Character Details
notochord
notochord, a long cartilagenous tube running under the nerve cord, flexible, but serving as a stiffening structure against which muscles operate
cartilagenous skeleton
skeletal structures made of cartilage, replaced during development by phosphatic bone in most groups
pharynx with gill slits
gill slits and pharynx, for feeding, primitively
+-Deuterostomata
+-Echinodermata
+-Hemichordata
+-CHORDATA <<<<< Taxon for this page
+-Urochordata
+-Cephalochordata
+-Craniata
+-Mixinoidea
+-Vertebrata
| +-Hyperoartia
| +-Jawless Fishes
+-Gnathostomata
+-Placodermi
+-Chondrichthyes
+-Teleostomi
+-Acanthodii
+-Osteichthyes
+-Actinopterygii
+-Sarcopterygii
| +-Coelacanthimorpha
| +-Dipnoi
+-Tetrapoda
+-Amphibia
+-Amniota
+-Synapsida
| +-Primitive Synapsids
| +-Mammalia
| +-Monotremata
| +-Marsupialia
| +-Eutheria
| +-Edentata
| +-Glires
| +-Archonta
| +-Insectivora
| +-Carnivora
| +-Ungulata
+-Reptilia
| +-Testudines
+-Diapsida
+-Primitive Diapsids
+-Sauria
+-Ichthyosauria
+-Sauropterygia
+-Lepidosauromorpha
+-Archosauromorpha
+-Crocodylomorpha
+-Pterosauria
+-Dinosauria
