Phylum Chordata

Subphylum  Urochordata

(tunicates) 

Subphylum  Cephalochordata

(Amphioxus:  Branchiostoma)

whole mount

cross section

Subphylum Vertebrata

     Class    

     Cephalasidomorphi    

     (lampreys)

    Class Chondrichthys 

    (sharks and rays:

    cartilagenous fish)

    Class Osteichthys (bony

    fish)

    Class Amphibia

    (frogs salamanders toads

    newts)

    Class Testudines

    (turtles)

       and

    Class Lepidosauria

    (snakes, lizards)

    Class Aves   (birds)

    Class Mammalia                                       

    (mammals)

    Mammal Skulls

Frog Dissection

Frog Skin  (cross section)