Anotodus
extinct genus of sharks
Anotodus is an extinct genus of thresher sharks that lived during the Neogene. It contains one valid species, Anotodus retroflexus, which has been found in North America, South America, Europe, and Australia.
Taxonomy
Oxyrhina retroflexa was named by Louis Agassiz in an 1838 illustration, which was followed by his text description in 1843. Its holotype is a tooth of unknown provenance housed in the State Museum of Natural History, Karlsruhe. In 1871, Henri Le Hon named Anotodus agassizii for teeth from the Pliocene of Belgium, while acknowledging that it could be the same as O. retroflexa. The former species is now regarded as a junior synonym of the latter; while some authors consider it to belong to Isurus, it is more widely accepted as a distinct genus of alopiid.
Notes
References
Further reading
J. Herman. 1977. Les sélaciens des terrains néocrétacés and paléocènes de Belgique and des contrées limitrophes. Eléments d'une biostratigraphie intercontinentale.
Begin with the source’s own compact description: “Anotodus” is extinct genus of sharks. The dossier treats that line as a proposition to test through Anotodus, extinct and genus, not as a finished interpretation.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated May 18, 2026. The linked authority identifier is Q127500539. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1838, 1843, 1871 and 1977.
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This entry incorporates text from “Anotodus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.