.

Figure 12. Habitus of Aetheomorpha: (A) Aetheomorpha bidentata sp. nov.; (B) Aetheomorpha bilobata sp. nov.; (C) Aetheomorpha obtusapicata sp. nov.; (D) Aetheomorpha punctistriata sp. nov.; (E) Aetheomorpha wangi sp. nov.; (F) Aetheomorpha furcata Medvedev and Kantner; (G) Aetheomorpha bacboensis Medvedev; (H) Aetheomorpha coerulea (Jacoby); (I) Aetheomorpha decemnotata (Jacoby).