Kingdom Animalia Subphylum Vertebrata Superclass Osteichthyes Rank Species | Phylum Chordata Infraphylum Gnathostomata Class Actinopterygii | |
Echidnocephalus troscheli is an extinct, prehistoric halosaur. Fossils are found from Campanian strata of Westphalia, Germany. The complete and incomplete fossil specimens that have been found suggest an animal already looking very much like modern halosaurs.
References
Echidnocephalus Wikipedia(Text) CC BY-SA