| Rhigerpeton Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Order: | † Temnospondyli |
| Suborder: | † Stereospondyli |
| Family: | † Lapillopsidae |
| Genus: | † Rhigerpeton |
| Species: | †R. isbelli |
| Binomial name | |
| †Rhigerpeton isbelli Gee et. al., 2023 | |
Rhigerpeton is an extinct genus of lapillopsid temnospondyl that lived in Antarctica during the Early Triassic. It contains a single species, R. isbelli. [1]
Antarctic flora are a distinct community of vascular plants which evolved millions of years ago on the supercontinent of Gondwana. Presently, species of Antarctica flora reside on several now separated areas of the Southern Hemisphere, including southern South America, southernmost Africa, New Zealand, Australia, and New Caledonia. Joseph Dalton Hooker was the first to notice similarities in the flora and speculated that Antarctica had served as either a source or a transitional point, and that land masses now separated might formerly have been adjacent.
The geology of Antarctica covers the geological development of the continent through the Archean, Proterozoic and Phanerozoic eons.
The Stereospondyli are a group of extinct temnospondyl amphibians that existed primarily during the Mesozoic period. They are known from all seven continents and were common components of many Triassic ecosystems, likely filling a similar ecological niche to modern crocodilians prior to the diversification of pseudosuchian archosaurs.
Antarctica is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of 14,200,000 km2 (5,500,000 sq mi). Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of 1.9 km (1.2 mi).
Gondwana was a large landmass, sometimes referred to as a supercontinent. The remnants of Gondwana make up around two-thirds of today's continental area, including South America, Africa, Antarctica, Australia, Zealandia, Arabia, and the Indian Subcontinent.
Letnitsa Glacier is a 0.9 nautical miles long glacier on Smith Island in the South Shetland Islands, Antarctica draining the southeast slopes of Imeon Range east of Organa Peak and south of Riggs Peak. It is situated southwest of Gramada Glacier and northeast of Kremena Ice Piedmont, and flows southeastward into Hisarya Cove, Osmar Strait. Bulgarian early mapping in 2009. The glacier is named after the town of Letnitsa in northern Bulgaria.
Gramada Glacier is a 1.6 nautical miles long glacier on Smith Island in the South Shetland Islands, Antarctica draining the southeast slopes of Imeon Range east of Riggs Peak, southeast of Madan Saddle and south of Neofit Peak. It is situated southwest of Armira Glacier and northeast of Letnitsa Glacier, and flows southeastward into Brashlyan Cove on Osmar Strait. The glacier is named after the town of Gramada in northwestern Bulgaria.
Armira Glacier is a 1.6 nautical miles long glacier on Smith Island in the South Shetland Islands, Antarctica draining the southeast slopes of Imeon Range southeast of Slaveykov Peak and east of Neofit Peak. It is situated southwest of Dragoman Glacier and northeast of Gramada Glacier, and flows southeastward into Yarebitsa Cove on Osmar Strait. Bulgarian early mapping in 2009. The glacier is named after Armira River in southeastern Bulgaria.
Saparevo Glacier is a 1.8 km long and 2 km wide glacier draining the northwest slopes of Imeon Range on Smith Island, South Shetland Islands, Antarctica. It is situated northeast of Kongur Glacier, and flows north-northeast of Mount Christi and southwest of Matochina Peak into Vedena Cove in Drake Passage. Bulgarian early mapping in 2009. The glacier is named after the settlement of Saparevo in Southwestern Bulgaria.
Dalgopol Glacier is a 3.4 kilometres (2.1 mi) long glacier draining the northwest slopes of Imeon Range on Smith Island in the South Shetland Islands, Antarctica. It is situated northeast of Vetrino Glacier and southwest of Kongur Glacier, and flows north of Mount Pisgah and northwest of Mezek Peak into Drake Passage. Bulgarian early mapping in 2009. The glacier is named after the town of Dalgopol in northeastern Bulgaria.
Vetrino Glacier is a 3.2 km long glacier on the northwest side of Imeon Range on Smith Island in the South Shetland Islands, Antarctica. It is situated northeast of Yablanitsa Glacier, southwest of Dalgopol Glacier and northwest of Ovech Glacier, drains the northwest slopes of Imeon Range north of Drinov Peak, northwest of Kostenets Saddle and west of Mount Pisgah, and flows northwestwards into Drake Passage both northeast and south of Gregory Point. The glacier is named after the town of Vetrino in northeastern Bulgaria.
Yablanitsa Glacier is a 1.8 km long glacier on Smith Island in the South Shetland Islands, Antarctica. It is situated north-northeast of Chuprene Glacier, southwest of Vetrino Glacier and northwest of Ovech Glacier, and flows west of Drinov Peak into Cabut Cove. The feature is named after the town of Yablanitsa in northern Bulgaria.
Chuprene Glacier is a 2.1 nautical miles long glacier draining the northwest slopes of Imeon Range on Smith Island in the South Shetland Islands, Antarctica. It is situated northeast of Bistra Glacier, southwest of Yablanitsa Glacier and northwest of Krivodol Glacier, Pashuk Glacier and Rupite Glacier, and flows southwest of Drinov Peak and Popovo Saddle, and west of Slatina Peak and Varshets Saddle southwestward along the northwest slopes of Antim Peak and Evlogi Peak into Drake Passage south of Villagra Point and north of Garmen Point. Bulgarian early mapping in 2009. The glacier is named after the settlement of Chuprene in northwestern Bulgaria.
Lapillopsidae is an extinct family of temnospondyls.
Lapillopsis is an extinct genus of stereospondyl temnospondyl within the family Lapillopsidae. Fossils belonging to the genus have been found in the Arcadia Formation of Queensland, Australia.
Lucchitta Glacier is a glacier about 20 nautical miles (37 km) long flowing south from the Hudson Mountains of Antarctica into Pine Island Bay. It was named by the Advisory Committee on Antarctic Names after geologist Baerbel K. Lucchitta of the United States Geological Survey, Flagstaff, Arizona, a specialist in the use of satellite imagery for geological and glaciological studies from the early 1980s to the early 2000s (decade), and one of the pioneers in the use of imagery for glacier velocity measurements in Antarctica.
Bender Glacier is a glacier that flows from Mount Atkinson and Mount Craddock southwards between Chaplin Peak and Krusha Peak, and joins Nimitz Glacier just south of Gilbert Spur in the southern Sentinel Range, Ellsworth Mountains in Antarctica. Receiving ice influx from its left tributaries Severinghaus Glacier, Brook Glacier and Bolgrad Glacier.
The East Antarctic Shield or Craton is a cratonic rock body that covers 10.2 million square kilometers or roughly 73% of the continent of Antarctica. The shield is almost entirely buried by the East Antarctic Ice Sheet that has an average thickness of 2200 meters but reaches up to 4700 meters in some locations. East Antarctica is separated from West Antarctica by the 100–300 kilometer wide Transantarctic Mountains, which span nearly 3,500 kilometers from the Weddell Sea to the Ross Sea. The East Antarctic Shield is then divided into an extensive central craton that occupies most of the continental interior and various other marginal cratons that are exposed along the coast.
There may have been women in Antarctica, exploring the regions around Antarctica for many centuries. The most celebrated "first" for women was in 1935 when Caroline Mikkelsen became the first woman to set foot on one of Antarctica's islands. Early male explorers, such as Richard Byrd, named areas of Antarctica after wives and female heads of state. As Antarctica moved from a place of exploration and conquest to a scientific frontier, women worked to be included in the sciences. The first countries to have female scientists working in Antarctica were the Soviet Union, South Africa and Argentina.
Antarctica Day is an international holiday recognizing the anniversary of the signing of the Antarctic Treaty in 1959. It is celebrated on December 1 each year. Along with Midwinter Day, it is one of Antarctica's two principal holidays.
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