: a genus (the type of the family Perisphinctidae) comprising discoidal ammonites having bifurcating ribs not interrupted on the ventral side and being characteristic of the Upper Jurassic

Word History


New Latin, from peri- + -sphinctes (from Greek sphinktos tightly bound, from sphingein to bind fast)

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Dictionary Entries Near Perisphinctes

Cite this Entry

“Perisphinctes.” Dictionary, Merriam-Webster, Accessed 13 Apr. 2024.

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