Myxini
Pteraspidomorphi
???
Thelodonti
Anaspida
Osteostraci
Gnathostomata
vertebral elements
lateral line
2-3 semicircular canals, etc. etc. etc.
paired fins
epicercal tail
asymmetrical tail
cellular dermal bone
sclerotic ring around eyes
jaws. . .
(see p. 158 for more. . .)
single median dorsal nasal opening
| Previous slide | Next slide | Back to first slide | View graphic version |