Revision and new data on the Coniacian ammonite genus Hemitissotia in the Iberian Peninsula (Spain and Portugal)

Abstract

The types of the species of the Coniacian ammonite genus Hemitissotia Peron, 1897, identified in the Iberian Peninsula (Spain and Portugal), which are currently held in the Wiedmann (Universität Tübingen, Germany) and Choffat (Instituto Geológico e Mineiro, Portugal) collections, have been revised and refigured. New specimens of the taxa Hemitissotia ceadouroensis Choffat, 1898,

The Tethyan oyster Pycnodonte (Costeina) costei (Coquand, 1869) in the Coniacian (Upper Cretaceous) of the Iberian Basin (Spain): Taxonomic, palaeoecological and palaeobiogeographical implications

“…As stated above, the middle member of the Hortezuelos Formation (middle-upper Coniacian; Barroso- Barcenilla et al, 2013;Segura et al, 2014) (Fig. 3).…”

“…Here, this species can be found as dense concentrations of large, mostly articulated specimens. Ammonites (Tissotioides hispanicus, Prionocycloceras iberiense, Tissotia sp., Hemitissotia ceadouroensis, H. turzoi: García-Hidalgo et al, 2012;Barroso-Barcenilla et al, 2013;Segura et al, 2014) are common in this stratigraphic succession of the Hortezuelos Formation, allowing a detailed biostratigraphic framework correlative to the middle Coniacian Gauthiericeras margae and the upper Coniacian Paratexanites serratomarginatus zones.…”