During development, echinoderm coelom is divided into the metacoel, mesocoel ... echinoderms, some 68% of species develop using a yolk-feeding larva. Sea urchin · Sand dollar · Ctenocystoidea · Fromia indica |
Echinoderm evolution and model species. The echinoderm phylum dates at least to the Cambrian period, about 500-540 million years ago, when crinoids, animals ... |
The egg develops directly into a free-swimming larva of bilateral structure, adapted in most cases for pelagic life. |
23 июл. 2024 г. · The Cambrian fossil record provides valuable insights into the origin and early evolution of echinoderms over half a billion years ago. ▫ ... |
Echinoderms are a phylum of invertebrate deuterostomes that are morphologically characterized by a fivefold (pentameric) symmetric adult body plan. |
Echinoderm species exhibit a variety of developmental strategies, from maximally indirect development, where adults emerge from metamorphosis of a larva with ... |
In the post-genomic era, echinoderm developmental model systems present a unique opportunity to interrogate the mechanisms of morphological evolution. Indeed ... |
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