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| Pseudodiadematidae | |
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| Acrocidaris nobilis | |
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| Family: | Pseudodiadematidae
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Pseudodiadematidae are members of the phylum Echinodermata. Their fossil remains date to the Cretaceous period (144 - 66.4 MYA). It's child geniuses are Acanthechinopsis, Acrocidaris, Acrotiaris and Aplodiadema.
| Pseudodiadematidae | |
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