These teeth have low, rounded cusps. Humans and other primates have bunodont teeth, so they should look familiar!

Example: Papio spp.- various species of baboons.






Information provided by: http://animaldiversity.ummz.umich.edu

These teeth are characterized y a W-shaped ridge on the occlusal surface of the teeth. Exhibited in shrews. Also notable in shrews is the reddish coloring of the enamel. Another key shrew feature- the double-lobed incisors.






Information provided by: http://animaldiversity.ummz.umich.edu

These teeth are characterized by a V-shaped ridge on the occlusal surface (the surface of the teeth that meet while chewing).

These teeth are exhibited in the Hatian Solenodon, one of the few venomous mammals. Their pronounced second incisors have grooves to deliver a bacteria-laden saliva concoction.






Information provided by: http://animaldiversity.ummz.umich.edu

These teeth are the most primitive mammal teeth, exhibited in extant possums (Didelphis virginiana).


The whole tooth itself is called a "trigon".



Information provided by: http://animaldiversity.ummz.umich.edu

A little treat here! I love this song!

Lyrics:

Glass of milk
Standing in between extinction in the cold
and explosive radiating growth
So the warm blood flows
Through the large four-chambered heart
Maintaining the very high metabolism rate they have

Mammal, mammal
Their names are called
They raise a paw
The bat, the cat
Dolphin and dog
Koala bear and hog

One of us might lose his hair
But you're reminded that it once was there
From the embryonic whale to the monkey with no tail
So the warm blood flows
with the red blood cells lacking nuclei
Through the large four-chambered heart
Maintaining the very high metabolism rate they have

Mammal, mammal
Their names are called
They raise a paw
The bat, the cat
Dolphin and dog
Koala bear and hog

Placental the sister of her brother Marsupial
Their cousin called Monotreme
Dead uncle Allotheria

Mammal, mammal
Their names are called
They raise a paw
The bat, the cat
Dolphin and dog
Koala bear and hog
The fox, the ox
Giraffe and shrew
Echidna, caribou

-They Might Be Giants

These are the only mammals capable of true, powered flight. Bats have a very long ulna and phalanges, yet the radius, humerus, metacarpals and carpals are notably reduced. The small spur on the heels where the "uropatagium", the rear skin fold is supported is called the "calcar". The Phalanges support most of the wing tissue.

Fossorial mammals are adapted for life underground! They often have robust forelimbs for digging.

One example is the mole:






Note the slender scapula designed for squeezing through small spaces and tunnels.

An example of a semi-fossorial mammal is the armadillo (Dasypus novemcinctus). In this model, the shell has been removed, and the lower jaw is missing.

Amphibious mammals can exist happily in both aquatic and terrestrial environments. They have adaptations for both. Particularly the platypus (Ornithorhynchus anatinus), since it is more specialized and has been evolving for this lifestyle longer than other aquatic mammals.










The platypus is one of the world's few venomous mammals: the spur on the back heels of the male is the delivery device.


Another example of an amphibious mammal is the muskrat (Ondatra zibethicus).

Forelimbs are modified into flippers, and hind limbs are reduced, or absent altogether.

Firstly, the manatee (Trichechus manatus manatus). Note that the hind limbs are fully absent. The metacarpals are missing on this model, but should be present.




(Manatee is the middle specimen)

Second, the porpoise: Notice the severely reduced hind limbs.







Finally, the seal:

Arboreal mammals show two types of locomotion:

First is "brachiation"; swinging arm over arm in the branches. The forearms are elongated, and often the thumb (pollex) is reduced. An example of this is the young chimpanzee (Pan troglodytes)model. The TA explained the model's lack of a head: 20-some years ago, someome in the lab decided to walk out with it.







The second method of locomotion for arboreal mammals is use of the claws to climb rough surfaces. Examples of animals that use this method are the squirrel monkey (Saimiri sciureus).