Hamulinidae Explained

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

References

• Web site: Hamulinidae . The Paleobiology Database . 13 June 2022.
• Web site: Hamulinidae . mindat.org . 13 June 2022.
• Book: [[Claud William Wright |Wright C.W.]] with J.H. Callomon and M.K. Howarth . 1996 . Mollusca 4 Revised: Cretaceous Ammonoidea . 4 . Treatise on Invertebrate Paleontology Part L . Roger L. Kaesler . Boulder, Colorado and Lawrence, Kansas . The Geological Society of America & University of Kansas Press . registration . 230-232 . Internet Archive.

Notes and References

1. with and (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.