Biology:Campodus
| Campodus | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Holocephali |
| Order: | †Eugeneodontida |
| Clade: | †Caseodontoidea |
| Genus: | †Campodus Koninck, 1844 |
| Species[1] | |
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Campodus is an extinct genus of eugeneodont holocephalans from the Carboniferous.[1][2] Likely one of the earliest and most basal caseodontoids, it can be characterized by its broad, ridge-ornamented crushing teeth made of various types of dentine. The type species, C. agassizianus, was originally described in 1844 based on a small number of teeth from the Namurian of Belgium.[3]
Additional fossils have been referred to the genus. These include Belgian specimens referred by Lohest (1884), fossils from Missouri referred by Zangerl (1981), and symphyseal tooth-whorls from Nebraska and Kansas referred by Eastman (1902).[4] The tooth whorls were given their own species, C. variabilis. They shared some similarity to a massive "Agassizodus" jaw apparatus found in Osage, Kansas and described by St. John & Worthen (1875). This has led some authors to the conclusion that Agassizodus and Campodus were synonyms.[5] However, others note that clearly identifiable Campodus teeth have not been found in the same areas from which Agassizodus was originally described.[4] Ginter (2018) concluded that Eastman's "C. variabilis" and St. John & Worthen (1875)'s "Agassizodus" belonged to neither Campodus nor Agassizodus, and instead represented a new unnamed genus. Ginter additionally referred a specimen from Derbyshire, England to Campodus agassizianus.[3]
References
- ↑ 1.0 1.1 "†Campodus de Koninck 1844". Paleobiology Database. Fossilworks. http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34449.
- ↑ Hay, O.P. (1902). Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey. 179. https://www.biodiversitylibrary.org/bibliography/20094#/summary.
- ↑ 3.0 3.1 Ginter, Michał (2018). "The dentition of a eugeneodontiform shark from the Lower Pennsylvanian of Derbyshire, UK". Acta Palaeontologica Polonica 63 (4): 725-735. doi:10.4202/app.00533.2018. http://www.app.pan.pl/archive/published/app63/app005332018.pdf.
- ↑ 4.0 4.1 Zangerl, R. (1981). Chondrichthyes I – Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag. pp. i–iii, 1–115.
- ↑ Eaton, Theodore H. (1 October 1962). "Teeth of Edestid Sharks". University of Kansas Publications, Museum of Natural History 12 (8): 347-362. https://www.biodiversitylibrary.org/page/4392898#page/389/mode/1up.
Wikidata ☰ Q542226 entry
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