from The Century Dictionary and Cyclopedia

  • n. A genus of fossil ammonoid cephalopods, type of the family Prolecanitid√¶, with smooth or costate, compressed, discoidal, and involute shells and broadly hastate or rounded lobes and saddles on the suture-lines. The species ranges from Middle Devonian to Lower Carboniferous in North America, Europe, and Asia.


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