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
Temporal range:
Turonian, 93.9–89.8 Ma
Acrotemnus holotype
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pycnodontiformes
Family: Pycnodontidae
Genus: Acrotemnus
Agassiz, 1836
Type species
Acrotemnus faba
Species
  • Acrotemnus faba
    Agassiz, 1836
  • Acrotmenus streckeri
    Shimada, Portillo, and Cronin, 2021
  • Acrotmenus megafrendodon
    Shimada, Portillo, and Cronin, 2021
Synonyms

Description

edit

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]

Classification

edit

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]

See also

edit

References

edit
  1. ^ a b c L. Agassiz. 1836. Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel
  2. ^ a b c Shimada, Kenshu; Portillo, Dianne; Cronin, Timothy (August 2021). "A new pycnodont specimen (Actinopterygii: Pycnodontiformes) from the Upper Cretaceous of Big Bend National Park, Texas, USA, confirming the bony fish genus Macropycnodon as a junior synonym of Acrotemnus". Cretaceous Research. 124. doi:10.1016/j.cretres.2021.104797. S2CID 233924239. Retrieved 1 December 2023.