Meekoceratidae
The Meekoceratidae is a family of ceratitid ammonites described in the Treatise on Invertebrate Paleontology, as being more or less involute, compressed, discoidal, smooth to weakly ornamented; venter arched or tabulate; sutures ceratitic with broad saddles. Now includes four subfamilies. References Noritoidea Ceratitida families Early Triassic first appearances Middle Triassic extinctions