Cephalopoda - Ammonitida - Acanthohoplitidae

Full reference: M. Collignon. 1962. Atlas des fossiles caractéristiques de Madagascar (Ammonites). Fascicule IX (Aptien). Service Géologique Tananarive 1-64

Parent taxon: Gargasiceras according to M. Collignon 1962

Sister taxa: Gargasiceras aptiense, Gargasiceras recticostatum

Subtaxa: Gargasiceras (Pseudogargasiceras) enigmaticum

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Ecology: fast-moving nektonic carnivore

Distribution: found only at Loc. 47A, Ambanjabe, Mitsinjo-Namakia (Cretaceous of Madagascar)

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