Welcome to Archaeocete.org! Archaeocete.org is dedicated to all things having to do with the Archaeoceti. If you are interested in archaeocetes, this is the place for you. If you don't have a clue what they are, then read on! The mammalian order Cetacea (whales, dolphins, and porpoises) contains three suborders, two living, and one extinct. The living suborders, Mysticeti (baleen whales) and Odontoceti (toothed whales) comprise the Neoceti, or new whales. The third suborder, Archaeoceti, are the ancient whales. Archaeocetes lived during the Eocene, from about 50 million years ago to about 37 million years ago. The earliest archaeocetes were terrestrial to semi-aquatic animals which probably fed on aquatic prey. Later archaeocetes were probably sea lion like in habit, feeding and spending most of their time in the sea, while returning to land to breed and/or give birth. The latest archaeocetes were the first fully aquatic cetaceans, and are thought to have given rise to the Neoceti. Keep looking here for more information as this site grows and expands.