|Name: Hemicidaris intermedia
Locality: Novion, France
Showcase: Historical geology; Cretaceous
Size: D=ca. 3 cm
Sea urchin with long (5-7 cm) tapering spines. Hemicidaris grazed algae living on rocks on the sea bottom. Fossils of this genus are known from Middle Jurassic through Early Cretaceous.