// Workers AI · dad joke modeWhat did the Hyolithid say? Shell yeah.
| Hyolithida Temporal range: | |
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Scientific classification  | |
| Kingdom: | Animalia |
| Class: | †Hyolitha |
| Order: | †Hyolithida Sussoiev, 1957 |
| Families | |
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See text | |
Hyolithida is an extinct order of lophotrochozoans, one of the two of hyoliths, the other being the Orthothecida. Most information on the hyolithids comes from studies on the Hyolitha.[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 tentacles.[2]
Families
[edit]Known families of the Hyolithida are:[3]
- †Aimitidae Sysoiev, 1968
- †Aladracidae Geyer, 2017
- †Altaicornidae Sysoiev, 1970
- †Amydaicornidae Valkov, 1975
- †Angusticornidae Sysoiev, 1968
- †Australothecidae Malinky, 2009
- †Carinolithidae Marek in Valent, Fatka, Szabad & Vokáč, 2011
- †Crestjahitidae Sysoiev, 1968
- †Galicornidae Valkov, 1975
- †Hyolithidae Nicholson, 1872
- †Nelegerocornidae Meshkova, 1974
- †Notabilitidae Sysoiev, 1968
- †Pauxillitidae Marek, 1967
- †Pterygothecidae Sysoiev, 1958
- †Similothecidae Malinky, 1988
- †Trapezovitidae Valkov, 1975
References
[edit]- ↑ Malinky, J. M. (2009). "Permian Hyolithida from Australia: The Last of the Hyoliths?". Journal of Paleontology. 83 (1): 147–152. Bibcode:2009JPal...83..147M. doi:10.1666/08-094R.1.
- 1 2 Marek, Ladislav; Yochelson, Ellis L. (1976). "Aspects of the biology of Hyolitha (Mollusca)". Lethaia. 9 (1): 65–82. Bibcode:1976Letha...9...65M. doi:10.1111/j.1502-3931.1976.tb00952.x.
- ↑ "IRMNG - Hyolitha †". Interim Register of Marine and Nonmarine Genera. 2021. Retrieved 22 January 2026.
Further reading
[edit]- Malinky, John M. (1989). "New Early Paleozoic Hyolithida and Orthothecida (Hyolitha) from North America". Journal of Paleontology. 63 (3): 302–319. Bibcode:1989JPal...63..302M. doi:10.1017/S0022336000019454. JSTOR 1305500. S2CID 132877043.
- Marek, Ladislav (1976). "On the ontogeny in Hyolithida". Časopis pro mineralogii a geologii. 21 (3): 277–283.
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