Free-living caddis (Edpercivalia)
In this section
-
Uncased caddisflies
- Free-living caddis (Costachorema)
- Free-living caddis (Ecnomina)
- Free-living caddis (Edpercivalia)
- Free-living caddis (Hydrobiosella)
- Free-living caddis (Hydrobiosis)
- Free-living caddis (Hydrochorema)
- Free-living caddis (Neurochorema)
- Free-living caddis (Plectrocnemia)
- Free-living caddis (Polyplectropus)
- Free-living caddis (Psilochorema)
- Free-living caddis (Tiphobiosis)
- Free-living caddis (Zelandoptila)
- Net-building caddis (Aoteapsyche)
- Net-building caddis (Diplectrona)
- Net-building caddis (Orthopsyche)
Taxonomic group
Hydrobiosidae: Edpercivalia
Diagnostic features
The New Zealand hydrobiosid caddis larvae have pincers on their forelegs. Edpercivalia larvae are best recognised by the shape and colouring of the prosternal plate (between the forelegs). This plate is slightly wider than long, and has a strong “bump” in the black pigmentation at the midpoint of the hind edge.
Typical habitats
Edpercivalia larvae are most common in South Island stony streams, particularly in mountainous areas.
Feeding
They are predators, feeding on other stream invertebrates.
Indicator value
- Hard bottom:9
- Soft bottom: 6.3
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
Edpercivalia are most likely to be found in cold water streams with good water quality. They have tolerance values of 9 (hard bottom sites) and 6.3 (soft bottom sites).