6$ Vertebrata 



Class Subcl Order 



Stegoselachii (Stensioelliformes, Jagoriniformes, Sten- sil-mis 



sioellida) 



Palaeospondyloidea (Palaeospondyliformes) dev 



CHONDRICHTHYES dev-rec 



Elasmobranchii "^ dev-rec 



Cladoselachii "^ (Pleuropterygii) dev-per 



Pleuracanthodii {Ichthyotomi, Proselachii) dev-tri 

 Selachii ^^° (Euselachii, Plagiostomi, Chondropterygii, dev-rec 



Placoidei) 



Batoidea "^ (Hypotremata, Platosomia) jur-rec 



Holocephali ''^ dev-rec 



Bradyodonti ^^^ (Bradyodontoidea) dev-per 



Chimaerae ^^* (Chimaeroidea) jur-rec 



OSTEICHTHYES (Teleostomi) dev-rec 



Actinopterygii '^^ dev-rec 



Chondrostei ^^"^ (Chondrosteoidea, Palaeopterygii) dev-rec 



Holostei "^ PER-REC 



Teleostei '^^ jur-rec 



'^'^^ Includes: Diplodonti, Diplodontiformes, Xenanthi, Xenacanthi, Xenacan- 

 thoidea. 



'^^^ Includes: Cladodontiformes, Cladoselachoidea, Cladoselachiformes. 



^^° Includes : Pleurostomata, Pleurotremata, Selachoidea, Heterodontiformes, 

 Heterodontoidea, Hexanchoidea, Hexanchiformes, Notidanoidea, Lamnoidea, 

 Lamniformes, Isuriformes, Galeoidei, Squaloidea, Squaliformes, Tectospondyli, 

 Edestidi. 



^^^ Includes: Narcaciontiformes, Torpediniformes, Rajiformes. 



^^^ Includes: Petalodontes, Petalodontiformes. 



^^^ Includes: Eubradyodonti, Chondrenchelyes, Chondrenchelyiformes. 



^^* Includes: Chimaeriformes. 



^^^ Sometimes divided into superorders: chondrostei, holostei, teleostei. 

 Sometimes divided into infraclasses: Polypterei, chondrostei, holostei, 

 TELEOSTEI. Ganoidi = chondrostei + holostei. Neopterygii = holostei + 



TELEOSTEI. 



^^•^ Includes: Tarrasiiformes, Gymnonisciformes, Luganoidiiformes, Phanero- 

 rhynchiformes, Dorypteriformes, Cephaloxeniformes, Bobasatraniiformes, Red- 

 fieldiiformes, Calopteriformes, Perleidiformes, Platysiagiformes, Ospiiformes, 

 Aetheodontiformes, Pholidopleuriformes, Saurichthyiformes, Palaeoniscoidea, He- 

 terocerci, Palaeonisciformes, Polypterini, Brachyopterygii, Polypteriformes, Cla- 

 distia, Cladistioidea, Acipenseroidea, Acipenseriformes, Subholostei, Subholo- 

 steoidea. 



^" Includes: Semionotoidea, Lepidostei, Lepisostei, Lepidosteoidea, Lepiso- 

 steiformes, Ginglymodi, Rhomboganoidei, Pycnodontoidea, Pycnodontiformes, 

 Aspidorhynchoidea, Aspidorhynchiformes, Amioidea, Amiiformes, Pholidopho- 

 roidea, Pholidophoriformes, Pachycormoidea, Pachycormiformes, Protospon- 

 dyli. 



^''s See p. 66 for footnote 158. 



