page_title: Tetragonias
hierarchical_section_title: Tetragonias
caption_attribution_description: Italiano: Fossil of Tetragonias, an extinct therapsid - Took the picture at Museum of Paleontology, Tuebingen
context_page_description: Tetragonias is an extinct genus of non-mammalian synapsid from the Anisian Manda Beds of Tanzania. Tetra- means “four, ” and goni- means “angle, ” referencing the square shape of the Tetragonias skull when viewed dorsally. Not to be confused with Tetragonia, Tetragonias were dicynodont anomodonts discovered in the late 1960s by paleontologist A. R. I. Cruickshank in the Manda Formation.
  Originally thought to have existed during the lower Middle Triassic age, also called the Anisian age, Gay and Cruickshank later postulated that the Manda Formation may have actually been of the Ladinian age. This terrestrial herbivore was determined to have relation to the genera Lystrosaurus and Kannemeyeria. It is also classified under Amniota as well as the family, Shansiodontidae. The most common species type analyzed is Tetragonias njalilus.
context_section_description: Tetragonias is an extinct genus of non-mammalian synapsid from the Anisian Manda Beds of Tanzania. Tetra- means “four,” and goni- means “angle,”  referencing the square shape of the Tetragonias skull when viewed dorsally. Not to be confused with Tetragonia, Tetragonias were dicynodont anomodonts discovered in the late 1960s by paleontologist A. R. I. Cruickshank in the Manda Formation.
  
  Originally thought to have existed during the lower Middle Triassic age, also called the Anisian age, Gay and Cruickshank (1999) later postulated that the Manda Formation may have actually been of the Ladinian age. This terrestrial herbivore was determined to have relation to the genera Lystrosaurus and Kannemeyeria. It is also classified under Amniota as well as the family, Shansiodontidae. The most common species type analyzed is Tetragonias njalilus.
caption: Tetragonias Fossil
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