There are about 7,600 extant species of echinoderm as well as about 13,000 extinct species. All echinoderms are marine, but they are found in ... List of echinoderm orders · Sea urchin · Sand dollar · Ctenocystoidea |
30 окт. 2024 г. · blastoid (class Blastoidea). genus Cryptoblastus. genus Pentremites · carpoid (class Carpoidea) · crinoid (class Crinoidea; many extant species). |
Fossil Record. Today, Echinodermata is a diverse phylum, with numerous species in five classes: Asteroidea (star fish), Crinoidea (sea lilies and feather stars ... |
Phylum Echinodermata comprises nearly 7000 species and is divided mainly into five classes, namely, Asteroidea (sea stars), Crinoidea (feather stars and sea ... |
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