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Echinoderms

Echinodermata is a phylum of marine organisms usually characterized by their five-point symmetry. The first definitive echinoderms appeared just before the start of the Cambrian period. This phylum is the largest on the planet that has no freshwater or terrestrial species. Some types of animals that are echinoderms include: starfish, brittle stars, sea urchins (echinoids), sea cucumbers and crinoids.

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  1. Texas Cretaceous Fossils: Starfish and Crinoids

    • Album created by JamieLynn
    • Updated
    • 35 images
    • 1 image comment
    • 35 images
    • 1 image comment

  2. Late Jurassic echinoderms of European Russia

    Echinoderms in question do not get preserved apart from isolated fragments and spines which are in turn abundant in some locations. For example, echinoid spines are numerous in Fili Park of Moscow, but their tests are impossible to find. Crinoid stem fragments are large in Callovian/Oxfordian (calyx still unknown) but get tiny in the late Volgian turning almost invisible. Callyxes and complete specimens are yet to be found in the region. Known genera:
     
    echinoids: Echinobrissus, Holectypus, Plegiocidaris, Rhabdocidaris;
    crinoids: Cyclocrinus , Pentacrinus;
    starfish: Goniaster, Geocoma.
    • Album created by RuMert
    • Updated
    • 9 images
    • 2 image comments
    • 9 images
    • 2 image comments

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