Dimorphism and endemism in Hebetoxyites (Ammonoidea, lower Bajocian) from the Iberian Range (Spain)
New findings of lower Bajocian, haploceratid ammonites (Cephalopoda, Mollusca) of the genus Hebetoxyites from the Albarracín area are described and revised alongside specimens previously collected from the Iberian Range. Three species have been identified: H. hebes Buckman, H. incongruens Buckman an...
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/44097 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/44097 |
| Access Level: | acceso abierto |
| Palabra clave: | 564.53(234.1) Ammonites Middle Jurassic Taphonomy Systematics Evolution Submediterranean Province Jurásico Medio Tafonomía Sistemática Evolución Provincia Submediterránea Paleontología 2416 Paleontología |
| Sumario: | New findings of lower Bajocian, haploceratid ammonites (Cephalopoda, Mollusca) of the genus Hebetoxyites from the Albarracín area are described and revised alongside specimens previously collected from the Iberian Range. Three species have been identified: H. hebes Buckman, H. incongruens Buckman and H. mouterdei Fernández-López. Indigenous populations of these Tethyan species in the Iberian carbonate platform system, including macroconchs and microconchs, are interpreted as immigration and colonization of shallow-water marine environments by Submediterranean taxa during a short interval of the early Bajocian. As peramorphic result of palingenetic evolution, a chronocline from strongly ribbed, stout forms of the Ovale Zone (including H. mouterdei), to oxycones with blunt, simple or irregularly branched ribbing of the Laeviuscula Zone (including H. incongruens), through intermediate forms belon- |
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