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WA Mayfly Description |
Taxonomic Name (Common Name) | Larva (Nymph) | Subimago (Dun) Imago (Spinner) |
Ephemerellidae (Spiny Crawler Mayfly ) | Diverse shapes and sizes, but usually robust, sometimes flattened, often with tubercles or spines; always with 3 tails; wholly dorsal gills (never on Ab2) which slightly overlap and undute sequentially. | 3 tails; pronounced angle on fore margin of hind wings; short unattached intercalary veins on outer margin of FW. |