[1] Fossils of Menadon were first found in Isalo II (the Makay Formation) of Madagascar, which preserves sediments from the Middle to Late Triassic period.

[1][2] They have also been recovered from the Santa Maria Formation of the Paraná Basin near Santa Cruz do Sul in Rio Grande do Sul, Brazil.

[3] Menadon was unique among non-mammalian synapsids for the presence of hypsodont (high-crowned) postcanine teeth.

Hypsodont teeth grow continuously to counteract high wear caused by a diet of abrasive plant material.

Menadon's teeth convergently resemble those of hypsodont xenarthrans such as sloths and armadillos, due to their column-like form and dentine which grows from the crown towards the root.