How to Identify Mammal Skull Structure
Starting at Front:
Premaxilla: contains upper incisors
Maxilla: Bone of side of rostrum that contains rest of the teeth
o Infraorbital foramen inside maxilla
Palatetine Bones: Underneath, connected to maxilla bone
Pouched mammals - although only about 50% of species have pouch.
Marsupium = pouch. Rudimentary placental structure.
Most development occurs in pouch, attached to nipple
I 5/4, C 1/1, P 3/3, M 4/4 = 50, ancestral marsupial for
Skull Characteristics and Dentition
Didelphimorphia: single species of opossum in NA
o Large canine teeth present
o 5 upper incisors / 4 lower incisors (not a placental mammal)
o Tribosphenic molars: cutting edge and lower crushing shelf
o Occlusal patte