Rhipididae

Rhipididae is a family of extinct cephalopods belonging to the subclass Nautiloida. These marine mollusks lived during the Devonian period. They are characterized by a coiled shell, typically evolute, meaning the whorls are widely separated and do not overlap significantly. The shell aperture is often constricted. Rhipididae are known for their distinctive growth lines on the shell surface, which can be wavy or bifurcated. Fossil evidence suggests they inhabited shallow marine environments. The family Rhipididae is part of the order Tarphyceratida. Other notable genera within this family include Rhipidoceras. The study of Rhipididae contributes to understanding the diversity and evolution of early cephalopods. Their extinction marks the end of their lineage.