- Subphylum vertebrata is divided into 2 divisions such as, Agnatha, the division which lacks jaw and Gnathostomata, the division which bears jaw.
- Agnatha has the Cyclostomata and Gnathostomata is classified into 2 Super Classes such as Pisces, which bear fins and Tetrapoda, which bear limbs.
- Pisces is classified in to class Chondrichthyes and class Osteichthyes.
- Tetrapoda is classified into Class Amphibia, Reptilia, Aves, and Mammals.
Fig. classification of Vertebrata