Mammal Skulls Flashcards
Didelphis virginiana
Narrow braincase
50 teeth
Prominent sagittal crest
Dasypus novemcintus
Elongated rostrum
Peg teeth in the cheek
Blarina bervicauda
Incisors pointed forward
No zygomatic arches
Scalopus aquaticus
Zygomatic arches
White teeth
Incisors point down
Eptesicus fuscus
U shaped notch in skull, separation incisors from canines
Glaucomys volans
U shaped notch in inter orbital
5 cheek teeth, small peg first one
Rounded postorbital process
Tamias striatus
similar skull to SFS
4 cheek teeth
No notch
Marmota monax
Flat skull
Straight postorbital process
Back postorbital is perpendicular
Sciurus niger
Round skull
Backward postorbital
4 cheek teeth
Sciurus carolinensis
5 cheek teeth
small skull
1st premolar is small, peglike
Castor canadensis
Thick zygomatic arches
Narrow ear holes
Peromyscus leucopus
Skull has no temporal ridges
Small
Sigmodon hispidus
Temporal ridges
S teeth pattern
Neotoma floridana
Indistinct temporal ridges
E shapes teeth pattern
Ondatra zibethicus
Molars have sharp, jagged edges
Edge of orbit is perpindicular to skull
Myocastor coypus
Large infraorbital foramen (hole between eyes)
Elongate paraoccipital process projecting down
Sylvilagus floridanus
2 pairs upper incisors
Fenestrated maxillry
Procyon lotor
No sagittal crest or temporal ridges
Cheek teeth have rounded cusps
Canis latrans
Carnassial premolars
Broad molars
Indistinct temporal ridges
Well-developed sagittal crest
Vulpes vulpes
Small
Narrow rostrum
Temporal ridges form V shape
Urocyon cinereoargenteus
Temporal ridges from U shape
Ursus americanus
Broad relative to length
Broad zygomatic arches
Large broad canines
Pronounces sagittal and occipital crests
Rounded molariform teeth
Neogale vision
Last molar is dumbbell-shaped and elongated across tooth
Palate extends past back molar
Lontra canadensis
Truncate rostrum
Teeth have sharp cusps
