• Home
• Taxonomy
• • Bacteria
  • Animals
  • • Protozoa
    • Metazoans
    • • Lobopodians
      • Cnidarians
      • Arthropods
      • Molluscs
      • Echinoderms
      • • Crinoids
        • Somasteroida
        • Cystoids
        • Asteroids
        • Ophiuroids
        • Stylophorans
        • Edrioasteroids
        • Echinoids
        • Eocrinoids
        • Glyptocystids
        • Blastoids
        • Homoiostelea
        • Homostelea
      • Chordates
      • Hemichordates
      • Brachiopods
      • Bryozoans
      • Annelids
      • Priapulids
      • Archaeocyathids
      • Porifera
  • Plants
  • Trace fossils
  • Problematica
  • Fakes
• Map search
• Palaentology-search
• Stratigraphy
• Minerals
• Links
• References
• Contacts
• Site map

      A class of echinoderms comprising "sea stars"-like animals of generalized structure, the jaws often only partly developed, and the skeletal elements of the arm arranged in a double series of transverse rows termed metapinnules. Their evolutionary history is short - they occur since Lower to the Middle Ordovician. Source: Mergl, 2002 http://www.kbi.zcu.cz/veda/paleontologie/zoopaleontologie/ostnokozci/index.php

Img. 168: Basic morphology of Somasteroida

Inv. no.
Taxonomy
Description

back