Hyolithida
| Hyolithida Temporal range:
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Superphylum: | Lophotrochozoa |
| Class: | †Hyolitha |
| Order: | †Hyolithida Sussoiev, 1957 |
| Families | |
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See text | |
The Hyolithida are
hyolithid, the other being the Orthothecida. Most of our knowledge of the hyolithids comes from studies on the Hyolithida.[2] Both orders had an operculum that was not hinged to the conch. However, the Hyolithida are distinct from the Orthothecida in having additional paired, curved, whiskerlike appendages. The Hyolithida were probably bottom feeders living in shallow water, and had tentacules.[2]
References
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- ^ .
Further reading
- Malinky, John M. (1989). "New Early Paleozoic Hyolithida and Orthothecida (Hyolitha) from North America". Journal of Paleontology. 63 (3): 302–319. S2CID 132877043.
- Marek, Ladislav (1976). "On the ontogeny in Hyolithida". Časopis pro mineralogii a geologii. 21 (3): 277–283.
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