The affinities between the Lower Cretaceous Ammonoidea Ammonites crassicostatus d'Orbigny, 1841 and Ammonites gargasensis d'Orbigny, 1841
Resumen
Abstract
The present contribution provides a taxonomic reassessment of the Lower Cretaceous ammonite species Ammonites crassicostatus
d'Orbigny (type species of Colombiceras Spath) and Ammonites gargasensis d'Orbigny (type species of Gargasiceras Casey) from the Aptian-
type area (Apt, Vaucluse, southeastern France). Those nominal species represent two ornamental poles of a single population, here referred
to C. crassicostatum. The genus Gargasiceras is, therefore, synonymised with Colombiceras. Implications on the taxonomy at the specific,
generic, and supra-generic levels are discussed.
Resumen
El presente trabajo proporciona una reevaluación taxonómica de las especies de ammonites del Cretácico temprano Ammonites crassicostatus
d'Orbigny (especie tipo de Colombiceras Spath) y Ammonites gargasensis d'Orbigny (especie tipo de Gargasiceras Casey) del área tipo del
Aptiano (Apt, Vaucluse, sureste de Francia). Estas especies nominales representan dos polos ornamentales de una sola población, aquí referida
como C. crassicostatum. Por lo tanto, el género Gargasiceras se sinonimiza con Colombiceras. Se discuten las implicaciones taxonómicas
a nivel específico, genérico y supragenéric.
Palabras clave
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