FNZ 6 - Hydraenidae (Insecta: Coleoptera) - Abstract
Ordish, RG 1984. Hydraenidae (Insecta: Coleoptera). Fauna of New Zealand 6, 64 pages.
( ISSN 0111-5383 (print), ; no. 06. ISBN 0-477-06747-6 (print) ). Published 12 Nov 1984
Thirty-two species of Hydraenidae in five genera are recognised in the New Zealand subregion. Of these, 27 are described as new species and a further two are redescribed to facilitate comparison. Two of the genera, Homalaena and Podaena, are described as new, and together with Orchymontia Broun are regarded as comprising the primitive aquatic elements of the family which have speciated in the abundant alpine streams. The single species of Hydraena is regarded as being much more recent, as is the only terrestrial genus, Meropathus. Keys to genera and species are given, together with habitus drawings representative of each genus and line drawings of genitalia and other diagnostic features. Brief observations are made on morphology, biology, and phylogeny.