- and belts. Bardack,
David (November 1, 1991). "First
Fossil Hagfish (
Myxinoidea): A
Record from the
Pennsylvanian of Illinois". Science. 254 (5032): 701–703...
-
paraphyletic (jawless vertebrates; 100+ species)
class Cyclostomata Infraclass Myxinoidea or
Myxini (hagfish; 65 species)
Infraclass Petromyzontida or Hyperoartia...
- †Myxinikela
Myxinoidea (crown group)...
- 2023-04-26. Bardack,
David (November 1, 1991). "First
Fossil Hagfish (
Myxinoidea): A
Record from the
Pennsylvanian of Illinois". Science. 254 (5032): 701–703...
- (e.g., Petromyzon, Lampetra, Entosphenus, Geotria, Mordacia)
Order 2.
Myxinoidea (e.g., Myxine, Bdellostoma)
class 2. †Osteostraci (e.g., †Cephalaspis...
