2026-06-29T09:38:45Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/440972023-08-27T11:42:21Zcom_20.500.14352_14col_20.500.14352_15
Dimorphism and endemism in Hebetoxyites (Ammonoidea, lower Bajocian)
from the Iberian Range (Spain)
Fernández López, Sixto Rafael
564.53(234.1)
Ammonites
Middle Jurassic
Taphonomy
Systematics
Evolution
Submediterranean Province
Jurásico Medio
Tafonomía
Sistemática
Evolución
Provincia Submediterránea
Paleontología
2416 Paleontología
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-
Depto. de Geodinámica, Estratigrafía y Paleontología
Fac. de Ciencias Geológicas
TRUE
pub
2023-06-20T03:37:53Z
2023-06-20T03:37:53Z
2012
journal article
https://hdl.handle.net/20.500.14352/44097
1661-5468
eng
open access
application/pdf
Muséum d'histoire naturelle de Genève