''Hemihoplites'' is an extinct genus of ammonoid cephalopods belonging to the family

Hemihoplitidae Hemihoplitidae is an extinct family of ammonoid cephalopods belonging to the superfamily Ancyloceratoidea. Fossils of species within this genus have been found in the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 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. 228, 231. These fast-moving nektonic carnivores lived in the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

period, from

Hauterivian The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous Epoch or a stage in the Lower Cretaceous Series. It spans the time between 132.9 ± 2 Ma and 129.4 ± 1.5 Ma (million years ago). The Hauterivian is preceded by the Va ...

age to

Barremian The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 129.4 ± 1.5 Ma (million years ago) and 121.4 ± 1.0 Ma). It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is preceded ...

age.Sepkoski, Jac
Sepkoski's Online Genus Database – Cephalopoda
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Description

It is evolute, compressed. The Whorl section is rectangular. The ribs are simple or branching or long or short, well spaced, straight or slightly flexuous, crossing flat venter transversely, typically with distinct umbilical and ventrolateral tubercles. 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. 228, 231.

Species

* ''Hemihoplites feraudianus'' (d'Orbigny, 1841) * ''Hemihoplites mexicanus'' Imlay, 1940 * ''Hemihoplites ploszkiewiczi'' Riccardi and Aguirre Urreta, 1989 * ''Hemihoplites soulieri'' (Matheron, 1878) * ''Hemihoplites varicostatus'' Riccardi and Aguirre Urreta, 1989

Distribution

Fossils of species within this genus have been found in the

rocks of Antarctida ( Alexander Island), Bulgaria, southeastern France, Mexico, Slovakia, South Africa and Trinidad and Tobago.

References

External links

* Cretaceous ammonites Ammonites of Europe Ammonitida genera Ancyloceratoidea Cretaceous France Fossils of France Fossils of Antarctica Ammonites of North America {{Ammonitida-stub