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Pakicetus (meaning 'whale from Pakistan') is an extinct genus of amphibious cetacean of the family Pakicetidae, which was endemic to Indian Subcontinent during the Ypresian (early Eocene) period, about 50 million years ago. [2]
Pakicetidae ("Pakistani whales") is an extinct family of Archaeoceti (early whales) that lived during the Early Eocene in Pakistan. [1] Unlike modern cetaceans, they had well-developed limbs and were capable of walking. The species included were fox to wolf-sized. [2]
The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, the even-toed ungulates. The earliest cetaceans were still hoofed mammals. These early cetaceans became gradually better adapted for swimming than for walking on land, finally evolving into fully marine cetaceans.
Pakicetus, a pakicetid (drawing showing preserved fossil remains). First identified as cetaceans by West 1980, the pakicetids, the most archaic of whales, had long, slender legs and a long, narrow tail, and could reach the size of a modern wolf. They have only been found in sediments from freshwater streams in northwestern India and northern ...
The pygmy right whale shares several characteristics with the right whales, with the exception of having a dorsal fin. Also, pygmy right whales' heads are no more than one quarter the size of their bodies, whereas the right whales' heads are about one-third the size of their bodies. [11] The pygmy right whale is the only extant member of its ...
Raoellids may be the "missing link" sister group to whales . [7] All other Artiodactyla are "cousins" of these two groups. Oxygen-18 values and osteosclerotic bones indicate that the raccoon -like or chevrotain -like Indohyus was habitually aquatic, but 13 C values suggest that it rarely fed in the water.
Species of the infraorder Cetacea A phylogenetic tree showing the relationships among cetacean families. [1]The evolution of cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to have proceeded over a period of at least 15 million years. [2]
Nalacetus Temporal range: Early Eocene, 50 Ma Pre๊ ๊ O S D C P T J K Pg N ↓ Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Infraorder: Cetacea Family: † Pakicetidae Genus: † Nalacetus Thewissen & Hussain 1998 Species: † N. ratimitus Binomial name † Nalacetus ratimitus Thewissen & Hussain 1998 Nalacetus is an ...