Abstract

Cymatonautilus is a new record from Kutch with precise stratigraphic background. Being a temporally restricted but geographically widely distributed genus, Cymatonautilus is considered as a fleeting taxon. It cryptically appeared during the latest early Callovian and survived only up to the middle Callovian, but dispersed rapidly through a long belt on both sides of the Tethys. Its systematic position is revised, and derivation from paracenoceratid lineage is suggested.

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