Hamulinidae

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).

Hamulinidae
Temporal range: Cretaceous,
Hamulina astieri from southern Alps, on display at Galerie de paléontologie et d'anatomie comparée, Paris
Scientific classification Edit this 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

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

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.


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