The Meekoceratidae is a family of

ceratitid Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammoni ...

ammonites described in the ''

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

'', as being more or less involute, compressed, discoidal, smooth to weakly ornamented; venter arched or tabulate; sutures ceratitic with broad saddles.W.J Arkell, et al., 197=578. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press. Now includes four subfamilies.

References

Noritoidea Ceratitida families Early Triassic first appearances Middle Triassic extinctions {{Ceratitida-stub