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Agassizodontidae
| Description | The Helicoprionidae are an extinct, poorly known family of bizarre holocephalids within the poorly understood order Eugeneodontida. Members of the Helicoprionidae possessed a unique "tooth-whorl" on the symphysis of the lower jaw and pectoral fins supported by long radials. The closest living relatives of the Helicoprionidae and all other eugeneodontids are the ratfishes. The anatomy of the tooth-whorl differed amongst genus and species, some possessing complete spirals (such as those of Helicoprion), others possessing halved spirals (seen in Parahelicoprion), and some with wedged half-spirals (seen in Sarcoprion). Each tooth-whorl is thought to be adapted to a different type of prey, and a different predation strategy. From Wikipedia article at https://en.wikipedia.org/wiki/Agassizodontidae, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | |||||||
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| Source Data |
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| Rank | family | |||||||
| Taxonomy (GBIF) | Life : Animalia : Chordata : Agassizodontidae | |||||||
| Taxonomic Status (GBIF) | accepted | |||||||
| Classification (GBIF) |
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| Scientific Name | Agassizodontidae | |||||||
| Wikipedia | https://en.wikipedia.org/wiki/Agassizodontidae |
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
|---|---|---|---|---|---|
| Agassizodus genus | accepted (GBIF) | No associated record in PBDB | |||
| Campyloprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Helicoprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Hunanohelicoprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Parahelicoprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Sarcoprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Sinohelicoprion genus | accepted (GBIF) | No associated record in PBDB | |||
| Toxoprion genus | accepted (GBIF) | No associated record in PBDB | |||
References
| Benton, M.J. (ed). (1993). The Fossil Record 2. Chapman & Hall, London, 845 pp. - via The Interim Register of Marine and Nonmarine Genera |
| Museum Victoria KEmu database (Oct 2006) - via The Interim Register of Marine and Nonmarine Genera |
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
