[Scientific Papers] http://www.scipapers.com    2007-11-16  

 A new soldier-producing aphid species, Pseudoregma baenzigeri, sp. nov., from northern Thailand

Shigeyuki Aoki^1,a, Utako Kurosu² and Warunee Sirikajornjaru³

¹ Faculty of Economics, Rissho University, Osaki 4-2-16, Tokyo, 141-8602 Japan
² Faculty of Economics, Chuo University, 742-1 Higashinakano, Hachioji, Tokyo 192-0393, Japan
³ Department of Plant Protection, Faculty of Agricultural Production, Maejo University, Chiang Mai 50290, Thailand


Abstract

Pseudoregma baenzigeri, sp. nov., is described from northern Thailand. This species forms dense, huge colonies on shoots of the bamboo Dendrocalamus sp., and produces many first-instar, pseudoscorpion-like soldiers. Alate sexuparae were found from the end of September to mid October. Two syrphids, Eupeodes sp. A (allied to E. confrater) and Dideoides chrysotoxoides, and the pyralid Dipha aphidivora were recorded as predators of P. baenzigeri. The aphids were also likely to be eaten by some rodents. The apterous adult, nymphs, soldier and alate sexupara of P. baenzigeri can be distinguished from those of the other congeners by the longer, conical ultimate rostral segment. A tentative key to the species of Pseudoregma living on bamboo is provided.

Keywords: Aphididae, bamboo, bionomics, Cerataphidini, Hormaphidinae, Dendrocalamus


Correspondence: ^a oregma@rb3.so-net.ne.jp

Received: 10 September 2006 | Accepted: 13 December 2006 | Published: 11 June 2007


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