| Term | Definition |
|---|
| Perissodactyls | odd toed ungulate |
| Artiodactyls | even toed ungulate |
| Therapsid | Reptile ancestor to mammals |
| Eutherian | Placental mammal |
| Metatherian | Marsupial |
| Prototherian | Monotreme |
| Therian | Non-monotreme mammal |
| Vibrissae | Whiskers |
| Eccrine gland | sweat gland found on hairless areas |
| Apocrine gland | sweat gland found on hairy areas |
| Heterodonty | Tooth differentiation |
| Diastema | Gap in teeth in grazing animals |
| Class Chondrichthyes | Cartilaginous Fish |
| Subclass Elasmobranchii | Sharks and rays |
| Subclass Holocephali | Chimaeras |
| Clade Osteichthyes | Bony Fish |
| Class Actinopterygii | Ray Finned Fish |
| Class Sarcopterygii | Lobe Finned Fish |
| Homocercal | Even Tail |
| Heterocercal | Shark Tail |
| Diphycercal | Coelacanth Tail |
| Class Myxini | Hagfish |
| Class Cephalaspidomorphi | Lampreys |
Combine with other sets
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