Cantú Chapa, A. (2012). The suture line patterns in Olcostephanidae and Spiticeratidae, ammonites of the Upper Jurassic-Lower Cretaceous: systematic considerations. Paleontología Mexicana. 62: 52-66.
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Cantú Chapa, A.
2012
The suture line patterns in Olcostephanidae and Spiticeratidae, ammonites of the Upper Jurassic-Lower Cretaceous: systematic considerations