Hamulinidae is an extinct
ammonoid
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...
cephalopod family belonging to the order
Ammonitida.
[ 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.] 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
References
*
*
Cretaceous ammonites
Ammonitida families
Ancyloceratoidea
{{Ammonitida-stub