Holectypus Explained

Holectypus is an extinct genus of sea urchin. It lived from the Jurassic to the Cretaceous.[1] Fossils have been found all around the world.

Notes and References

  1. Book: Clark, William Bullock . The Mesozoic and Cenozoic Echinodermata of the United States . Clark . William Bullock . Twitchell . M. W. . 1915 . Govt. print. off . Washington.

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