Nymphs of the Northeastern Nearctic Species of Neoleptophlebia Kluge, 1997 and Paraleptophlebia Lestage, 1917 (Ephemeroptera: Leptophlebiidae).

Although male imagos of the three species of Neoleptophlebia and seven species of Paraleptophlebia known from the northeastern Nearctic region (i.e., eastern Canada and northeastern United States) are reasonably well-known and can be reliably keyed, nymphs are not as well-known and often cannot be reliably identified using the existing keys.