Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: Chondrichthyes
Subclassis: †Euchondrocephali
Ordo: †Petalodontiformes
Familiae: †Belantseidae - †Janassidae - †Petalodontidae - †Pristodontidae
Genera inc. sedis: †Antliodus – †Brachyrhizodus – †Ctenopetalus – †Cynopodius – †Euglossodus – †Glyphanodus – †Mesolophodus – †Netsepoye – †Paracymatodus – †Petalorhynchus – †Polyrhizodus – †Serratodus – †Siksika
Name
†Petalodontiformes Zangerl, 1981
Type family: †Petalodontidae Newberry & Worthen, 1866
References
Zangerl, R. 1981. Chondrichthyes I: Paleozoic Elasmobranchii. in Schultze, H.P. (ed.). Handbook of Paleoichthyology volume 3a. München: Verlag Dr. Friedrich Pfeil. 115 pp. ISBN 978-3-89937-045-4 Reference page.
Links
Paleobiology Database
Petalodontiformes ("thin-plate teeth") is an extinct order of marine cartilaginous fish related to modern day chimaera found in what is now the United States of America and Europe.[1]
Most species are known only from isolated teeth.[1][2] All fossils range from the Carboniferous to the Permian, where they are presumed to have died out during the Permian/Triassic extinction event.[1]
The two best known species are Belantsea montana, from the Carboniferous Bear Gulch, Montana, and Janassa bituminosa, from the upper Permian of Europe, as whole fossil specimens have been found of these two.
References
Lund, Richard, E. D. Grogan, and M. Fath. "On the relationships of the Petalodontiformes (Chondrichthyes)." Paleontological Journal 48.9 (2014): 1015-1029.
Dalla Vecchia, Fabio Marco, and Museo Paleontologico Cittadino. "A new petalodont tooth (Chondrichthyes, Petalodontiformes) from the Lower Permian of the Carnic Alps (Friuli, NE Italy)." Bollettino della Società Paleontologica Italiana 39 (2000): 225-228.
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