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Tarragona, Spain

Osso-Morales A.,Josep Vicenc Foix | Artal P.,Museo Geologico Del Seminario de Barcelona | Vega F.J.,National Autonomous University of Mexico
Revista Mexicana de Ciencias Geologicas | Year: 2010

The presence of the genera Costacopluma and Ophthalmoplax in Upper Cretaceous (Campanian) Moroccan strata is documented on the basis of specimens collected from the Calcaires à slumps de Taghit Formation, Moyenne Moulouya (Morocco). Two new species are described, Ophthalmoplax minimus and Costacopluma maroccana. The first record for Opthalmoplax in the west Tethyan realm is reported, and systematic affinities of this genus and its species are discussed. An absolute age of the late Campanian was obtained for this assemblage from 87Sr/86Sr analysis applied to well preserved cuticle calcitic remains of Ophthalmoplax minimus. Costacopluma maroccana represents the 14th species for this genus and the fourth Cretaceous species. Its morphology reinforces hypothesis of two main phyletic groups for this genus. Source

Vega F.J.,National Autonomous University of Mexico | Jackson J.,P.O. Box 295 | Osso A.,Josep Vicenc Foix
Boletin de la Sociedad Geologica Mexicana | Year: 2014

One specimen of the brachyuran (Etyoidea: Feldmanniidae) Caloxanthus americanus from the Cenomanian Grayson Formation in Texas (U.S.A.) is here reported. The specimen includes morphological details not previously described for this species. In particular, the preservation of the eye structure is remarkable and it represents one of the few records of composite eye preservation in fossil brachyurans. Source

Osso A.,Josep Vicenc Foix | Isa M.D.,Calle del Ingenio
Boletin de la Sociedad Geologica Mexicana | Year: 2014

The discovery of Cantabroxanthus loredoensis n. gen., n. sp., from the Sponge Beds (middle Campanian) of Cantabria (Spain), increases the number of known Cretaceous brachyuran taxa that the coastline outcrops of Cantabria have yielded. The new genus is herein placed within the family Feldmanniidae (Etyoidea) on the basis of similarities with the genus Caloxanthus A. Milne-Edwards, 1864. Cantabroxanthus is also compared to the Palaeocorystoidea families, however important differences, for example, Cantabroxanthus possesses an entire supraorbital margin, preclude any relationship with Palaeocorystoidea. Source

A new decapod brachyuran, Agostella terrersensis n. gen. et sp. (Goneplacoidea) is described from the Lutetian, middle Eocene outcrops of Agost (Alicante province, Spain) increasing the number of new species discovered in this zone of the western Tethys. The taxonomic placement of Agostella n.gen. is discussed and also the assignment of some fossil genera to the Mathildellidae (Goneplacoidea). Source

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