Maculicorpus is a genus of fossil placozoan from the Middle Triassic of Germany, and the first placozoan known from the fossil record. It comprises a single known species, Maculicorpus microbialis.
Maculicorpus is known from a microbialite bed discovered in the Troistedt Quarry near Weimar, as part of the Meißner Formation. The microbialite has been dated to the late Anisian to early Ladinian.
The specimens referred to Maculicorpus appear as flat patches, brown to ochre in color, varying between and in diameter. The outline is irregular and varies in overall shape from circular to elongate, fan-shaped or multi-lobed. The holotype, in length, is constricted in the middle, appearing as an aggregate of a larger, irregularly rounded portion and a smaller elliptical one. Maculicorpus is larger than any modern-day placozoan.