''Heinzia'' is an extinct ammonoid cephalopod genus belonging to the family

Pulchelliidae ''Pulchelliidae'' is an extinct ammonoid cephalopod family. 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 ...

. They lived during 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 ...

, in the

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 precede ...

age.

Distribution

Fossils of species within this genus have been found in the

sediments of Colombia, France, Italy, Morocco and Spain.

References

Crioceratites
* Jean Vermeulen
Origine, classification et évolution des Pulchellinae (Douville) 1911 emend. Vermeulen 1995 (Pulchelliidae, Endemoceratoidea)
* C. W. Wright, J. H. Calloman and M. K. Howarth, 199
Treatise on invertebrate paleontology, volume 4 : cretaceous ammonoidea
* Vermeulen, Jean., 1995
A new division in three parts of the Pulchelliidae family Ammonoidea
Riviera Scientifique, 65-80 Ammonitida genera Endemoceratoidea Cretaceous ammonites Ammonites of Europe Paja Formation {{Ammonitina-stub