''Clymeniina'' is an extinct suborder of

ammonites Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttl ...

that existed during the Devonian.

References

Clymeniida Devonian ammonites Late Devonian first appearances Late Devonian animals Famennian extinctions {{Clymeniida-stub