Hyolithelmintida

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Hyolithelmintida
Temporal range: Early Cambrian – Mid Cambrian [1]
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: incertae sedis
Order:† Hyolithelmintida

Hyolithohelminths are phosphatic tubular fossils from the Cambrian period. They were sedentary, possibly infaunal, organisms; once thought to have opercula (hence the comparison with hyoliths), these structures are now understood to be unrelated shells. [1]

References

  1. 1 2 William Schopf, J.; Klein, Cornelis (1992-06-26). The Proterozoic Biosphere: A Multidisciplinary Study. ISBN   9780521366151.


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