Nymph identification: Nymphs, 0.8 to 10 mm, will have long fine hairs at the anterior and posterior ends on both sides of the pronotum which is in contrast to S. torrentium which has hairs along the entire lateral margin on both sides. Additionally, it has a Y like structure between its eyes whereas S. torrentium has a V like structure.
Only found in stony rivers and stream.
It is semivoltine, taking more than one year to complete its life cycle. Nymphs are present all year, and adults fly from May to July.
Common with a relatively wide distribution range in Ireland, with the majority of records in the southern half of the island. Has been recorded from 106 10km squares in Ireland.
Records submitted to Data Centre in 2019
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H.B. Feeley, J-R. Baars & M. Kelly-Quinn (2016) The Stonefly (Plecoptera) of Ireland –
Distribution, Life Histories & Ecology. National Biodiversity Data Centre, Waterford. Ireland.