- Phylum:
Chordata class:
Chondrichthyes Subclass:
Holocephali Order: †
Helodontiformes Family: †Helodontidae Genus: †Helodus Ag****iz, 1838 Type
species Helodus...
- Orodontiformes, Petalodontiformes, Iniopterygiformes, Debeeriiformes,
Helodontiformes and
Eugeneodontiformes were
formerly united under the
superorder Paraselachimorpha...
-
Orodontiformes Zangerl, 1981 †Order
Petalodontiformes Zangerl, 1981 †Order
Helodontiformes Patterson, 1965 †Order
Iniopterygiformes Zanger, 1973 †Order Debeeriiformes...
-
Helicoprionidae were
historically excluded based on
divergent morphology)
Helodontiformes Iniopterygiformes Menaspiformes Orodontiformes Petalodontiformes Psammodontidae...
- (Cochliodontidae), Harpago****utor sp. (Chondrenchelyidae),
Helodus ?simplex (
Helodontiformes),
Onychoselache (shark fin spines),
Platyxystrodus sps. (Chondrenchelyidae)...
