PARTIAL TAXONOMY OF THE
VERTEBRATES
(a cladistic taxonomy)
PHYLUM Chordata
- Anamniota
- Apoda
- Acraniata
- Agnatha: jawless vertebrates
- Conodontia
- Mixini: Hagfish
- Craniata
- Euagnatha
- Ostracodermii
- Diplorhina (Pteraspidomorphi)
- Monorhina (Cephalospidomorpha): lampreys
- Gnathostomata
- Placodermi
- Chondrichthyes: Cartilagenous fish
- Elasmobranchii: Sharks and rays
- Holocephali: Chimaeras
- Acanthodii
- Osteichthyes: Bony fish
- Actinopterygii: Ray-finned fishes
- Chondrostei: sturgeons and paddlefish
- Neopterygii: gars, bowfins, teleosts
- Sarcopterygii: Lobe-finned fishes
- Dipnoi: Lungfishes
- Crossopterygii: coelacanths
- Tetrapoda
- Amphibia
- Labrynthodontia
- Lepospondylii
- Lissamphibia
- Anura (Salientia): Frogs and toads
- Urodela (Caudata): salamanders, newts
- Apoda (Gymnophona): caecilians
- Amniota
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- Sauropsida
- Anapsida: turtles
- Diapsida
- Ichthyopterygia: extinct fishlike aquatic
reptiles
- Sauropterygia: other extinct aquatic reptiles
(e.g., plesiosaurs)
- Lepidosauria: modern snakes, lizards and
Sphenodon
- Squamata: snakes and lizards
- Archosauromorpha
- Thecodontia
- Pteryosauria: Pterodactyls
- Saurischia: grasping hands, forward
pubis
- Theropoda: Tyrannosaurus
- Ornithischia: backward-pointing pubis;
herbivorous; Tricerotops
- Crocodylia: Crocodiles, alligators,
caimans
- Aves: birds
- Synapsida
- Pelycosauria: sail-backed reptiles (extinct)
- Therapsida: mammal-like reptiles
- Mammalia
- Prototheria: Monotremes
- Theria
- Metatheria: Marsupials
- Eutheria: Placentals