In this section
- Alligator weed flea beetle (Agasciles)
- Diving beetle (Antiporus)
Diving beetle (Hyphydrus)
- Diving beetle (Liodessus)
- Diving beetle (Onychohydrus)
- Diving beetle (Rhantus)
- Marsh beetles (Scirtidae)
- Riffle beetles (Elmidae)
- Toe-winged beetles (Ptilodactylidae)
- Water scavenger beetle (Berosus)
- Water scavenger beetle (Hydrophilidae)
- Whirlygig beetle (Gyrinus)
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.
Hyphydrus are most common in ponds, wetlands and slow-flowing weedy streams
The dytiscid beetles are predators, feeding on other pond invertebrates.
- Hard bottom: unassigned; general dytiscid value 5
- Soft bottom: unassigned; general dytiscid value 0.4
The tolerance values (ranging from 0 to 10) give an indication of which are the sensitive taxa (values of 8 or more) and which are the tolerant taxa (values of 3 or less). For more information see: Indicator species
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).