The extinct Solenoporaceae have traditionally been interpreted as a group of red algae ancestral to the Corallinales.

[5] Unlike the Corallinaceae, this family has large vegetative cells and an undifferentiated thallus.

[6] The differences in structure suggest that the holotype is not an alga at all, but rather is a chaetetid sponge.

[8] Some specimens of algal Solenopora retain an original pink colouration, which is banded with growth stages of the fossil; this is produced by boron-containing hydrocarbons.

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