Brancoceratidae is a family of acanthoceratoid ammonites from the middle of the Cretaceous, recognized by their commonly evolute shells with round, oval, or quadrate whorls, strong ribs, usual ventral keels, and at least, umblical tubercles.

The family is thought to be derived from the Desmoceratidae (Desmoceratoidea), perhaps from Silesitoides or some allied genus.

Brancoceratinae Spath, 1933: Generally small, evolute with round, oval, square or rectangular whorl sections.

There are two main stocks, one of high-whorled compressed forms which left no descendants, the other, more evolute with round or square whorl sections, which gave rise to the Mortoniceratinae.

Mortoniceratinae Spath, 1925: Moderately involute to very evolute brancoceratids with more or less rounded, square, or compressed whorls; low or high keels and ribs that branch, at last on the early whorls but may be single on the body chamber or even earlier.