California Department of Fish and Wildlife
Aquatic Biological Assement

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Ephemeroptera Odonata Plecoptera Hemiptera Megaloptera Neuroptera Trichoptera Lepidoptera Coleoptera Diptera Non-Insects

Caenidae Level 1 Level 2



Key Characters

Quadrate operculate gills on segments 2 not fused medially, gills on segments 3-6 with fringed margins. Mesonotum unlike Neoephemeridae. Hind wing pads absent.

Tolerance 7
Distribution CA, OR, WA, AZ, Baja