Biology:Hamulinidae

Short description: Extinct family of molluscs

Hamulinidae Temporal range: Cretaceous, 140.2–99.7 Ma PreЄ Є 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. 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

References

• "Hamulinidae". The Paleobiology Database. http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=133065. Retrieved 13 June 2022. 
• "Hamulinidae". mindat.org. https://www.mindat.org/taxon-4626846.html. 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. Treatise on Invertebrate Paleontology Part L. 4. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p. 230-232. https://archive.org/details/treatiseoninvert0000join/page/n3/mode/2up?view=theater. 

Wikidata ☰ Q16982710 entry