Hyolithelmintida

Hyolithelmintida; Temporal range: Early Cambrian – Mid Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
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[]

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

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

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