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James Ross Island
James Ross Island is a large island off the southeast side and near the northeastern extremity of the Antarctic Peninsula, from which it is separated by Prince Gustav Channel. Rising to , it is irregularly shaped and extends in a north–south direction. It was charted in October 1903 by the Swedish Antarctic Expedition under Otto Nordenskiöld, who named it for Sir James Clark Ross, the leader of a British expedition to this area in 1842 that discovered and roughly charted a number of points along the eastern side of the island. The style, "James" Ross Island is used to avoid confusion with the more widely known Ross Island in McMurdo Sound. It is one of several islands around the peninsula known as Graham Land, which is closer to South America than any other part of that continent. The island was connected to the Antarctic mainland by an ice shelf until 1995, when the ice shelf collapsed, making the Prince Gustav Channel passable for the first time. Mendel Polar Station, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperobator Antarcticus
''Imperobator'' ("powerful warrior") is a genus of Paraves, paravian theropod that lived during the Maastrichtian stage of the Late Cretaceous period in what is now Antarctica. It contains a single species, ''I. antarcticus'', recovered from the Snow Hill Island Formation. Before its description, it was informally nicknamed the "Naze Dromaeosauridae, dromaeosaur", despite the lack of a "sickle claw" characteristic of the group. In 2019, the describing authors suggested that ''Imperobator'' was about the same size as ''Utahraptor''. Discovery and naming The only described species is known from a single specimen, UCMP 276000, which was first uncovered in 2003 at the early Maastrichtian-aged Cape Lamb Member of the Snow Hill Island Formation on James Ross Island, Antarctica. The Cape Lamb Member has been dated to the early Maastrichtian, about 71 million years ago. UCMP 276000 consists of an incomplete isolated left Pes (anatomy), pes including a portion of the tibia, an incomplete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
