Named By: Graciela Piņeiro, Alejandro Ramos and Claudia Marsicano - 2012.
Classification: Chordata, Amphibia, Temnospondyli, Stereospondylomorpha, Stereospondyli.
Species: A. nigra (type).
Known locations: Uruguay - Buena Vista Formation.
Time period: Late Permian/Early Triassic.
Fossil representation: Almost perfectly preserved skull (FC-DPV 1369).
Arachana was a key find for the study of temnospondyls because the skull possesses a mix of features which show a transition between rhinesuchids and lydekkerinids. Aside from helping to establish a lineage between these groups, but also illustrates that temnospondyls were trying to adapt to changing environmental conditions from the effects of the Permian extinction.
- A rhinesuchid-like temnospondyl from the Permo-Triassic of Uruguay, Graciela Piņeiro, Alejandro Ramos and Claudia Marsicano - 2012.