Palaeopneustidae

Palaeopneustidae

[¦pāl·ē·ō′nü·stə‚dē]
(invertebrate zoology)
A family of deep-sea echinoderms in the order Spatangoida characterized by an oval test, long spines, and weakly developed fascioles and petals.
References in periodicals archive ?
The Echinoneidae, Nucleolitidae, Urechinidae, Echinocorythidae, Calymnidae, Pourtalesiidae, Palaeostomatidae, Aeropsidae, Palaeopneustidae, Hemiasteridae and Spatangidae.