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.
familia Apatopygidae Kier, 1962
familia Archiaciidae Cotteau & Triger, 1869 †
order Cassiduloida
Super-familia Cassidulina (Philip, 1963b)
familia Cassidulidae (L. Agassiz and Desor, 1847)
Super-familia Neolampadina (Philip, 1963b)
familia Neolampadidae (Lambert, 1918a)
familia Pliolampadidae (Kier, 1962) †
order Clypeasteroida A.Agassiz, 1872 ("sand dollars")
sous-order Clypeasterina
familia Clypeasteridae L. Agassiz, 1835
familia Fossulasteridae Philip & Foster, 1971 †
familia Scutellinoididae Irwin, 1995 †
familia Conoclypidae von Zittel, 1879 †
familia Faujasiidae Lambert, 1905 †
familia Oligopygidae Duncan, 1889 †
familia Plesiolampadidae Lambert, 1905 †
sous-order Scutellina
infra-order Laganiformes
familia Echinocyamidae Lambert & Thiéry, 1914
familia Fibulariidae Gray, 1855
familia Laganidae Desor, 1858
infra-order Scutelliformes
familia Echinarachniidae Lambert in Lambert & Thiéry, 1914
familia Eoscutellidae Durham, 1955 †
familia Protoscutellidae Durham, 1955 †
familia Rotulidae Gray, 1855
super-familia Scutellidea Gray, 1825
familia Abertellidae Durham, 1955 †
familia Astriclypeidae Stefanini, 1912
familia Dendrasteridae Lambert, 1900
familia Mellitidae Stefanini, 1912
familia Monophorasteridae Lahille, 1896 †
familia Scutasteridae Durham, 1955 †
familia Scutellidae Gray, 1825
familia Taiwanasteridae Wang, 1984
familia Scutellinidae Pomel, 1888a †
familia Clypeidae Lambert, 1898 †
familia Clypeolampadidae Kier, 1962 †
order Echinolampadoida
familia Echinolampadidae Gray, 1851a
familia Nucleolitidae L. Agassiz & Desor, 1847 †
familia Pygaulidae Lambert, 1905 †
genus Pygolampas Saucède, Dudicourt & Courville, 2012 †
