Beresellaceae is an extinct family of organisms of uncertain affinity, sometimes placed within the Metazoa (multicellular animals),[2] but tentatively assigned to the green alga order Dasycladales.

[3][4] Beresellids were cosmopolitan and their fossils are found in strata ranging in age from the late Devonian to the early Permian.

Classification is based on the distinctive two-layer walls[4] and verticils (blind pores) branching outward from the cylindrical body.

[5] Beresellids became important marine carbonate sediment producers in the middle Carboniferous, in association with various phylloid algae.

[1][6] Local accumulations were sometimes extensive enough to be distinguished as beresellid bafflestone or packstone, making this a rock-forming family of algae.