Thoracochaeta brachystoma is a species of fly in the family Sphaeroceridae, the lesser dung flies.

It is found in the Palearctic .

[1][2][3] Thoracochaeta brachystoma is a typical inhabitant of sea coasts.

The larvae live in seaweed.

This article related to members of the muscomorph flies superfamily Sphaeroceroidea is a stub.