title: Diplomoceratidae
text: # Diplomoceratidae
  
  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). 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
  