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Introduction

The helicophids are a small family of caddisflies found in Australia, New Zealand, and now New Caledonia as well as austral South America (southern Chile and adjacent Argentina), one of several caddisfly families showing this trans-Antarctic biogeographical distribution pattern. The family was created by Mosely (in Mosely and Kimmins 1953) to accommodate a new genus and 2 new species, Helicopha astia Mosely and H. hortena Mosely, both from New South Wales. Additional genera have been transferred to the family from Beraeidae, Calocidae, and Sericostomatidae and described within the family itself, the most recent of these being Briama Johanson and Ward from New Caledonia and Heloccabus Neboiss from eastern Australia, the later placed provisionally in the family (Johanson & Ward 2001, Neboiss 2002). In addition, the endemic New Zealand genus Alloecentrella was just transferred to the family from Calocidae by Henderson & Ward (2007). Thus, the current accounting of the 11 genera in the family, for a total of about 35 species, is as follows: Alloecella Banks (Australia), Alloecentrella Wise (New Zealand), Alloecentrellodes Flint (Chile), Austrocentrus Schmid (Argentina, Chile), Briama Johanson and Ward (New Caledonia), Eosericostoma Schmid (Argentina, Chile), Helicopha Mosely (Australia, New Caledonia), Heloccabus Neboiss (Australia), Microthremma Schmid (Chile), Pseudosericostoma Schmid (Chile), and Zelolessica McFarlane (New Zealand). From Holzenthal et al. (2007a).

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