1.             Lateral margins on segments 2 & 3 produced into well developed postero-lateral                                 projections (Fig. 1.1); maxillary palpi with three distinct segments and a long apical spine                 (very difficult to see without dissecting out mouthparts, Fig.1.2). . . . . . . . . Dannella lita
 

                Lateral margins of segments 2 & 3 not produced into postero-lateral projections (Fig. 1.3);                 maxillary palpi fused into one segment with a short apical spine (Fig. 1.4). . . . . . . . . . . . .                 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Dannella simplex
 
 
 

 

 

 

 

 

 

Key to Ohio Dannella Nymph Species

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Mayflies of Ohio
(Modified from Allen & Edmunds, 1962)