abstract
adulthood
anatomy
ancestor
ancestral
anterior
appendages
backbone
bony
cartilaginous
central
cetaceans
classification
classifying
cloud
columella
concept
descendants
dinosaurs
dominate
early
end
evolutionarily
evolutionary
extant
fish
frogs
gills
gut
history
illustration
interpretations
intervertebral
invertebrates
irrevocably
jaws
keyword
keywords
larval
midbrain
morphology
nervous
overview
physiology
primitive
proper
relationship
rod
series
sharks
species
spinal
spiny
stiff
sturgeon
tag
tags
tail
taxonomy
term
terms
traditional
tube
typography
unnamed
vertebral
vertebrate
word
words