Flat-backed spider tortoise

Flat-backed spider tortoise

Conservation status
Critically Endangered (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Family:	Testudinidae
Genus:	Pyxis
Species:	P. planicauda
Binomial name
*Pyxis planicauda* (Grandidier, 1867)

The flat-backed spider tortoise, flat-shelled spider tortoise, or Madagascar flat-shelled tortoise (Pyxis planicauda) is a species of turtle in the Testudinidae family. It is endemic to Madagascar.

Source

Tortoise & Freshwater Turtle Specialist Group 1996. Pyxis planicauda. 2006 IUCN Red List of Threatened Species. Downloaded on 29 July 2007.

Tortoise family of turtles (Testudinidae)

Genus	Species of the tortoise family

Aldabrachelys	Aldabra giant tortoise¹

Astrochelys	Angonoka tortoise · Radiated tortoise

Chelonoidis	Argentine tortoise · Brazilian giant tortoise · Chaco tortoise · Galápagos tortoise · Red-footed tortoise

Chersina	Bowsprit tortoise

Cylindraspis†	Domed Mauritius giant tortoise† · Domed Rodrigues giant tortoise† · Réunion giant tortoise† · Saddle-backed Mauritius giant tortoise† · Saddle-backed Rodrigues giant tortoise†

Geochelone	African spurred tortoise · Burmese star tortoise · Indian star tortoise

Gopherus	Bolson tortoise · Desert tortoise · Gopher tortoise · Texas tortoise

Homopus	Beaked cape tortoise · Berger's cape tortoise · Boulenger's cape tortoise · Karoo cape tortoise · Speckled padloper tortoise

Indotestudo	Elongated tortoise · Forsten's tortoise · Travancore tortoise

Kinixys	Bell's hinge-back tortoise · Forest hinge-back tortoise · Home's hinge-back tortoise · Lobatse hinge-back tortoise · Natal hinge-back tortoise · Speke's hinge-back tortoise

Malacochersus	Pancake tortoise

Manouria	Asian forest tortoise · Impressed tortoise

Psammobates	Geometric tortoise · Serrated tortoise · Tent tortoise

Pyxis	Flat-backed spider tortoise · Spider tortoise

Stigmochelys	Leopard tortoise

Testudo	Hermann's tortoise · Kleinmann's tortoise · Marginated tortoise · Russian tortoise · Spur-thighed tortoise

Phylogenetic arrangement of turtles based on turtles of the world 2010 update: annotated checklist of taxonomy, synonymy, distribution and conservation status. Key: †=extinct. ¹=classification unclear

Order Testudines (turtles)

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

Suborder

Superfamily

Family

Subfamily	Genus

Cryptodira

Chelydridae

	Chelydra Macrochelys

Chelonioidea

Cheloniidae

	Caretta Chelonia Eretmochelys Lepidochelys Natator

Dermochelyidae

	Dermochelys

Kinosternoidea

Dermatemydidae

	Dermatemys

Kinosternidae

Kinosterninae	Kinosternon Sternotherus

Staurotypinae	Claudius Staurotypus

Testudinoidea

Emydidae

Deirochelyinae	Chrysemys Deirochelys Graptemys Malaclemys Pseudemys Trachemys

Emydinae	Clemmys Emys Glyptemys Terrapene

Geoemydidae

	Batagur Cuora Cyclemys Geoclemys Geoemyda Hardella Heosemys Leucocephalon Malayemys Mauremys Melanochelys Morenia Notochelys Orlitia Pangshura Rhinoclemmys Sacalia Siebenrockiella Vijayachelys

Platysternidae

	Platysternon

Testudinidae

	Aldabrachelys Astrochelys Chelonoidis Chersina Cylindraspis Geochelone Gopherus Homopus Indotestudo Kinixys Malacochersus Manouria Psammobates Pyxis Stigmochelys Testudo

Trionychia

Carettochelyidae

	Carettochelys

Trionychidae

Cyclanorbinae	Cyclanorbis Cycloderma Lissemys

Trionychinae	Amyda Apalone Chitra Dogania Nilssonia Palea Pelochelys Pelodiscus Rafetus Trionyx

Pleurodira

Chelidae

Chelidinae	Acanthochelys Chelus Mesoclemmys Phrynops Platemys Rhinemys

Chelodininae	Chelodina Elseya Elusor Emydura Pseudemydura Rheodytes

Hydromedusinae	Hydromedusa

Pelomedusidae

	Pelomedusa Pelusios

Podocnemididae

	Erymnochelys Peltocephalus Podocnemis

Phylogenetic arrangement based on turtles of the world 2010 update: annotated checklist. Extinct turtles not included.

See also List of Testudines families

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