Original paper

New data on the Toarcian nautiloids in the Iberian Peninsula (Spain and Portugal)

Barroso-Barcenilla, Fernando; Comas-Rengifo, María José; Duarte, Luís Vítor; Goy, Antonio; Martínez, Gemma


The nautiloids assigned to the genera Cenoceras, Ophionautilus and Digonioceras of the Universidad Complutense de Madrid and the Instituto Geológico y Minero de España, Spain, and the Universidade de Coimbra and the Instituto Geológico e Mineiro de Portugal, Portugal, obtained from the Toarcian of the Iberian Peninsula have been studied and classified. As a result, new representatives of the species Cenoceras fontannesi, C. semistriatum, C. robustum, C. jourdani, C. astacoides, C. toarcense, C. ciryi, C.? beirense, Ophionautilus sp., Digonioceras sp. 1 and D. sp. 2 have been identified and described. Additionally, the holotype of C. fontannesi has been refigured, and the neotype of C.? beirense has been designated and figured. Although some of these species have already been cited in the literature, most of them have never been previously clearly described or illustrated, and their stratigraphic distributions have not been determined accurately for this region. Therefore, the present work, joined to that recently presented by the same authors on the new genus Ligeiceras, constitutes a notable advance to classify and to group these scarcely-known Toarcian cephalopods in South-western Europe.


NautiloideaToarcianSystematicsBiostratigraphyIberian PeninsulaSpainPortugal