Hedenstroemia

Hedenstroemia; Temporal range: Triassic (Olenekian),[1] 251.3–247.2 Ma PreЄ Є O S D C P T J K Pg N ↓ [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 [2]
Genus:	Hedenstroemia; Waagen 1895

Hedenstroemia is an extinct genus of cephalopods in the ammonoid order Ceratitida. They were nektonic carnivores.^[2]

Species

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

J. Perrin Smith U.S. Lower Triassic Ammonoid of North America pg. 77 Geological Survey Professional Paper

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Hedenstroemia Temporal range: Triassic (Olenekian),^[1] 251.3–247.2 Ma PreЄ Є O S D C P T J K Pg N ↓ ^[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 ^[2]
Genus:	Hedenstroemia Waagen 1895