Definition of Somasteroidea. Meaning of Somasteroidea. Synonyms of Somasteroidea

Here you will find one or more explanations in English for the word Somasteroidea. Also in the bottom left of the page several parts of wikipedia pages related to the word Somasteroidea and, of course, Somasteroidea synonyms and on the right images related to the word Somasteroidea.

Definition of Somasteroidea

No result for Somasteroidea. Showing similar results...

Meaning of Somasteroidea from wikipedia

- The Somasteroidea, or Stomasteroidea, is an extinct order of asterozoan echinoderms first defined in 1951 by W. K. Spencer. Their first appearance in...
- starfish or sea stars), Ophiuroidea (the brittle stars and basket stars), Somasteroidea (early asterozoans from which the other classes most likely evolved)...
- Stelleroidea as the only class within the subphylum Asterozoa, with Somasteroidea, Asteroidea, and Ophiuroidea as subclasses. By a 1980 revision of the...
- fossil record in the Cambrian. The first known asterozoans were the Somasteroidea, which exhibit characteristics of both groups. Starfish are infrequently...
- each series running perpendicular to the ambulacra is a feature of the Somasteroidea. However, Villebrunaster lacks axially oriented ossicles along the lateral...
- in any of the above taxonomies include: Cryptosyringida Smith, 1984 Somasteroidea Spencer, 1951 Stenuroidea Spencer, 1951 Coronoidea Brett et al., 1983...
- Subphylum: Eleutherozoa Bell, 1891 classes Subphylum Asterozoa class †Somasteroidea class Asteroidea class †Stenuroidea class Ophiuroidea Subphylum Echinozoa...