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Steller's sea cow (Hydrodamalis gigas) is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia; its range extended across the North Pacific during the Pleistocene epoch, and likely contracted to such an extreme degree due to the glacial cycle.
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.
The recently extinct Steller's sea cow was the largest known sirenian to have lived, reaching lengths of 10 metres (33 feet) and weights of 5 to 10 tonnes (5.5 to 11.0 short tons). [ 2 ] Sirenians have a large, fusiform body which reduces drag through the water and heavy bones that act as ballast to counteract the buoyancy of their blubber .
It included the Steller's sea cow (Hydrodamalis gigas), the Cuesta sea cow (Hydrodamalis cuestae), and the Takikawa sea cow (Hydrodamalis spissa). Pages in category "Hydrodamalis" The following 4 pages are in this category, out of 4 total.
Steller's sea ape is a purported marine mammal, observed by German zoologist Georg Steller on August 10, 1741, around the Shumagin Islands in Alaska. The animal was described as being around 1.5 m (5 feet) long; with a dog-like head; long drooping whiskers; an elongated but robust body; thick fur coat; no limbs; and tail fins much like a shark.
Phylogenetic analysis suggests that Metaxytherium is a paraphyletic genus with close ties to the Hydrodamalinae, sea cows native to the colder waters of the northern Pacific, including the giant Steller's Sea Cow. Generally, analysis consistently recover hydrodamaline sea cows to be a direct off-shoot of the American lineage.
The Steller's sea cow was a sirenian endemic to Bering Sea between Russia and the United States but had a much larger range during the Pleistocene. First described by Georg Wilhelm Steller in 1741, it was hunted to extinction 27 years later due to its buoyancy making it an easy target for humans hunting it for its meat and fur in addition to an ...
North America A transitional form between steppe bison and modern American bison whose more recent remains date to the early Holocene of Valsequillo basin in Puebla, Mexico. However the direct dating to 5271-5131 BCE is not calibrated and the remains could be older. [50] Other remains in North America have been dated to 8640-8500 BCE. [4 ...