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Pakicetidae
Pakicetidae ("Pakistani whales") is an extinct family of early whales that lived during the Early Eocene on the shores of Pakistan.
==Description==
described the first pakicetid, ''Ichthyolestes'', but, though, at the time, they did not recognize it as a cetacean, instead, identifying it as a fish-eating mesonychid. was the first to identify pakicetids as cetaceans and, following the discovery of a braincase, were able to describe the genus ''Pakicetus''. During the following two decades, more research resulted in additional pakicetid cranial material and described postcranial material for the family. Though all parts of pakicetid postcrania are known, no complete skeleton from a single individual has been recovered.
The pakicetid goldmine is the "H-GSP Locality 62" site in the Kala Chitta Hills where fossils from all three genera have been found. However, this site is so littered with bones that identifying bones from a single individual is impossible, and pakicetid skeletons are consequently composites of bones from several individuals.
Pakicetids have been found in or near river deposits in northern Pakistan and northwestern India, a region which was probably arid with only temporal streams when these animals lived there. No pakicetids have been found in marine deposits, and they were apparently terrestrial or freshwater animals. Their long limbs and small hands and feet also indicate they were poor swimmers. Their bones are heavy and compact and were probably used as ballast; they clearly indicate pakicetids were not fast runners notwithstanding their otherwise cursorial morphology. Most likely, pakicetids lived in or near bodies of freshwater and their diet can have included both land animals and aquatic organisms.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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