Cenomanian ammonites from Santander (Cantabria) and Sopeira (Aragón, southcentral Pyrenees), northern Spain

Abstract

Upper Cenomanian (Cretaceous) ammonites are described for the first time from the environs of Santander (Cantabria) and Sopeira (Aragón, Huesca province) in northern Spain. The following species are present: Tetragonites subtimotheanus Wiedmann, 1962, Calycoceras (Newboldiceras) asiaticum asiaticum (Jimbo, 1894), Calycoceras (Newboldiceras) planecostatum (Kossmat, 1897), Eucalycoceras pentagonum (Jukes-Browne,1896), Eucalycoceras jeanneti Collignon, 1937, and Thomelites sornayi (Thomel, 1966). This assemblage is typical of the lower Upper Cenomanian Calycoceras (Proeucalycoceras) guerangeri Zone, with the exception of E. jeanneti, previously known only from Madagascar.