Arcynopteryx dichroa (McLachlan, 1872)

Arcynopteryx dichroa (McLachlan, 1872) View in CoL

Notes

Arcrynopteryx dichroa is commonly known as the Holarctic Springfly ( Stark et al. 2012). This is a circumpolar, northern Holarctic species that was previously referred to in North America as A. compacta (McLachlan, 1872) ( Kondratieff 2004, Teslenko 2012, Numanović et al. 2024). In North America, the distribution of this species extends from the central Rocky Mountains north to a broad belt from Alaska east to Nunavut, with isolated records from Lake Superior in Michigan, New York, New Hampshire, and Maine ( DeWalt et al. 2024). Stewart (1990) reported a univoltine life cycle for this species in Alaska. Larvae of A. dichroa typically inhabit rocky streams and rocky, wave-swept lake shorelines. This species, however, has not been collected in New York since August 1905 (Fig. 38 View Figure 38 ) at 530 m asl (Fig. 39 View Figure 39 ). This sole report is from Old Forge in Level IV Ecoregion Acid Sensitive Adirondacks (58 aa) (Fig. 40 a View Figure 40 a ) under the old name Perlodes lineata ( Smith, 1917) ( Needham and Claassen 1925) . The New York specimen has also been referred to as. A. minor Klapalek, 1912 ( Hanson 1942). Further surveys targeting suitable high elevation habitats in the Adirondacks are needed to determine its status in the state.