Fossil crinoid remains

Numéro d’image : 13355567
Fossil crinoid remains
Fossil crinoid remains. Crinoids belong to a group of marine organisms, the Echinodermata, that also include the starfish and sea urchins. Crinoids have lived in seas the world over since very ancient geologic times, with certainty from the Ordovician period, about 500 million years ago, and maybe even earlier. They still live today but in much less abundance. They grow on long and thin, segmented stems carrying a cluster of plume-like waving arms that are suggestive of flowers, inspiring their byname 'Sea Lilies'. However, they are animals, not plants. This partly brecciated specimen is completely pyritized and comes from Jurassic shales on the Dorset coast of southern England, UK. Actual dimension of specimen is 30 x 44 cm.
Licence : Droits gérés
Crédit: Science Photo Library / Wiersma, Dirk
Taille de l’image : 4963 px × 3594 px
Model Release : Non requis
Property Release : Non requis
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