The Spider Tortoise (Pyxis arachnoides) is a species of tortoise in the Testudinidae family.It is endemic to Madagascar and is one of only two species in the genus Pyxis.Very little is known about the life cycle of this endangered tortoise, which is believed to live for up to 70 years. The remaining tortoises are found only in south western Madagascar, where they inhabit the spiny vegetation of the sandy coastal areas.