Diplomoceratidae is a family of ammonites included in the order Ammonitida. Fossils of species within this genus have been found in the Cretaceous sediments (age range: from 99.7 to 66.043 million years ago).Paleobiology database Studies of Diplomoceras suggest that members of this family could reach lifespans of over 200 years.
Genera Chesapeakella Kennedy and Cobban, 1993 Diplomoceras Hyatt, 1900 Glyptoxoceras Spath, 1925 Neancyloceras Spath, 1926 Scalarites Wright and Matsumoto, 1954 Neoglyptoxoceras Collignon, 1969 Phylloptychoceras Spath, 1953 Oxybeloceras Hyatt, 1900 Polyptychoceras Yabe, 1927 Pseudoxybeloceras Wright and Matsumoto, 1954 Solenoceras Conrad, 1860
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