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Redescription critique des genres Thryptodus, Pseudothryptodus et Paranogmius, poissons marins (Teleostei, Tselfatiiformes) du Crétacé supérieur des Etats-Unis, d'Egypte et de Libye

par Taverne, Louis Paul
Référence Belgian journal of zoology, 133, 2, page (163-173)
Publication Publié, 2003-07

Article révisé par les pairs

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Résumé :

The osteology of three marine Upper Cretaceous teleosts, Thryptodus and Pseudothryptodus, from the U.S.A., and Paranogmius, from Egypt and libya, is studied. These genera belong to the order Tselfatiiformes. Thryptodus and Pseudothryptodus are valid genera quite different from Bananogmius, another tselfatiiform fish with which they are often synonymized. Within the Tselfatiiformes, Thryptodus appears more specially related to Plethodus and less closely to Martinichthys. Pseudothryptodus is also related to Thryptodus but differs from this genus by its snout architecture less specialized. Paranogmius is another valid genus, characterized more particularly by the presence of a subtemporal fossa on the neurocranium, a primitive structure already lost by all other Tselfatiiformes, and of an anteriorly enlarged vomer.