Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

Guide to New Zealand's freshwater invertebrates

Diving beetle ( Dytiscidae : Hyphydrus )

Diagnostic features

Hyphydrus is one of the dytiscid “diving beetles” having larvae and adults that are active swimmers. The larvae have a spoon-like “nose” that has no side barbs (unlike Antiporus). The adults are oval and streamlined, up to 5mm long, with 11-segmented antennae, and the last segment of the foreleg is shorter than the other tarsal segments.

Typical habitats

Hyphydrus are most common in ponds, wetlands and slow-flowing weedy streams


The dytiscid beetles are predators, feeding on other pond invertebrates.

Indicator value

The presence of Hyphydrus is more likely to reflect pond-like habitat conditions rather than any particular water quality conditions. This genus has not been assigned tolerance values but the dytiscids have family scores of 5 (hard bottom sites) and 0.4 (soft bottom sites).