Definition of Echinoid. Meaning of Echinoid. Synonyms of Echinoid

- habitats, from rocky s****s to hadal zone depths. The fossil record of the Echinoids dates from the Ordovician period, some 450 million years ago. The closest...
- Echinoid fossils are the fossilised remains of sea urchins, spiny marine invertebrates that live on the seabed. Humans have been interested in these fossils...
- Melonites is an extinct genus of sea urchin from the family Palaechinidae. Species belonging to this genus lived during the late Mississippian (Meramecian)...
- The Gnathostomata are a superorder of sea urchins, including the familiar sand dollars. Gnathostomatans are irregular in shape, but unlike other irregular...
- received, on the recommendation of Euan Clarkson, a Carnegie Award to study echinoid fossil distribution in the Aalenian (Inferior Oolite) of the Cheltenham...
- Irregularia is an extant infraclass of sea urchins that first appeared in the Lower Jur****ic. These particular sea urchins are distinguished from other...
- Generalized pedicellaria of an (a) asteroid and (b) echinoid...
- inhabits littoral regions of the Atlantic Ocean. As a member of the basal echinoid order Cidaroida, its morphological, developmental and molecular genetic...
- fossils found in this sequence include the brachiopod Terebratulina and the echinoid Conulus. The former Upper Chalk by comparison is softer than the underlying...
- prehistoric echinoids is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be echinoids, excluding...