Fringe gilled mayfly (Isothraulus)
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Mayflies
- Burrowing mayfly (Ichthybotus)
- Double gill mayfly (Arachnocolus)
- Double gill mayfly (Atalophlebioides)
- Double gill mayfly (Aupouriella)
- Double gill mayfly (Austroclima)
- Double gill mayfly (Austronella)
- Double gill mayfly (Mauiulus)
- Double gill mayfly (Neozephlebia)
- Double gill mayfly (Tepakia)
- Double gill mayfly (Zephlebia)
- Fringe gilled mayfly (Isothraulus)
- Orange mayfly (Acanthophlebia)
- Single gill mayfly (Deleatidium)
- Spiny gilled mayfly (Coloburiscus)
- Swimming mayfly (Ameletopsis)
- Swimming mayfly (Nesameletus)
- Swimming mayfly (Oniscigaster)
- Swimming mayfly (Rallidens)
- Swimming mayfly (Siphlaenigma)
Typical habitats
Isothraulus larvae are rarely found in high abundance, but they are most common in small, slow-flowing bush covered streams in the north of the North Island.
Feeding
Leptophlebiid mayflies feed by scraping diatom algae and other organic matter from stone surfaces.
Indicator value
- Hard bottom: 8
- Soft bottom: 7.1
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 Isothraulus suggests good habitat and water quality conditions, especially if other mayfly or stonefly groups are abundant. They have tolerance values of 8 (hard bottom sites) and 7.1 (soft bottom sites).