Hyolithida
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| Hyolithida Temporal range:
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| File:Hyoliths02.JPG | |
Scientific classification 
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| Kingdom: | Animalia |
| Class: | †Hyolitha |
| Order: | †Hyolithida Sussoiev, 1957 |
| Families | |
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See text | |
The Hyolithida are lophophorates, one of the two orders of 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, tusk-like appendages. The Hyolithida were probably bottom feeders living in shallow water, and had tentacules.[2]
References
[edit | edit source]Further reading
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