| Campodus Temporal range: Carboniferous, | |
|---|---|
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| Teeth of C. agassizianus from Derbyshire, England | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Order: | † Eugeneodontiformes |
| 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]
