Claim: There are six genera of the Family Gerridae based on their habitats, but none were ever found in New Zealand, even though some are present in Australia.
Evidence: Halobates group 1 Halobates group 2 Stenobates Rheumatometroides Rheumatobates Prominent genera Gerridae are present in Europe, the former USSR, Canada, US, South Africa, South America, Australia, China and Malaysia . None have been yet identified in New Zealand waters. Asclepios