Hedenstroemia

Hedenstroemia Temporal range: Early Triassic (Olenekian),1 2
Fossil shell of Hedenstroemia tscherskii from Madagascar, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ceratitida
Family:	†Hedenstroemiidae
Genus:	†Hedenstroemia Waagen, 1895
Species2
See text

Hedenstroemia is an extinct genus of Early Triassic (Olenekian) cephalopods in the ammonoid order Ceratitida. They were nektonic carnivores.²

• †Hedenstroemia evoluta Spath, 1934
• †Hedenstroemia hedenstroemi Keyserling, 1845
• †Hedenstroemia kossmati Hyatt and Smith 1905
• †Hedenstroemia mojsisovicsi Diener 1897
• †Hedenstroemia tscherskii Popov 1939
• †Hedenstroemia waageni Welter 1922

Fossils of species within this family have been found in the Early Triassic of Afghanistan, Canada, Oman, Pakistan, Russia and United States.²