%0 Journal Article
%A Fernández López, Sixto Rafael
%T Dimorphism and endemism in Hebetoxyites (Ammonoidea, lower Bajocian)from the Iberian Range (Spain)
%D 2012
%@ 1661-5468
%U https://hdl.handle.net/20.500.14352/44097
%X New findings of lower Bajocian, haploceratid ammonites (Cephalopoda, Mollusca) of the genus Hebetoxyites from the Albarracín areaare 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 speciesin the Iberian carbonate platform system, including macroconchs and microconchs, are interpreted as immigration and colonization ofshallow-water marine environments by Submediterranean taxa during a short interval of the early Bajocian. As peramorphic result ofpalingenetic evolution, a chronocline from strongly ribbed, stout forms of the Ovale Zone (including H. mouterdei), to oxycones withblunt, simple or irregularly branched ribbing of the Laeviuscula Zone (including H. incongruens), through intermediate forms belon-
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