See text Prosopistomatidae is a family of mayflies.

There is one extant genus, Prosopistoma, with several dozen species found across Afro-Eurasia and Oceania.

They are noted for their unusual beetle-shaped larvae, which live beneath rocks and stones along the gravelly lower reaches of rivers.

[4] They are closely related to Baetiscidae, with both families being placed in the Carapacea.

[5] These two genera belong to the family Prosopistomatidae: