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]

Hyolithelmintida
Temporal range:
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: incertae sedis
Order: †Hyolithelmintida

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


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