Hemipneustidae is an extinct family of sea urchins.[1][2]

Hemipneustidae
Fossils of Toxopatagus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Holasteroida
Family: Hemipneustidae
Lambert, 1917

Genera

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References

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