This video is called Life Science – Echinoderms.
From Fossil Roulette:
30 January 2015
The early history of major groups of animals is often messy and mysterious. The suite of features that make those groups distinctive today show up piecemeal in different combinations in early species, like Haimacystis.
A long, thin column of discs and a flattened pod with a few wispy arms make up the body of this individual of Haimacystis. The animal is part of the same group that includes living sea stars, sea cucumbers, and intricately crowned sea lilies. The group also includes little-known, extinct animals like rhombiferans and corkscrew-armed gogiids.
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