from the GNU version of the Collaborative International Dictionary of English
- n. A genus of ganoid fishes, found in strata of the new red sandstone, and the lias bone beds.
from The Century Dictionary and Cyclopedia
- n. A genus of heterocereal ganoid fishes characterized by having the anterior rays of the pectoral fins not, articulated and scales marked with irregular wrinkles. It is common in the Mesozoic rocks.
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