Glyphocyphidae

Glyphocyphidae is an extinct family of sea urchins in the class Echinoidea. These slow-moving low-level epifaunal grazers lived from the Cretaceous to the Paleogene periods (136.4 to 48.6 Ma).

Glyphocyphidae

Glyphocyphidae is an extinct family of sea urchins in the class Echinoidea. These slow-moving low-level epifaunal grazers lived from the Cretaceous to the Paleogene periods (136.4 to 48.6 Ma).