Species Biology
Identification
Nymph identification: 1 to 24 mm in size. The perlodid nymphs D. bicaudata and I. grammatica are separated by the lack of thick covering of black clothing hairs on the body of D. bicaudata.
Habitat
Mainly stream and river habitats in high altitude (> 200 m) upland area but is known to occur in both high and low attitude in lakes in the west.
Life cycle
The life cycle can be both univoltine & semivoltine. Nymphs are present all year, and adults are in flight from April to June.
Distribution
World distribution(GBIF)
Irish distribution
Rare and restricted in distribution, especially in the Wicklow Mountains and in the west. Has been recorded from 44 10km squres in Ireland.
Temporal change
Records submitted to Data Centre in 2024
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References
Publications
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.