Acrotemnus Temporal range:
Turonian, | |
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Acrotemnus holotype | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | †Pycnodontiformes |
Family: | †Pycnodontidae |
Genus: | †Acrotemnus Agassiz, 1836 |
Type species | |
†Acrotemnus faba Louis Agassiz, 1836
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Species | |
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Synonyms | |
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Acrotemnus is an extinct genus of marine pycnodontid ray-finned fish from various areas of the Tethys Sea that lived during the Turonian stage of the Upper Cretaceous. The genus comprises three species A. faba,[1] A. streckeri, and A. megafrendodon.[2]
Acrotemnus was initially known from just the type species A. faba described by Louis Agassiz in 1843 from specimens collected in Niger.[1] However, Shimada, Portillo, and Cronin, 2021 described the specimen TxVP 43056-3 as Acrotemnus cf. A. streckeri lumping the whole genus Macropycnodon into Acrotemnus.[2]
In its description, Agassiz, 1836 recovers it as a pycnodontid.[1] Shimada, Portillo, and Cronin, 2021 retain this placement in their redescription of A. streckeri, and A. megafrendodon.[2]