eyes. The lower temporal fenestra is open at the bottom, separating the jugal and the quadratojugal bones (a primitive trait for archosauromorphs). Also like other early archosauromorphs, Azendohsaurus has a small (3–5 mm across) parietal foramen ("third eye") on the roof of the skull. The lower jaw is especially convergent with those of sauropodomorphs, with an articular joint where the jaw hinges positioned below the level of the tooth row and downward curving dentaries, as well as the similarly shaped teeth. These features are variously found in other herbivorous Triassic archosauromorphs, but this combination is only known in Azendohsaurus and sauropodomorphs. The teeth are all roughly leaf-shaped (lanceolate) with expanded crowns and bulbous bases that are fused to the jaw bones (ankylothecodont). However, the upper and lower teeth are distinctly heterodont, and can be readily distinguished from each other. The upper teeth are relatively short and broad at their base, with 4–6 denticles on each surface, similar to ornithischians; the lower teeth are almost twice as tall and have twice as many denticles, more closely resembling the teeth of sauropodomorphs. The four premaxillary teeth are the longest teeth in the upper jaw, and are more recurved back in shape than the rest. The palate is unusually covered in numerous fully developed palatal teeth, with up to four sets on the pterygoid and additional rows on the palatine and vomers. Mature Azendohsaurus madagaskarensis have at least 44 pairs of palatal teeth, in addition to the 4 teeth in each premaxilla and 11–13 in the maxilla each, along with a maximum of 17 teeth in the dentary. Palatal teeth are not uncommon in herbivorous reptiles, but in Azendohsaurus they are almost identical in shape to those along the jaw margins, but a bit stouter. Other archosauromorphs with palatal teeth have a much simpler palatal dentition of small, domed teeth. Teraterpeton is the only other archosauromorph with similarly well developed palatal teeth. The only described material of A. laaroussii are dentaries, maxillae, a premaxilla and several teeth. They broadly resemble A. madagaskarensis in general form but with a few distinguishing differences. The tooth count of A. laaroussii is higher, with 15–16 teeth in the maxilla compared to the 11–13 of A. madagaskarensis. The teeth of A. laaroussii are also taller than those of A. madagaskarensis and have more closely packed denticles. Further distinguishing the two species is the presence of a prominent keel