Clydonautilidae

Extinct family of molluscs

The Clydonautilidae are Middle and Upper Triassic nautiloid cephalopods, which are derivatives of the clydonautiloidean family Liroceratidae, that have generally smooth, involute, globular to compressed shells, characterized by a suture with prominent lobes and saddles. The family is known to contain five genera, These are:Clydonautilus Callaionautilus Cosmonautilus Proclydonautilus Styrionautilus

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