Century Dictionary and Cyclopedia
- An epithet applied to certain fossil hydrozoans the polypary of which has a row of cellules on each side: opposed to monoprionidian. Such hydrozoans are chiefly confined to the Lower Silurian and Cambrian formations.
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This quickly got bigger and weirder than originally intended, so now it's housing terms that relate to the study of dinosaurs and other prehistoric creatures. See also Dinosaurs, Pterosaurs, Ichthy...
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