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 Clay Substrate |
Hexagenia nymph |
Pictures Courtsey of E. C. Masteller© |
 A Hexagenia nymph in artifical substrate. |
Fremling, C.R., and G.L. Schoening. 1973. |
Artifical substrates for Hexagenia mayfly nymphs. |
Proceed. First Intern. Conference on Ephemeroptera. 209-211. |
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