In this section
- Alligator weed flea beetle (Agasciles)
- Diving beetle (Antiporus)
- Diving beetle (Hyphydrus)
- Diving beetle (Lancetes)
- Diving beetle (Liodessus)
- Diving beetle (Onychohydrus)
- Diving beetle (Rhantus)
- Moss beetles (Hydraenidae)
- Riffle beetles (Elmidae)
- Rove beetles (Staphylinidae)
- Water scavenger beetle (Berosus)
- Water scavenger beetle (Hydrophilidae)
- Water scavenger beetle (Laccobius)
- Water scavenger beetle (Limnoxenus)
- Whirlygig beetle (Gyrinus)
Lancetes is one of the dytiscid “diving beetles” having larvae (which we haven’t managed to photograph yet) resembling those of Rhantus, lacking any nose-like projection. The larvae have 2 tail-like cerci that are twice the length of the last abdominal segment (Rhantus cerci are about as long as the last segment). The adults are oval and streamlined, 8 to 12mm long, with 11-segmented antennae, and are distinguished by strong yellow and black stripes.
Lancetes are most likely to be found in weedy ponds, and slow-flowing streams.
The dytiscid beetles are predators, feeding on other pond invertebrates.
- Hard bottom: unassigned; general dytiscids value 5
- Soft bottom: unassigned; general dytiscids 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 Lancetes 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).