Phylum Chordata

Basic Overview

• Four main qualities make a Chordate. At some time during their development (humans included) Chordates have– A Notocord– Pharyngeal Gill Slits– Post-anal tail– A Hollow dorsal nerve cord

The Notochord

Pharyngeal Gill Slits

Post-anal tail

Tubular Nerve Chord

Phylum Chordata -Subphylum Urochordata (tunicates)-Subphylum Cephalochordata(lancelets)-Subphylum Vertebrata(Craniata)

Class Agnatha Jawless fish; hagfish and lampreys

Class ChrondrichthesSharks, skates and rays

Class OsteichthesBony fish

Class ActinopterygiiRay- finned fish

Class SarcopterygiiLobe-finned fish

http://trc.ucdavis.edu/biosci10v/bis10v/media/ch16/vertebrate_evolution.html

Pictures of classes

hagfish

lamprey

shark ray

General Bony Fish

Ray finned fish

Lobe-finned fish