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Peltocephalus Maturin
''Peltocephalus maturin'' is an extinct species of podocnemidid river turtle closely related to the big-headed Amazon River turtle (''Peltocephalus dumerilianus'') that lived during the Late Pleistocene and Early Holocene in what is now Brazil. ''P. maturin'' is known from a singular lower jaw of enormous size, with estimates suggesting its carapace may have reached lengths of around . This would make it one of the largest freshwater turtles in history, comparable in size to the Paleocene podocnemidid '' Carbonemys'' and only exceeded by the Miocene podocnemidid '' Stupendemys''. Like its closest relative, it was likely an omnivore, the narrow cutting surface of its lower jaw unsuited for strict herbivory or durophagy. History and naming ''Peltocephalus maturin'' was described in 2024 on the basis of specimen MERO.PV.H 007, a partial lower jaw discovered by gold miners within the Taquaras Quarry of Rondônia, Brazil. Since the Rio Madeira Formation is the only geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Pleistocene
The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently defined as the time between c. 129,000 and c. 11,700 years ago. The Late Pleistocene equates to the proposed Tarantian Age of the geologic time scale, preceded by the officially ratified Chibanian (formerly known as Middle Pleistocene) and succeeded by the officially ratified Greenlandian. The estimated beginning of the Tarantian is the start of the Eemian interglacial period (Marine Isotope Stage 5). It is held to end with the termination of the Younger Dryas, some 10th millennium BC, 11,700 years ago when the Holocene Epoch began. The term Upper Pleistocene is currently in use as a provisional or "quasi-formal" designation by the International Union of Geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Surprise (novel)
''HMS Surprise'' is the third historical novel in the Aubrey–Maturin series by Patrick O'Brian, first published in 1973. The series follows the partnership of Captain Jack Aubrey and the naval surgeon Stephen Maturin during the wars against Napoleon's France. Maturin is tortured gathering intelligence. On HMS ''Surprise'', Aubrey and Maturin make a long voyage to bring an ambassador to Southeast Asia, rounding the southern tip of Africa. Some reviewers found the novel with "superb depictions of life", yet too full of nautical detail, while others found that detail part of the author's erudition and not in the way of the plot. The author showed "capacity for creating another completely believable world", while another reviewer said the novel is "stretching its genre aval adventurebut never escaping it." Plot summary A convoy including Aubrey seizes the ships carrying the gold deemed necessary by Spain to agree to join the war on the side of France. On the quibble that Spain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrau Turtle
The Arrau turtle (''Podocnemis expansa''), also known as the South American river turtle, giant South American turtle, giant Amazon River turtle, Arrau sideneck turtle, Amazon River turtle or simply the Arrau, is the largest of the side-neck turtles (Pleurodira) and the largest freshwater turtle in Latin America. The species primarily feeds on plant material and typically nests in large groups on beaches. Due to hunting of adults, collecting of their eggs, pollution, habitat loss, and dams, the Arrau turtle is seriously threatened. Range and habitat Arrau turtles are found in the Amazon, Orinoco and Essequibo basins in Brazil, Bolivia, Peru, Ecuador, Colombia, Venezuela and Guyana. On occasion, typically after floods, individuals turn up in Trinidad. They are found in deep rivers, ponds, freshwater lagoons and flooded forest in white-, black- and clear-water. Appearance Arrau turtles can reach up to in weight and the carapace length is up to . Most individuals are conside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asian Narrow-headed Softshell Turtle
The Asian narrow-headed softshell turtle (''Chitra chitra'') is a large species of softshell turtle in the family Trionychidae. The species is endemic to Southeast Asia. Common names ''Chitra chitra'' is also known commonly as Nutaphand's narrowhead softshell. It is a name given in honor of Wirot Nutaphand, a Thai herpetologist who did taxonomy. Description ''C. chitra'' can reach a straight carapace length of 4.9 ft (1.5 m). Geographic range ''C. chitra'' is found in Indonesia, Malaysia, and Thailand. Habitat ''C. chitra'' inhabits freshwater rivers and their tributaries. Reproduction ''C. chitra'' is oviparous. Nutaphand (1986) reported that a large female laid over 100 eggs. Subspecies Two subspecies are recognized as being valid, including the nominotypical subspecies.. www.reptile-database.org. *''Chitra chitra chitra'' – Malaysia, Thailand *''Chitra chitra javanensis'' – Java, Sumatra In captivity The largest ''C. chitra'' in the world was a fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today, although a third epoch, the Anthropocene, has been proposed but is not yet officially recognised by the ICS). The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four successive formations or "orders" ( it, quattro ordini). The term "quaternary" was introduced by Jules Desnoye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archelon
''Archelon'' is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring from head to tail and in body mass. It is known only from the Dakota Pierre Shale and has one species, ''A. ischyros''. In the past, the genus also contained ''A. marshii'' and ''A. copei'', though these have been reassigned to '' Protostega'' and ''Microstega'', respectively. The genus was named in 1895 by American paleontologist George Reber Wieland based on a skeleton from South Dakota, who placed it into the extinct family Protostegidae. The leatherback sea turtle (''Dermochelys coriacea'') was once thought to be its closest living relative, but now, Protostegidae is thought to be a completely separate lineage from any living sea turtle. ''Archelon'' had a leathery carapace instead of the hard shell seen in sea turtles. The carapace may have featured a row of small ridges, each peaking at in height. It had an esp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big-headed Amazon River Turtle
The big-headed Amazon River turtle (''Peltocephalus dumerilianus''),"''Peltocephalus dumerilianus'' " The Reptile Database. also known as the big-headed sideneck, is a species of turtle in the Family (biology), family Podocnemididae. The species is monotypic within the genus ''Peltocephalus''. Etymology The Specific name (zoology), specific name, ''dumerilianus'', is in honor of French people, French Herpetology, herpetologist André Marie Constant Duméril.species:Bo Beolens, Beolens, Bo; species:Michael Watkins, Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (''Peltocephalus dumeriliana'', ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronoid Process Of The Mandible
In human anatomy, the mandible's coronoid process (from Greek ''korōnē'', denoting something hooked) is a thin, triangular eminence, which is flattened from side to side and varies in shape and size. Its anterior border is convex and is continuous below with the anterior border of the ramus. Its ''posterior border'' is concave and forms the anterior boundary of the mandibular notch. The ''lateral surface'' is smooth, and affords insertion to the temporalis and masseter muscles. Its ''medial surface'' gives insertion to the temporalis, and presents a ridge which begins near the apex of the process and runs downward and forward to the inner side of the last molar tooth. Between this ridge and the anterior border is a grooved triangular area, the upper part of which gives attachment to the temporalis, the lower part to some fibers of the buccinator. Clinical significance Fractures of the mandible are common. However, coronoid process fractures are very rare. Isolated fractures of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamphotheca
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food, courtship, and feeding young. The terms ''beak'' and ''rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a beak-like structure), sirens, pufferfish, billfishes and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections – the upper and lower mandibles – are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the word "beak" was, in the past, generally restricted to the sharpened bills of bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erymnochelys
The Madagascan big-headed turtle (''Erymnochelys madagascariensis'') is a turtle native to the waters of permanent slow moving rivers and lakes in western Madagascar. These turtles are critically endangered and have been evaluated to be the most endangered turtle in the world by a 2018 review. Despite their vulnerability to extinction, they are commonly eaten for food and they are still commonly shipped from Madagascar to Asia to help meet the demand of Asia's traditional medicine market. A captive breeding program has also been started to prevent the species from becoming extinct. The Turtle Conservation Fund (TCF) intends to raise US$5.6 million to cover a five-year 'Global Action Plan' which includes captive breeding and reintroduction projects, trade monitoring, new rescue centers, local conservation plans, and educational programs. Description The Madagascan big-headed turtle is one of the most endangered turtles in the world, and is also included in the Turtle Conservation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagascan Big-headed Turtle
The Madagascan big-headed turtle (''Erymnochelys madagascariensis'') is a turtle native to the waters of permanent slow moving rivers and lakes in western Madagascar. These turtles are critically endangered and have been evaluated to be the most endangered turtle in the world by a 2018 review. Despite their vulnerability to extinction, they are commonly eaten for food and they are still commonly shipped from Madagascar to Asia to help meet the demand of Asia's traditional medicine market. A captive breeding program has also been started to prevent the species from becoming extinct. The Turtle Conservation Fund (TCF) intends to raise US$5.6 million to cover a five-year 'Global Action Plan' which includes captive breeding and reintroduction projects, trade monitoring, new rescue centers, local conservation plans, and educational programs. Description The Madagascan big-headed turtle is one of the most endangered turtles in the world, and is also included in the Turtle Conservation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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