Protocetidae
| Protocetidae Temporal range: Early Eocene to Late Eocene | |
|---|---|
| Maiacetus | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Artiodactyla | 
| Suborder: | Whippomorpha | 
| Infraorder: | Cetacea | 
| Family: | †Protocetidae Stromer 1908 | 
| Subfamilies | |
| 3, See text | |
Protocetidae, the protocetids, form a paraphyletic, diverse and heterogeneous group of extinct cetaceans known from Asia, Europe, Africa, South America, and North America.