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Ullen Mammoth - Mammuthus Primigenius - Vertebra - Fossilt fragment - 510 mm - 200 mm
Nr. 79891045
Nr. 79891045
Cystoids are an extinct group of echinoderms, the simplest class of echinoderms with skeletal tissue. The shape is spherical, similar to an apple.
Characteristics: They have unique hole structures on their bony plates for breathing.
Cystoids lived in the Ordovician and Silurian periods and became extinct in the late Devonian period.
Cystoids are benthic organisms that live on the ocean floor
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