[2][3] Concavodontinae fossils are found in Europe and South America,[4] and species are thought to have been stationary attached to substrate in shallow infaunal marine water environments where they formed shells of an aragonite composition.

The type genus Concavodonta is composed of three species found in Bavaria, France, and Argentina.

While several specimens from other taxa, such as Praeleda costae and Ctenodonta have been found with occasional concavodont teeth, they are not typical.

In both Concavodonta and Emiliodonta both the anterior and posterior rows of teeth in the shell face outwards away from the umbo.

Concavodontinae differs from the second subfamily in Praenuculidae, Praenuculinae, whose members are identified by tooth chevrons with concavities facing the outer edges of the shell and chevron points facing the umbo.