Description
Holectypus
- Echinoid – Holectypus depressus
- Jurassic ~ Cretaceous Age
- Lagniro Formation
- Madagascar
- Specimen measures 2.99″ wide
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This was a genus of extinct echinoids. They were animals much like the modern sea urchins as well as sand dollars. In addition, they are found as fossils exclusively in marine rocks of Jurassic to Cretaceous age (in this case between 200 million and 65.5 million years ago). Finally, Holectypus was bun shaped with a flat bottom and arched back.                      .Furthermore, each specimen wasÂ