Neognathostomata


The Neognathostomata are a superorder of sea urchins.

Description and characteristics

They are distinguished from other sea urchins by their irregular shape and a highly modified feeding lantern. The group includes the well known sand dollars, as well as some less familiar and extinct forms.

Taxonomy

Image:Clypeaster_reticulatus_both_sides.jpg|thumb|Test of a Clypeaster reticulatus.
Image:Mellita_longifissa.jpg|thumb|Mellita longifissa.
Image:Echinolampas hemisphaerica MHNT Burdigalien Bollene 84 dos.jpg|thumb|Fossil of an Echinolampas hemisphaericus.