5" Fossil Primitive Whale (Pappocetus) Premolar in Rock - Morocco

Pappocetus is a genus of extinct protocetid cetacean. Protocetids are considered to be one of the earliest examples of whale development during the time they were transitioning from land to sea. Fossil records indicate that they are Middle Eocene in age, existing after Pakicetus (earliest known whale) and prior to Zygorhiza (basilosaurid). These protocetids had become much more whale-like in appearance, featuring a more streamlined body with paddle-like forelegs, and hind-limbs that were greatly reduced in size. Their robust teeth and root structures suggest that they were aquatic carnivores, relying on smell and vision as their most important senses for hunting prey. It's unlikely that by this point they had developed echolocation systems used by modern whales.