Landcare Research - Manaaki Whenua

Landcare-Research -Manaaki Whenua

Guide to New Zealand's freshwater invertebrates

Double gill mayfly ( Leptophlebiidae : Atalophlebioides )

Diagnostic features

Atalophlebioides mayfly nymphs have a flattened body form, double gills and a wide labrum (top “lip”).

Typical habitats

Atalophlebioides larvae are uncommon in most regions but they tend to occur in stony, slow-flowing streams in or near areas of native bush.


Leptophlebiid mayflies feed by scraping diatom algae and other organic matter from stone surfaces.

Indicator value

Atalophlebioides are not often found in high abundance, but they are probably indicative of moderate to good water quality. They have tolerance values of 9 (hard bottom sites) and 4.4 (soft bottom sites).