Another bio thing lol

Phylum Chordata

Notochord, dorsal hollow nerve cord, pharyngeal slits, post-anal tail

Subphylum Cephalochordata

Lancelets (small, blade-shaped marine chordates)

Subphylum Urochordata

Tunicates/sea squirts (marine suspension feeders)

Subphylum Vertebrata

Craniates with backbone enclosing a spinal cord and elaborate skull

Agnathans

jawless vertebrates

Class Myxini

hagfishes (marine with cartilaginous skull and no vertebrae)

Class Cephalaspidomorphi

Lampreys (cartilaginous segments surrounding notochord)

Clade Gnathostomes

jawed vertebrates

Class Condrichthyes

Sharks (skeleton of cartilage)

Class Osteichthyes

Bony fish (gnathosomes with bony endoskeleton)

Class Actinopterygii

Ray-finned fish (fins supported by long, flexible rays)

Class Sarcopterygii

Lobe-finned fish/lungfish/coelacanths (muscular pectoral and pelvic fins)

Clade Tetrapods

four-limbed vertebrates, gnathostomes with limbs and feet with digits

Class Amphibia

Moist skin for gas exchange and require water for reproduction

Order Urodela

salamanders (tails)

Order Anura

Frogs and toads (lack tails)

Order Apoda

Caecilians (legless, resemble worms)

Clade Aminotes

Tetrapods with terrestrially adapted amniotic eggs

Class Reptilia

Ectothermic tetrapods with scales and shelled eggs

Class Mammalia

Aminotes with mammary glands, hair, and high metabolic rates