Calloserica cambeforti, Ahrens, 2000

Ahrens, Dirk, 2000, New species of Calloserica Brenske, 1894 from Sikkim and Nepal (Coleoptera, Melolonthidae, Sericini), Zoosystema 22 (4), pp. 815-824 : 820-821

Calloserica cambeforti n. sp.

( Fig. 4 )

TYPE MATERIAL. — Holotype:, Sikkim de Padamtsin [Padamchen] à Lingtou Juillet 1901 / Muséum Paris ex. Coll. R. Oberthur ( MNHN).

ETYMOLOGY. — The species is dedicated to Prof. Y. Cambefort (MNHN), who greatly supported my work during my visits at MNHN.

DESCRIPTION

Length: 9.3 mm, width: 4.6 mm, length of elytra: 7.3 mm.

Body slender and oblong, chestnut with opaque toment, elytral striae lighter, labroclypeus shiny, dorsal surface erectly hairy.

Labroclypeus shiny, transverse, sides convexly narrowed anteriorly, all borders strongly reflexed and anteriorly deeply sinuate at middle, front angles abruptly rounded; labrum broadly trapezoidal and anteriorly produced, longest extension medially; clypeal surface densely punctate, punctures slightly elevated, with fine setae. Frontoclypeal suture finely incised and feebly elevated, weakly curved; smooth area in front of eye 1.5 time as wide as long, ocular canthus long and slender, with few setae. Punctures on frons vanishing under thick opaque tomentum, only recognizable by their long erect setae. Antenna yellow, 10-segmented; club 4-segmented, apically feebly curved outward, almost twice as long as remaining segments together, seventh segment only a trifle shorter than club. Eyes large, ratio diameter/interocular width: 0.7.

Pronotum narrow, widest at base, lateral margin straightly convergent from base to middle, anteriorly strongly curved, front angles bluntly round- ed, not protudent, posterior angles largely rounded; disc with very fine and shallow punctation, double erect pilosity directed forward, mixed short and two times longer setae. Proepisternum weakly grooved, posterior border produce a broadly rounded angle with pronotal base. Scutellum oblong, triangular, densely punctate, basally with a deep transverse impression.

Elytra oblong, intervals flat, mixed coarse punctures bearing long, erect, forward directed setae with groups of fine punctures bearing short white scales; apex membranous.

Ventral surface including metacoxal plates, femora, and abdominal sternites clothed with fine, recumbent, yellow setae. Abdominal sternites without any elevations. Mesosternum between mesocoxae equal in width to slender mesofemur. Ratio of length metepisternum/metacoxa: 1/1.23. Pygidium moderately convex, densely and shallowly punctate, with double pilosity, long setae four times longer than the short ones.

Metatibia slender, ratio width/length: 1/4.4; dorsally longitudinally carinate, with two groups of spines, the proximal one situated at middle of metatibial length, basally few small setae on a longitudinal elevation; outside longitudinally grooved, only with few very small punctures, ventral edge with four tubercles bearing a strong seta. Metatarsal segments laterally carinate, first metatarsomere almost as long as following two segments combined, almost twice as long as superior metatibial spur; mesotarsal segments laterally not carinate, dorsally without longitudinal impressions. Anterior tibia moderately long, bidentate.

REMARKS

This species is externally similar to C. begnasia Ahrens, 1999 . It differs by ratio of length of the first metatarsomere with the combined lengths of the second and third metatarsomeres as well as by genitalic features of the male ( Fig. 4 ). In C. cambeforti n. sp. the lateral apophysis of aedeagal phallobasis is ventrally largely produced and curved, apically not produced, the parameres are shorter than those of C. trigrina Brenske.

Female unknown.

Figures

FIG. 4. — Calloserica cambeforti n. sp. (holotype), male genitalia; A, C, aedeagus, lateral view; B, parameres, dorsal view. Scale bar: 1 mm.