Hamulinidae

Hamulinidae Temporal range: Cretaceous, 140.2–99.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Hamulina astieri from southern Alps, on display at Galerie de paléontologie et d'anatomie comparée, Paris
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Suborder:	†Ancyloceratina
Superfamily:	†Ancyloceratoidea
Family:	†Hamulinidae Gill, 1871

Hamulina subalternata sp. nov. Lower Barremian, Brestak, (Coll. St. Breskovski) at the Sofia University Museum of Paleontology and Historical Geology

Hamulinidae is an extinct ammonoid cephalopod family belonging to the order Ammonitida.[1] These cephalopod were fast-moving nektonic carnivores. They lived during the Lower Cretaceous period (Lower Barremian - Upper Barremian).

Description

The long main shaft is followed by a hook and a shorter, close, parallel or slightly divergent final shaft. The ammonitic suture is with a subtrifid L. The U is usually reduced or indifferentiated in adults.

Genera

• Anahamulina
• Hamulina

Notes

1. Wright, C. W. with Callomon, J.H. and Howarth, M.K. (1996), Mollusca 4 Revised, Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, pp. 230-232.

References

• "Hamulinidae". The Paleobiology Database. Retrieved 13 June 2022.
• "Hamulinidae". mindat.org. Retrieved 13 June 2022.
• Wright C.W. with J.H. Callomon and M.K. Howarth (1996). "Mollusca 4 Revised: Cretaceous Ammonoidea". In Roger L. Kaesler (ed.). Treatise on Invertebrate Paleontology Part L. Vol. 4. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p. 230-232 – via Internet Archive.