Heptageniinae
Larval Diagnosis
The combination of having a row of setae on the ventral surface of maxillae (Fig. 58) and forefemora without a dorsal projection (Fig. 82) will distinguish larvae of Heptageniinae from the Ecdyonurinae and the Rhithrogeninae.
Adult Diagnosis
Adults of Heptageniinae are characterized by the presence of distinct longitudinal and transverse ridges on the prosternum (Figs. 122-123) and the medial depression of the mesothoracic furcasternum is convergent anteriorly (as in Fig. 119).
Distribution
Holarctic, Oriental.
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