Neognathostomata

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Neognathostomata
Temporal range: Lower Jurassic–recent
Echinocyamus pusillus.jpg
Echinocyamus pusillus
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Subclass: Euechinoidea
Infraclass: Irregularia
Superorder: Neognathostomata
Smith, 1981
Orders

Cassiduloida
Clypeasteroida
Echinolampadoida

The Neognathostomata are a superorder of sea urchins.

Contents

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

Test of a Clypeaster reticulatus (Clypeasterina). Clypeaster reticulatus both sides.jpg
Test of a Clypeaster reticulatus (Clypeasterina).
Mellita longifissa ("sand dollar"). Mellita longifissa.jpg
Mellita longifissa ("sand dollar").
Fossil of an Echinolampas hemisphaericus (Echinolampadoida). Echinolampas hemisphaerica MHNT Burdigalien Bollene 84 dos.jpg
Fossil of an Echinolampas hemisphaericus (Echinolampadoida).

References