Hedenstroemiidae
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''Hedenstroemiidae'' is an extinct family of cephalopods in the
ammonoid 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 cuttlefish) ...
order Ceratitida. They were nektonic carnivores.


Genera

* '' Clypites'' Waagen 1895 * '' Cordillerites'' Hyatt and Smith 1905 * ''
Hedenstroemia ''Hedenstroemia'' is an extinct genus of Early Triassic (Olenekian) cephalopods in the ammonoid order Ceratitida. They were nektonic carnivores. Species Distribution Fossils of species within this family have been found in the Early Triassic o ...
'' Waagen 1895 * ''
Mesohedenstroemia ''Mesohedenstroemia'' is a genus of ammonites. It was described by Chao in 1959, who described three species; ''M. kwangsiana'' (the type species), ''M. inflata Chao, 1959'', and ''M. planata'', from the Triassic of what is now China. A new speci ...
'' Chao 1959 * '' Parahedenstroemia'' Spath 1934 * '' Pseudohedenstroemia'' * '' Pseudosageceras'' Diener 1895 * '' Tellerites'' Mojsisovics 1902


Distribution

Fossils of species within this family have been found in the Triassic of Afghanistan, Canada, Oman, Pakistan, Russia and United States.


References

Triassic ammonites Ceratitida families {{Ceratitida-stub