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Dental formula for mammals

Discussion in 'Skulls and Skeletons' started by Muskrat24, Apr 5, 2010.

  1. Dental formula: A dental formula is a standard number of teeth that a certain mammal has. This formula can be very helpfull when it comes to identifiying a skull or if you have a bottom jaw of an animal and have no clue what it is. All this information comes from The Wild Mammals of Missouri. First of all reading a dental formula.
    I 0/0 C 0/0 P 0/0 M 0/0 =
    I: incisors
    C: canines
    P: pre molars
    M: molars
    The top number represents one top half of the skull and the bottom number represents one bottom half of the jaw.
    Pouched Mammals:

    Virginia Oposum (didelphis virginiana)
    I 5/4 C 1/1 P 3/3 M 4/4=50

    INSECT EATING MAMMALS

    Masked shrew (Sorex cinereus))
    I 3/1 C 1/1 P 3/1 M 3/3= 32

    South Easern Shrew (Sorex longirostris)
    I 3/1 C 1/1 P 3/1 M 3/3= 32

    Short-tailed Shrew (Blarina brevicauda)
    I 3/1 C 1/1 P 3/1 M 3/3=32 or I 4/1 C 1/0 P 2/1 M 3/3=32

    Least Shrew (Cryptotis parva)
    I 3/1 C 1/1 P 2/1 M 3/3=30 or I 3/2 C 1/0 P 2/1 M 3/3=30

    Eastern Mole (Scalopus aquaticus)
    I 3/2 C 1/0 P 3/3 M 3/3=36
     
  2. HARE SHAPED MAMMALS

    Eastern Cottontail Rabbit (Sylviagus floridanus)
    I 2/1 C 0/0 P 3/2 M 3/3=28

    Swamp Rabbit (Sylvilagus aquaticus)
    I 2/1 C 0/0 P 3/2 M 3/3= 28

    White-tailed Jack Rabbit (Lepus townsendii) and Black-tailed Jack Rabbit (Lepus californicus)
    I 2/1 C 0/0 P 3/2 M 3/3= 28

    GNAWING MAMMALS

    Eastern Chipmunk (Tamias striatus)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Woodchuck (Marmota monax)
    I 1/1 C 0/0 P 2/1 M 3/3=22

    Thirteen-lined Ground Squirrel (Spermophilus tridecemlineatus)
    I 1/1 C 0/0 P 2/1 M 3/3=22

    Franklin's Ground Squirrel (Spermophilus franklinii)
    I 1/1 C 0/0 P 2/1 M 3/3=22

    Eastern Gray Squirrel (Sciurus carolinensis)
    I 1/1 C 0/0 P 2/1 M 3/3=22

    Fox Squirrel (Sciurus niger)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Red Squirrel (Tamiasciurus hudsonicus)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Southern Flying Squirrel (Glaucomys volans)
    I 1/1 C 0/0 P 2/1 M 3/3=22

    Plains Pocket Gopher (Geomys bursarius)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Plains Pocket Mouse (Perognathus flavescens)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Beaver (Castor canadensis)
    I 1/1 C 0/0 P 1/1 M 3/3=20

    Marsh Rice Rat (Oryzomys palustris)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Western Harvest Mouse (Reithrodontomys megalotis)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Fulvous Harvest Mouse (Reithrodontomys fulvescens)[/b
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Deer Mouse (Peromyscus maniculatus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    White-footed Mouse (Peromyscus leucopus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Golden Mouse (Ochrotomys nutalli)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Eastern Wood Rat (Neotoma floridana)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Meadow Vole (Microtus pennsylvanicus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Woodland Vole (Microtus pinetorum)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Muskrat (Ondatra zibethicus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Southern Bog Lemming (Synaptomys cooperi)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Black Rat (Rattus rattus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Norway Rat (Rattus norvegicus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    House Mouse (Mus musculus)
    I 1/1 C 0/0 P 0/0 M 3/3=16

    Meadow Jumping Mouse (Zapus hudsonius)
    I 1/1 C 0/0 P 1/0 M 3/3=18
     

  3. FLESH-EATING MAMMALS
    Coyote (Canis latrans)
    I 3/3 C 1/1 P 4/4 M 2/3=42

    Red Wolf (Canis rufus)
    I 3/3 C 1/1 P 4/4 M 2/3=42

    Red Fox (Vulpes vulpes)
    I 3/3 C 1/1 P 4/4 M 2/3=42

    Gray Fox (Urocyon cinereoargenteus)
    I 3/3 C 1/1 P 4/4 M 2/3=42

    Black Bear (Ursus americanus)
    I 3/3 C 1/1 P 4/4 M 2/3=42

    Raccoon (Procyon Lotor)
    I 3/3 C 1/1 P 4/4 M 2/2=40

    Least Weasel (Mustela nivalis)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    Long-tailed Weasel (Mustela frenata)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    Mink (Mustela vison)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    Badger (Taxidea taxus)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    Eastern Spotted Skunk (Spilogale putorius)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    Striped Skunk (Mephitis mephitis)
    I 3/3 C 1/1 P 3/3 M 1/2=34

    River Otter (Lutra canadensis)
    I 3/3 C 1/1 P 4/3 M 1/2=36 OR
    I 3/3 C 1/1 P 4/4 M 1/2=38

    Mountain Lion (Felis concolor)
    I 3/3 C 1/1 P 3/2 M 1/1=30

    Bobcat (Lynx rufus)
    I 3/3 C 1/1 P 2/2 M 1/1=28