Emiliodonta is known solely from late Ordovician, Caradocian epoch, fossils found in South America.

[1][2] Emiliodonta cuerdai is a bivalve first described in 1999 by Teresa M. Sánchez from fossils from sediments of the late Middle Ordovician, Caradocian-aged Don Braulio Formation.

The formation outcrops on the flank of Sierra de Villicum in the Argentina precordillera.

[1] As a member of Concavodontinae, the hinge displays the chevroning of teeth typical of the subfamily.

[2] The species epithet cuerdai was coined in honor of C. Cuerda, a professor at the Universidad de La Plata and friend of Teresa M.