Download Building Cladograms

Building A Dinosaur Cladogram
The following table lists six key traits found in various species of fossil dinosaurs.
Construct a cladogram showing the relationships between the seven species listed in the
table, based on the presence or absence of these six traits.
Dinosaur Species
Allosaurus
Archaeopteryx
Pachycephalosaurus
Parasaurolophus
Plateosaurus
Stegosaurus
Triceratops
Hole
in Hip
Socket
X
X
X
X
X
X
X
Backward
extension of
pelvic bone
Unequal enamel
layer on tooth
Shelf at base of
skull
Grasping hand 3-toed hind
foot
X
X
X
X
X
X
X
X
X
X
X
X
X
X