Dental Formulae Examples
| MAMMAL | DENTAL FORMULA | COMMENT |
|---|---|---|
| Non placental | . | Non-placental mammals such as marsupials can have more teeth than placentals. For example, the opossum (below) |
| Kangaroo | ||
| Musky Rat-kangaroo | ||
| All of Potoroidae except Musky Rat-kangaroo | The marsupial family Potoroidae includes the bettongs, potoroos, and two of the rat-kangaroos. All are rabbit-sized, brown, jumping marsupials and resemble a large rodent or a very small wallaby. |
|
| Opossum | ||
| Placental | . | Some examples of dental formulae for placental mammals |
| Armadillo | ||
| Aye-aye | A Prosimian. The Aye-aye's deciduous dental formula (dI:dC:dM) is | |
| Badger | ||
| Big brown bat | ||
| Red Bat, Hoary Bat, Seminole Bat, Mexican Free-tailed Bat | ||
| Cat (deciduous) | ||
| Cat | The last upper premolar and first lower molar of the cat, since it is a carnivore, are called carnassials and are used to slice meat and skin. This means that the carnassials are always the fourth upper premolar and the first lower molar | |
| Cow | The cow has no upper incisors or canines, the rostral portion of the upper jaw forming a dental pad. The lower canine is incisiform, giving the appearance of a 4th incisor. |
|
| Dog (deciduous) | ||
| Dog (permanent) | ||
| Fox (red) | ||
| Eulemur | Prosimian genus to which the large Malagasy or 'true' lemurs belong. Ruffed lemurs (genus Varecia), Dwarf lemurs (genus Mirza), and Mouse lemurs (genus Microcebus) also have this dental formula, but the mouse lemurs have a dental comb | |
| Euoticus | Prosimian genus to which the needle-clawed bushbabies (or galagos) belong. Specialised morphology for gummivory includes procumbent dental comb and caniniform upper anterior premolars. | |
| Guinea pig | ||
| Hedgehog | ||
| Horse (deciduous) | ||
| Horse (permanent) | Permanent dentition varies from 36-42, depending on the presence or absence of canines and the number of premolars. The first premolar (wolf tooth) may be absent or rudimentary, and is mostly present only in the upper (maxillary) jaw. The canines are small and spade-shaped, and usually present only in males. Canines appear in 20-25% of females and are usually smaller than in males. | |
| Human (deciduous teeth) | ||
| Human (permanent teeth) | This pattern is shared with Apes and Old World monkeys (excluding Prosimii), and is sometimes known as the cercopithecoid dental formula. | |
| Indri | See comment | A prosimian. Dental formula disputed. Either or . Proponents of both formulae agree there are 30 teeth and that there are only four teeth in the dental comb. |
| Lepilemur | A prosimian. The upper incisors are lost in the adult, but are present in the deciduous dentition. | |
| Lion | ||
| Mole | ||
| Mouse (House) | Plains Pocket Mouse (Perognathus flavescens) have dental formula of | |
| Rat | ||
| New World anthropoids | See comment | All New World anthropoids have a dentition formula of or |
| Opossum | ||
| Pig (deciduous) | ||
| Pig | ||
| Rabbit | ||
| Raccoon | ||
| Sheep (deciduous) | ||
| Sheep (permanent) | ||
| Shrew | ||
| Sifakas | See comment | Prosimians. Dental formula disputed. Either or . Possess dental comb comprising four teeth. |
| Slender loris Slow loris |
Prosimians. Lower incisors and canines form a dental comb; upper anterior dentition is peg-like and short. | |
| Squirrel | ||
| Tarsiers | Prosimians. | |
| Vole (field) | ||
| Weasel |
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