Hypsamasia
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Hypsamasia
''Hypsamasia'' is an extinct embrithopod mammal that lived during the middle Eocene. Dental remains of this herbivore have been found in the Kartal Formation near the village Saribeylar (, paleocoordinates ) north of Ankara in what is today Anatolia. ''Hypsamasia seni'' was named in reference to its high crowned cheek teeth (Greek: ''hypsos'', "height"), the type locality (the Roman town and province Amasya), and after Dr Sevket Sen for his important contribution to the paleontology and geology of western Asia. ''Hypsamasia'' differs from ''Palaeoamasia ''Palaeoamasia'' is an extinct herbivorous paenungulate mammal of the embrithopod order, making it distantly related to elephants, sirenians, and hyraxes. ''Palaeoamasia'' fossils have been found in Turkish deposits of the Çeltek Formation, d ...'' in its larger size and the highly crowned teeth. Other, unnamed embrithopods have been found in the Kartal Formation. Embrithopods are best known from northern Africa, but ...
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Embrithopoda
Embrithopoda ("heavy-footed") is an order of extinct mammals known from Asia, Africa and Eastern Europe. Most of the embrithopod genera are known exclusively from jaws and teeth dated from the late Paleocene to the late Eocene; however, the order is best known from its terminal member, the elephantine ''Arsinoitherium''. Description While embrithopods bore a superficial resemblance to rhinoceroses, their horns had bony cores covered in keratinized skin. Not all embrithopods possessed horns, either. Despite their appearance, they have been regarded as related to elephants, not perissodactyls. As tethytheres, the Embrithopoda have been believed to be part of the clade Afrotheria. However, a study of the basal arsinoitheriid, ''Palaeoamasia'', suggests that embrithopods are not tethytheres or even paenungulates, and that they need to be better sampled in an analysis of eutherian relationships to clarify if they are even afrotherians.[Erdal et al.'s inclusion of Embrithopoda in ...
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Palaeoamasia
''Palaeoamasia'' is an extinct herbivorous paenungulate mammal of the embrithopod order, making it distantly related to elephants, sirenians, and hyraxes. ''Palaeoamasia'' fossils have been found in Turkish deposits of the Çeltek Formation, dating to the Ypresian. It has unique bilophodont upper molars, an embrithopod synapomorphy. Discovery ''Palaeoamasia kansui'' (Ozansoy, 1966), the type species, was first discovered in Anatolia, Turkey in 1966. Since then, ''Palaeoamasia'' fossils have only been found In Anatolia. The fossil record of ''Palaeoamasia'' is scarce, although a new species of ''Palaeoamasia'' was discovered in 2014. The ''Palaeoamasia'' sp. nov. fossil is the youngest found to date, extending the period of survival of the genus to the early Oligocene. The fossils recorded consist mostly of tooth and jaw fragments. The tooth fossils show that ''Palaeoamasia'' has two prominent transverse crests on upper molars, signifying the embrithopod synapomorphy of biloph ...
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Eocene
The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope Carbon-13, 13C in the atmosphere was exceptionally low in comparison with the more common isotope Carbon-12, 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Popigai impact structure, Siberia and in what is now ...
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Kartal Formation
Kartal is a district of Istanbul, Turkey, located on the Asian side of the city, on the coast of the Marmara Sea between Maltepe and Pendik. Despite being far from the city centre, Kartal is heavily populated (total population of 541,209) (2008 census). The total land area is 147,000 m2, which includes some countryside areas inland. The district's neighbours are Maltepe to the west, Sultanbeyli and Sancaktepe to the north and Pendik to the east. Inland from the coast, the land rises sharply up to the hills Yakacık and Aydos, the latter of which is the highest point in Istanbul. History Kartal ('eagle' in Turkish, by folk etymology) was a fishing village on the shore of the Marmara Sea during the Byzantine Empire, called Kartalimen or Kartalimin in Greek, and was founded at the beginning of the 6th century. In the 11th century, the town was conquered by the ruler of the Seljuks, Suleyman Shah. In 1329, Kartal became part of the Ottoman Empire, the Byzantines re-took the ci ...
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Ankara
Ankara ( , ; ), historically known as Ancyra and Angora, is the capital of Turkey. Located in the central part of Anatolia, the city has a population of 5.1 million in its urban center and over 5.7 million in Ankara Province, making it Turkey's second-largest city after Istanbul. Serving as the capital of the ancient Celtic state of Galatia (280–64 BC), and later of the Roman province with the same name (25 BC–7th century), the city is very old, with various Hattian, Hittite, Lydian, Phrygian, Galatian, Greek, Persian, Roman, Byzantine, and Ottoman archeological sites. The Ottomans made the city the capital first of the Anatolia Eyalet (1393 – late 15th century) and then the Angora Vilayet (1867–1922). The historical center of Ankara is a rocky hill rising over the left bank of the Ankara River, a tributary of the Sakarya River. The hill remains crowned by the ruins of Ankara Castle. Although few of its outworks have survived, there are ...
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Anatolia
Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The region is bounded by the Turkish Straits to the northwest, the Black Sea to the north, the Armenian Highlands to the east, the Mediterranean Sea to the south, and the Aegean Sea to the west. The Sea of Marmara forms a connection between the Black and Aegean seas through the Bosporus and Dardanelles straits and separates Anatolia from Thrace on the Balkan peninsula of Southeast Europe. The eastern border of Anatolia has been held to be a line between the Gulf of Alexandretta and the Black Sea, bounded by the Armenian Highlands to the east and Mesopotamia to the southeast. By this definition Anatolia comprises approximately the western two-thirds of the Asian part of Turkey. Today, Anatolia is sometimes considered to be synonymous with Asian ...
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Amasya
Amasya () is a city in northern Turkey and is the capital of Amasya Province, in the Black Sea Region. It was called Amaseia or Amasia in antiquity."Amasya" in ''The New Encyclopædia Britannica''. Chicago: Encyclopædia Britannica Inc., 15th edn., 1992, Vol. 1, p. 313. Amasya stands in the mountains above the Black Sea coast, set apart from the rest of Anatolia in a narrow valley along the banks of the Yeşilırmak River. Although near the Black Sea, this area is high above the coast and has an inland climate, well-suited to growing apples, for which Amasya province, one of the provinces in north-central Anatolia Turkey, is famed. It was the home of the geographer Strabo and the birthplace of the 15th century Armenian scholar and physician Amirdovlat Amasiatsi. Located in a narrow cleft of the Yeşilırmak (Iris) river, it has a history of 7,500 years with many traces still evident today. In antiquity, Amaseia was a fortified city high on the cliffs above the river. It has a l ...
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Fossil Taxa Described In 1998
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absol ...
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Prehistoric Placental Genera
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ...
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Eocene Genus Extinctions
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ...
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