Chelidae
   HOME
*



picture info

Chelidae
Chelidae is one of three living families of the turtle suborder Pleurodira, and are commonly called Austro-South American side-neck turtles. The family is distributed in Australia, New Guinea, parts of Indonesia, and throughout most of South America. It is a large family of turtles with a significant fossil history dating back to the Cretaceous. The family is entirely Gondwanan in origin, with no members found outside Gondwana, either in the present day or as a fossil.Georges, A. & Thomson, S. (2006). "Evolution and Zoogeography of Australian freshwater turtles". In: Merrick, J. R.; Archer, M.; Hickey, G. & Lee, M. (eds.) ''Evolution and Zoogeography of Australasian Vertebrates''. Sydney: Australia. Description Like all pleurodirous turtles, the chelids withdraw their necks sideways into their shells, differing from cryptodires that fold their necks in the vertical plane. They are all highly aquatic species with webbed feet and the capacity to stay submerged for long periods of t ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Chelodina
''Chelodina'', collectively known as snake-necked turtles, is a large and diverse genus of long-necked chelid turtles with a complicated nomenclatural history. Although in the past, ''Macrochelodina'' and ''Macrodiremys'' have been considered separate genera and prior to that all the same, they are now considered subgenera of the ''Chelodina'', further ''Macrochelodina'' and ''Macrodiremys'' are now known to apply to the same species, hence ''Chelydera'' is used for the northern snake-necked turtles. ''Chelodina'' is an ancient group of chelid turtles native to Australia, New Guinea, the Indonesian Rote Island, and East Timor. The turtles within this subgenus are small to medium-sized with oval shaped carapace. They are side-necked turtles, meaning they tuck their head partially around the side of their body when threatened instead of directly backwards. ''Chelydera'' represents those species that have often been termed the ''Chelodina'' B group or thick necked snake neck tu ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  




Star Wars Resistance
''Star Wars Resistance'' is an American 3D animated comic science fiction television series produced by Lucasfilm Animation. It follows Kazuda Xiono, a New Republic pilot who is recruited by the Resistance to spy on the growing threat of the First Order shortly before and during the events of the sequel trilogy. The series premiered on Disney Channel on October 7, 2018, and the next day it debuted on Disney XD in the United States and worldwide. Twelve shorts debuted on the Disney Channel YouTube channel in December 2018. The second and final season premiered on October 6, 2019 on Disney Channel, Disney XD and DisneyNow. The series ended on January 26, 2020 after forty episodes. ''Resistance'' received generally positive reviews from critics. The series was nominated for the Primetime Emmy Award for Outstanding Children's Program for both of its seasons. It won the Saturn Award for Best Animated Series on Television in 2019 for its debut season. Cast and characters Mai ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Elseya
''Elseya'' is a genus of large side-necked turtles, commonly known as Australian snapping turtles, in the family Chelidae. Species in the genus ''Elseya'' are found in river systems in northern and northeastern Australia and throughout the river systems of New Guinea. Thomson S, Georges A, Limpus C (2006). "A New Species of Freshwater Turtle in the Genus ''Elseya'' (Testudines: Chelidae) from Central Coastal Queensland, Australia". '' Chelon. Conserv. Biol.'' 5 (1): 74–86PDF fulltext They are identified by the presence of alveolar ridges on the triturating surfaces of the mouth and the presence of a complex bridge strut.Thomson S, White A, Georges A (1997). "Re-Evaluation of ''Emydura lavarackorum'': Identification of a Living Fossil". ''Memoirs of the Queensland Museum'' 42 (1): 327-336. The Australian snapping turtles are largely herbivorous, with specialized mouth structures for eating fruits. However, they will eat animal products if opportunity arises. The various species ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Myuchelys
The ''Myuchelys'' is a genus of turtles, the Australian saw-shelled turtles, in the family Chelidae and subfamily Chelodininae. They inhabit the headwaters and tributaries of rivers within their range and this led to the name ''Myuchelys'', which is formed from the Aboriginal word ''myuna'' meaning clear water and the Greek ''chelys'' meaning turtle. They have a short neck and the intergular scute completely separates the gular scutes. They have no alveolar ridge separating them from the snapping turtles of the genus ''Elseya''. Species The genus currently contains these cryptic small species of freshwater turtles, endemic to eastern and northern Australia: * ''Myuchelys bellii'', Namoi River snapping turtle Gray, 1844Gray, J. E. 1844. ''Catalogue of the Tortoises, Crocodiles and Amphibaenians in the Collection of the British Museum''. London. Edward Newman. 80pp. * ''Myuchelys georgesi'', Bellinger River snapping turtle Cann, 1997Cann, J. 1998a. Georges short-neck turtle. ''Mo ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Pleurodira
The Pleurodira are one of the two living suborders of turtles, the other being the Cryptodira. The division between these two suborders represents a very deep evolutionary divide between two very different types of turtles. The physical differences between them, although anatomical and largely internal, are nonetheless significant, and the zoogeographic implications of them are substantial. The Pleurodira are known more commonly as the side-necked turtles and the name Pleurodira quite literally translates to side neck, whereas the Cryptodira are known as hidden-necked turtles. The Pleurodira turtles are currently restricted to freshwater habitats in the Southern Hemisphere, largely to Australia, South America, and Africa. Within the Pleurodira, three living families are represented: Chelidae, also known as the Austro-South American side-necked turtles, the Pelomedusidae, also known as the African mud terrapins, and the Podocnemididae, also known as the American side-neck river tu ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Elseya Albagula
''Elseya albagula'', commonly known as the white-throated snapping turtle, is one of the largest species of chelid turtles in the world, growing to about carapace length. The species is endemic to south-eastern Queensland, Australia, in the Burnett, Mary, and Fitzroy River drainages. This species is entirely aquatic, rarely coming ashore and is chiefly herbivorous, feeding on the fruits and buds of riparian vegetation, algae, and large aquatic plants. First proposed as a species by John Goode in the 1960s,Goode J. 1967. ''Freshwater tortoises of Australia and New Guinea (in the family Chelidae)''. Melbourne: Landsdowne. 155 pp. it was finally described in 2006. The species is named from the Latin ''alba'' = white and ''gula'' = throat, which is a reference to the white blotching present on the throats of adult females in the species. The type locality for the species is the Burnett River in south-eastern Queensland, but it is also found in the Mary and Fitzroy River drainag ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Hydromedusa
''Hydromedusa'' is a turtle genus in the family Chelidae, commonly known as the South American snake-necked turtles. They are quite closely related to the South American side-necked swamp turtles (''Acanthochelys'') and the snake-necked turtles of the Australian-Melanesian region ('' Chelodina''), but less closely to the spine-necked river turtles of South America (''Podocnemididae'') which belong to a more modern lineage of Pleurodira. Species This genus contains the following extant and fossil species: * Brazilian snake-necked turtle, ''Cágado da Serra'', ''Hydromedusa maximiliani'' * Argentine snake-necked turtle, ''Cágado pescoço de cobra'', ''Hydromedusa tectifera'' * '' Hydromedusa casamayorensis'' , Salamanca Salamanca () is a city in western Spain and is the capital of the Province of Salamanca in the autonomous community of Castile and León. The city lies on several rolling hills by the Tormes River. Its Old City was declared a UNESCO World Herit ... and S ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  




Pelomedusidae
:''Alternatively, "Pelomedusidae" may refer to the Pelomedusoidea. See below for details.'' Pelomedusidae is a family of freshwater turtles endemic to sub-Saharan Africa, including Madagascar, São Tomé, and the Seychelles(Although this pop. may have been introduced by humans). They range in size from in carapace length, and are generally roundish in shape. They are unable to fully withdraw their heads into their shells, instead drawing them to the side and folding them beneath the upper edge of their shells, hence are called African side-necked turtles. The family contains two living genera. They are distinguished from their closest relatives by a hinge in the front section of the plastron.Obst, Fritz Jürgen (1998): elomedusinae ''In:'' Cogger, H.G., & Zweifel, R.G. (eds.): ''Encyclopedia of Reptiles and Amphibians'': 112-113. San Diego: Academic Press. . Pelomedusidae spends most of its time in the mud at the bottom of rivers or shallow lakes, where they eat invertebrates ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Pseudemydura Umbrina
The western swamp turtle or western swamp tortoise (''Pseudemydura umbrina'') is a critically endangered species of freshwater turtle endemic to a small portion of Western Australia. It is the only member of the genus ''Pseudemydura'' in the monotypic subfamily Pseudemydurinae. It is the sister taxon to the subfamily Chelodininae. As a consequence of the greatly altered habitat in the area in which it occurs near Perth, Western Australia, it exists in small fragmented populations, making the species critically endangered. Taxonomy The accepted description of the species by Friedrich Siebenrock was published in 1901. The first specimen of the western swamp tortoise was collected by Ludwig Preiss in 1839 and sent to Vienna Museum. There it was labelled "New Holland" and was named ''Pseudemydura umbrina'' 1901 by Seibenrock. No further specimens were found until 1953. In 1954, Ludwig Glauert named these specimens ''Emydura inspectata'', but in 1958, Ernest Williams of Harvard Un ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Chelodina Longicollis
The eastern long-necked turtle (''Chelodina longicollis'')Kennett, R., Roe, J., Hodges, K., and Georges, A. 2009. ''Chelodina longicollis'' (Shaw 1784) – eastern long-necked turtle, common long-necked turtle, common snake-necked turtle. ''In'': Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. ''Chelonian Research Monographs'' No. 5, pp. 031.1–031.8, is an east Australian species of snake-necked turtle that inhabits a wide variety of water bodies and is an opportunistic feeder. It is a side-necked turtle (Pleurodira), meaning that it bends its head sideways into its shell rather than pulling it directly back. Distribution The species is found throughout south eastern Australia where it is found west of Adelaide (South Australia) eastwards throughout Victo ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

XY Sex-determination System
The XY sex-determination system is a sex-determination system used to classify many mammals, including humans, some insects (''Drosophila''), some snakes, some fish ( guppies), and some plants ('' Ginkgo'' tree). In this system, the sex of an individual is determined by a pair of sex chromosomes. Females have two of the same kind of sex chromosome (XX), and are called the homogametic sex. Males have two different kinds of sex chromosomes (XY), and are called the heterogametic sex. In humans, the presence of the Y chromosome is responsible for triggering male development; in the absence of the Y chromosome, the fetus will undergo female development. There are various exceptions, such as individuals with Klinefelter syndrome (who have XXY chromosomes), Swyer syndrome (women with XY chromosomes), and XX male syndrome (men with XX chromosomes), however these exceptions are rare. In most species with XY sex determination, an organism must have at least one X chromosome in order ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


Rheodytes
''Rheodytes'' is a genus of turtle in the Chelidae family from Australia. It contains the following species: * Fitzroy River turtle (''Rheodytes leukops'') * † '' Rheodytes devisi'' (Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in ...) References Turtle genera Reptile genera with one living species Taxonomy articles created by Polbot {{turtle-stub ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]