Mambachiton (meaning "crocodile armour") is an extinct genus of basal avemetatarsalian from the Middle/Upper Triassic Makay Formation (Isalo II beds) of Madagascar.

[1] The Mambachiton fossil specimens were discovered in sediments of the Makay Formation near Sakaraha in the southern Morondava Basin of Madagascar, and excavated later in 1997, 1998, and 2003.

An additional referred specimen, FMNH PR 5065, was found near the holotype and includes dorsal, sacral, and caudal vertebrae, both scapulocoracoids, the right ilium, and a partial femur.

Preliminary analyses considered Mambachiton to be a basal poposauroid (a clade of pseudosuchians), though the later recognition of aphanosaurs as early-diverging avemetatarsalians corrected this view.

The traversodontids Menadon and Dadadon, the rhynchosaur Isalorhynchus, and the lagerpetid Kongonaphon have also been described from the type locality, as well as the remains of unnamed reptiles, synapsids, and possibly amphibians.