Atrypa
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A`try´pa
n. | 1. | (Paleon.) A extinct genus of Branchiopoda, very common in Silurian limestones. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
n. | 1. | (Paleon.) A extinct genus of Branchiopoda, very common in Silurian limestones. |