The hypothetical ancestral echinoderm is at the center of the graph with evolutionary pathways radiating outward during and following the Cambrian Explosion to establish the major echinoderm body ...

The diversity and abundance of echinoderm fossils is reflected in the Museum's large, world-class collection. Fossil echinoderms are numerous, due in part to the fantastic preservation potential of ...

Fossil echinoderms—including the edrioasteroid ... Independent comparisons of their morphology and ecology during the Cambrian and Ordovician radiations demonstrates that anatomical novelty ...

DR. HUBERT LYMAN CLARK‘S large work, "Echinoderms from Australia", was reviewed in Nature of September 24, 1938. That review and the obituary notice of Dr. Clark in Nature of September 20 ...

All animal evolution for the last half billion years has come from tinkering with these Cambrian body plans. Then, between about 570 and 530 million years ago, another burst of diversification ...

Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known.