Dental Formulas

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Dental formulas are extremely helpful for narrowing possibilities down when you have the skull available. In the following table, the formula for the upper jaw (on one side) is given after the "U" and for the lower jaw after the "L". Totals for the two sides of the upper jaw and the same for the lower jaw are given as is the total number of teeth (all jaws).

I C P M TOTALS TAXON

U 5 1 3 4 26
L 4 1 3 4 24 =50 Didelphis

U 3 1 4 3 22
L 3 1 4 3 22 =44 Parascalops, Scapanus, Condylura

U 3 1 4 2 20
L 3 1 4 3 22 =42 Ursus, Vulpes, Urocyon, Canis, Alopex

U 3 1 4 2 20
L 3 1 4 2 20 = 40 Procyon, Nasua, Bassariscus

U 2 1 3 3 18
L 3 1 3 3 20 = 38 Myotis, Tayassu

U 3 1 4 1 18
L 3 1 4 2 20 = 38 Martes, Gulo

U 3 1 3 3 20
L 2 0 3 3 16 = 36 Scalopus

U 2 1 3 3 18
L 1 1 4 3 18 = 36 Neurotrichus

U 2 1 2 3 16
L 3 1 3 3 20 = 36 Corynorhinus, Lasionycteris

U 3 1 4 1 18
L 3 1 3 2 18 = 36 Lontra

U 2 1 2 3 16
L 2 1 3 3 18 = 34 Mormoops, Macrotus

U 2 1 2 3 16
L 3 1 2 3 18 = 34 Pipistrellus, Euderma

U 3 1 3 1 16
L 3 1 3 2 18 = 34 Mustela, Spilogale, Mephitis, Taxidea

U 0 1 3 3 14
L 3 1 3 3 20 = 34 Cervus, Rangifer

U 3 1 3 3 20
L 1 1 1 3 12 = 32 Sorex, Blarina

U 2 1 1 3 14
L 3 1 2 3 12 = 32 Eptesicus

U 1 1 2 3 14
L 3 1 2 3 18 = 32 Lasiurus, Tadarida brasiliensis

U 3 1 3 1 16
L 2 1 3 2 16 = 32 Enhydra

U 3 1 2 1 14
L 3 1 3 2 18 = 32 Conepatus

U 0 0 3 3 12
L 3 1 3 3 20 = 32 Odocoileus, Alces, Rangifer, Antilocapra, Bison, Ovibos, Oreamnos

U 0 0 { 8 } 16
L 0 0 { 8 } 16 = 32 Dasypus

U 3 1 2 3 18
L 1 1 1 3 12 = 30 Cryptotis

U 2 1 2 3 16
L 0 1 3 3 14 = 30 Choeronycteris

U 2 1 2 2 14
L 2 1 3 2 16 = 30 Leptonycteris

U 1 1 1 3 12
L 3 1 2 3 18 = 30 Nycticeius, Dasypterus

U 1 1 2 3 14
L 2 1 2 3 16 = 30 Nyctinomops macrotis, Nyctinomops femorosacca, Eumops

U 3 1 3 1 16
L 3 1 2 1 14 = 30 Felis, Panthera

U 3 1 1 3 16
L 1 1 1 3 12 = 28 Notiosorex

U 1 1 1 3 12
L 2 1 2 3 16 = 28 Antrozous

U 3 1 2 1 14
L 3 1 2 1 14 = 28 Lynx

U 2 0 3 3 16
L 1 0 2 3 12 = 28 Lepus, Sylvilagus

U 0 0 { 7 } 14
L 0 0 { 7 } 14 = 28 Dasypus

U 2 0 2 3 14
L 1 0 2 3 12 = 26 Ochotona

U 1 0 2 3 12
L 1 0 1 3 10 = 22 Marmota, Ammospermophilus, Otospermophilus, Ictidomys, Xerospermophilus, Cynomys, Tamias, Tamiasciurus, Glaucomys, Sciurus carolinensis, Sciurus griseus, Sciurus aberti, Aplodontia

U 1 0 1 3 10
L 1 0 1 3 10 = 20 Tamias, Tamiasciurus, Sciurus niger, Sciurus apache, Sciurus arizonensis, Thomomys, Geomys, Cratogeomys, Liomys, Perognathus, Chaetodipus, Dipodomys, Microdipodops, Castor, Erethizon

U 1 0 1 3 10
L 1 0 0 3  8 = 18 Zapus

U 1 0 0 3   8
L 1 0 0 3   8 = 16 Reithrodontomys, Onychomys, Baiomys, Peromyscus, Ochrotomys, Podomys, Oryzomys, Sigmodon, Neotoma, Arborimus, Synaptomys, Lemmus, Dicrostonyx, Phenacomys, Myodes, Microtus, Lemniscus, Pitymys, Neofiber, Ondatra, Rattus, Mus, Napaeozapus

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Last Update: 10 Aug 2009