摘要
天牛科短柄天牛族Petrognathini的浑天牛属Ioesse中国尚无记载,全世界仅记录血红浑天牛Ioesse sanguilenta Thomson 1个种,Thomson(1864)的原描述为雌虫,Gahan(1894)描述了雄虫,已知的分布纪录为马来西亚、缅甸、越南和老挝。本文记述的是在西藏墨脱县采到的1个新种。
Ioesse medogensis Chiang et Chen, sp. nov. (Fig. 1)Male: Body pitchy black, clothed with minute yellowish gray pubescence; clypeus reddish brwon, glabrous; antennae black on first three pints, yellow on remaining pints, darkened anteriorly and posteriorly on 4th to 10th pints; frons convex; antennal tubercles elevated; vertex depressed; inferior lobes of eyes prominent, more than twice as high as genae below and as broad as frons; antennae thick, one half again longer than the body, scape stout, cicatrix abscent, 3rd pint twice longer than the scape, 3rd to 4th pints sparsely and finely fringed beneath. Prothorax transverse; scutellum spoon-shaped, rounded apically. Elytra slightly broader than prothorax, parallel, narrowly rounded and subtruncate apically, with one to two coarse granules on each humeral angle. Mesosternal intercoxal process evenly inclined, non-tuberculate. Middle tibia grooved externally, claws divaricate, slender.Body length: 30mm; breadth: 11mm.Holotype: (?) Medog county, Xizang Autonomous Region, Ⅷ-1984, He Tan coll. The type specimen is deposited in the Laboratory of Insect Systematics and Physiology, Southwest Agricultural University.This new species differs from the only recorded species Ioesse sanguilenta Thomson in the genus in the body pitchy black instead of reddish brown; antennae one and half again longer than the body in male instead of about reaching the tip of abdomen; antennal segments largely yellow beyond 3rd, only blackened basally and apically, and with 11th pint entirely yellow instead of the antennae uniformly black, only reddish brown on scape; antennae only fringed beneath 3rd to 4th joints instead of being fringed beneath 3rd to 6th or 7th joints.
关键词
天牛科
浑天牛属
分类
新种
Cerambycidae, Taxonomy, Ioesse, new species.
