New Zealand Journal of Zoology abstracts

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The larva of Hydrobiosis torrentis Ward (Trichoptera: Hydrobiosidae)

BRIAN J. SMITH

National Institute of Water and Atmospheric
 Research Ltd
P.O. Box 11-115
Hamilton, New Zealand

Abstract  The Hydrobiosis charadraea Group (Trichoptera: Hydrobiosidae) contains three described species of caddisflies; Hydrobiosis torrentis Ward, H. charadraea McFarlane and H. harpidiosa McFarlane. However, the larvae of only the latter two have been described. The larva of H. torrentis is distinguished from other species in the H. charadraea Group by the absence of darker pigmentation on the head capsule and anterior margin of the prosternal sclerite, and by the presence of an elongated femoral process on the chelate forelimb. The larvae of H. torrentis are restricted to cold waters in alpine regions of the South Island, New Zealand. This paper describes and figures the last instar larva of H. torrentis, includes a distribution map for this species, and provides a key to the last instar larvae of the H. charadraea Group.

Keywords  Trichoptera; Hydrobiosidae; Hydrobiosis charadraea Group; Hydrobiosis torrentis; New Zealand; biosystematics; taxonomy

Z98025
Received 30 June 1998; accepted 16 August 1999

PDF file of entire paper: medium quality (368K); (scanned from paper original: notes about this process)

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