2.4.2. Eocene
Amiiformes: Ypresian from the deposits of Tamaguélt in
the Tilemsi Valley, Mali (Maliama); Lutetian from Messel,
Germany, Bartonian from Kutschlin, Czech Republic,
Priabonian from Montmartre, France, unspecifi ed early
to middle Eocene from the Xiawanpu Formation, China,
and unespecifi ed middle or late Eocene from Andréevka in
Kazakhstan (Cyclurus); unspecifi ed late early Eocene from
the Green River Formation, Wyoming, USA (Cyclurus
and Amia); unspecifi ed middle Eocene from the Allenby
Formation, British Columbia, Canada (“Amia” hesperia);
Priabonian from the Florissant Formation, Colorado, USA
(Amia). Pycnodontiformes: The youngest fossil-lagerstätte
to yield pycnodonts is the Ypresian-Lutetian from Monte-
Bolca, in Italy (Nursallia veronae, Palaeobalistum,
Pycnodus apodus). Deposits of similar age in France,
UK, Mali, Algeria, Egypt, and Tunisia have provided
isolated dentitions (all cf. Pycnodus), showing that the
group was relatively extended at the time of their last
reliable record.
Poyato-Ariza, F.J. & Martín-Abad, H. 2013. History of two lineages: Comparative analysis of the fossil record in Amiiformes and
Pycnodontiformes (Osteichthyes, Actinopterygii). [Historia de dos linajes: análisis comparativo del registro fósil de Amiiformes
y Pycnodontiformes (Osteichthyes, Actinopterygii)]. Spanish Journal of Palaeontology, 28 (1), 79-90.
No descarte nada.
Si quiere investigar la hipotesis "diente de pez", esto puede ayudarle.