Heinzia is an extinct ammonoid cephalopod genus belonging to the family Pulchelliidae. They lived during the Cretaceous, in the Barremian age.
Distribution Fossils of species within this genus have been found in the Cretaceous sediments of Colombia, France, Italy, Morocco and Spain.
References
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Crioceratites Jean Vermeulen Origine, classification et évolution des Pulchellinae (Douville) 1911 emend. Vermeulen 1995 (Pulchelliidae, Endemoceratoidea)
Vermeulen, Jean., 1995: A new division in three parts of the Pulchelliidae family Ammonoidea Riviera Scientifique, 65-80