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Nilssonia (turtle)

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Genus of turtles

Nilssonia

Nilssonia leithii
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	Trionychidae
Subfamily:	Trionychinae
Genus:	Nilssonia Gray, 1872^[1]
Species
See text
Synonyms^[2]
NilssoniaGray, 1872: 332^[1] IsolaGray, 1873: 51^[3] AspideretesO.P. Hay, 1904: 274^[4]

Nilssonia is agenus ofsoftshell turtles (family Trionychidae) from rivers, streams, ponds, and lakes inSouth Asia and Burma. In many treatments, it ismonotypic, with the single speciesBurmese peacock softshell (N. formosa). However, the supposed other genus ofpeacock softshells,Aspideretes, is more closely related toN. formosa than had been believed. They differ only in the neural plates between the firstpleural scale pair of the bonycarapace, which are fused into one inN. formosa and unfused in the others.^[5]

Thus, it has been proposed to unite the two genera under the older name,Nilssonia. As it seems, the closest living relatives of the Burmese peacock softshell are theIndian softshell turtle (A./N. gangeticus) and theLeith's softshell turtle (A./N. leithii), making the merging of the genera well warranted.^[5]^[2]

Etymology

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Thegeneric name,Nilssonia, is in honor of Swedish zoologistSven Nilsson.^[6]

Species

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If the genera are united, the five species are:

Nilssonia formosa(Gray, 1869) – Burmese peacock softshell, Burmese softshell turtle
Nilssonia gangetica(Cuvier, 1825) – Indian softshell turtle, Ganges softshell turtle
Nilssonia hurum(Gray, 1831) – Indian peacock softshell turtle
Nilssonia leithii(Gray, 1872) – Leith's softshell turtle, Nagpur softshell turtle
Nilssonia nigricans(Anderson, 1875) – black softshell turtle, Bostami turtle

References

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^^a ^bGray, John Edward (1872). "Notes on the mud-tortoises of India (Trionyx, Geoffroy)".Annals and Magazine of Natural History, Fourth Series10: 326–340.
^^a ^bTurtle Taxonomy Working Group [van Dijk PP, Iverson JB, Rhodin AGJ, Shaffer HB, Bour R] (2014). "Turtles of the world, 7th edition: annotated checklist of taxonomy, synonymy, distribution with maps, and conservation status".In: Rhodin AGJ,Pritchard PCH, van Dijk PP, Saumure RA, Buhlmann KA, Iverson JB,Mittermeier RA (editors) (2014). "Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group".Chelonian Research Monographs5 (7): 000.329–479, doi:10.3854/ crm.5.000.checklist.v7.2014.
^Gray, John Edward (1873). "Notes on mud-tortoises (Trionyx, Geoffroy), and on the skulls of the different kinds".Proceedings of the Zoological Society of London1873: 38–72.
^Hay, Oliver P. (1904). "On the existing genera of the Trionychidae".Proceedings of the American Philosophical Society42: 268–274.
^^a ^bPraschag P, Hundsdörfer AK, Reza AHMA, Fritz U (2007). "Genetic evidence for wild-livingAspideretes nigricans and a molecular phylogeny of South Asian softshell turtles (Reptilia: Trionychidae:Aspideretes, Nilssonia)".Zool. Scripta36 (4): 301–310.doi:10.1111/j.1463-6409.2007.00282.x (HTML abstract)
^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011).The Eponym Dictionary of Reptiles. xiii + 296 pp.ISBN 978-1-4214-0135-5. ("Nilsson", p. 191).

Trionychidae family

Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Subclass:Anapsida
Order:Testudines
Superfamily:Trionychia

Genera

Species of theTrionychidae family

Amyda

Apalone

†Axestemys

Chitra

Cyclanorbis

Cycloderma

Dogania

Malayan softshell turtle

†Gilmoremys

†Gilmoremys gettyspherensis
†Gilmoremys lancensis

†Hutchemys

†Khunnuchelys

Lissemys

Nilssonia

†Palaeoamyda

†Palaeoamyda messeliana

Palea

Wattle-necked softshell turtle

Pelochelys

Pelodiscus

Rafetus

Trionyx

Phylogenetic arrangement of turtles based onturtles of the world 2017 update: Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status. †=extinct.

Testudines

Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Clade:Diapsida
Order:Testudines

Genus

Chelonioidea
(Sea turtles)

Cheloniidae	†Allopleuron Caretta †Carolinochelys Chelonia †Eochelone Eretmochelys †Gigantatypus †Glarichelys †Itilochelys Lepidochelys †Mexichelys †Miocaretta Natator †Pacifichelys †Syllomus †Tasbacka
Dermochelyidae	†Arabemys †Corsochelys †Cosmochelys Dermochelys †Eosphargis †Mesodermochelys †Psephophorus
	†Euclastes †Peritresius †Procolpochelys †Protosphargis †Puppigerus

Kinosternoidea

Dermatemydidae	Dermatemys
Kinosternidae	Claudius †Hoplochelys Kinosternon Staurotypus Sternotherus

Testudinoidea

Emydidae	†Acherontemys Chrysemys Clemmys Deirochelys Emys Actinemys Emydoidea Glyptemys Graptemys Malaclemys Pseudemys Terrapene Trachemys †Wilburemys
Geoemydidae	Batagur †Banhxeochelys Cuora Cyclemys Geoclemys Geoemyda Hardella Heosemys Leucocephalon Malayemys Mauremys Melanochelys Morenia Notochelys Orlitia Pangshura Rhinoclemmys Sacalia Siebenrockiella Vijayachelys
Platysternidae	Platysternon
Testudinidae	Aldabrachelys Astrochelys Centrochelys Chelonoidis Chersina Cylindraspis †Cymatholcus †Floridemys Geochelone Gopherus †Hadrianus †Hesperotestudo Homopus Indotestudo Kinixys Malacochersus Manouria †Megalochelys †Oligopherus Psammobates Pyxis †Solitudo Stigmochelys †Stylemys Testudo

Trionychia

Carettochelyidae	†Allaeochelys †Anosteira Carettochelys
Trionychidae	Amyda Apalone †Axestemys Chitra Cyclanorbis Cycloderma †Drazinderetes Dogania †Gilmoremys †Hutchemys †Khunnuchelys Lissemys Nilssonia Palea †Palaeoamyda Pelochelys Pelodiscus Rafetus Trionyx
	†Basilochelys †Sinaspideretes

Chelydridae	Chelydra †Chelydrops †Chelydropsis †Emarginachelys †Macrocephalochelys Macrochelys †Planiplastron †Protochelydra
†Nanhsiungchelyidae	†Anomalochelys †Basilemys †Jiangxichelys
†Protostegidae	†Alienochelys †Archelon †Atlantochelys †Bouliachelys †Calcarichelys †Cratochelone †Desmatochelys †Iserosaurus †Notochelone †Ocepechelon †Pneumatoarthrus †Protostega †Rhinochelys †Santanachelys †Terlinguachelys
	†Adocus †Argillochelys †Bashuchelys †Ctenochelys †Prionochelys †Toxochelys

Pleurodira

†Araripemydidae	†Araripemys
†Bothremydidae	†Araiochelys †Arenila †Azabbaremys †Bothremys †Cearachelys †Chedighaii †Chupacabrachelys †Eotaphrosphys †Foxemys †Galianemys †Ilatardia †Inaechelys †Itapecuruemys †Jainemys †Kinkonychelys †Kurmademys †Labrostochelys †Nigeremys †Phosphatochelys †Polysternon †Puentemys †Rosasia †Rhothonemys †Sankuchemys †Taphrosphys †Ummulisani †Zolhafah
Chelidae	Acanthochelys Chelodina Chelus Elseya Elusor Emydura Hydromedusa †Lomalatachelys Mesoclemmys Myuchelys Phrynops Platemys †Prochelidella Pseudemydura Rheodytes Rhinemys †Yaminuechelys
Pelomedusidae	Pelomedusa Pelusios
Podocnemididae	†Albertwoodemys †Bauruemys †Brontochelys †Caninemys †Carbonemys †Cerrejonemys †Cordichelys Erymnochelys †Lapparentemys †Latentemys Peltocephalus Podocnemis †Stupendemys
†Sahonachelyidae	†Sahonachelys †Sokatra

	†Caribemys †Caririemys †Tacuarembemys

Phylogenetic arrangement of turtles based onTurtles of the World 2017 Update: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status. † = extinct.

See alsoList of Testudines families

Taxon identifiers
Nilssonia	Wikidata:Q1932400 Wikispecies:Nilssonia ADW:Nilssonia BOLD:191035 CoL:646K EoL:35775 GBIF:2442516 iNaturalist:39576 IRMNG:1097472 ITIS:551764 NCBI:227453 Open Tree of Life:623210 WoRMS:1458134

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