https://hdl.handle.net/2072/352278 2026-04-07T10:49:11Z 2026-04-07T10:49:11Z Schlagintweit, Felix Vicedo, Vicent Rashidi, Koorosh Frijia, Gianluca Consorti, Lorenzo https://hdl.handle.net/2072/488898 2026-01-12T09:22:05Z 2025-11-01T00:00:00Z

Gusicella Schlagintweit & Rashidi, 2021 (type species Dictyoconella minima Henson, 1948), Upper Cretaceous Larger Benthic Foraminifer and its species Schlagintweit, Felix; Vicedo, Vicent; Rashidi, Koorosh; Frijia, Gianluca; Consorti, Lorenzo Based on new material from the middle to upper Cenomanian Natih Formation (members A and B) from Oman, the little-known species Gusicella minima (Henson), originally described from the Mishrif Formation of Qatar (Dukhan wells) is redescribed. Late Maastrichtian specimens from the Tarbur Formation of SW Iran previously assigned to the Cenomanian species display a more complex marginal zone and are therefore introduced as Gusicella complexa Schlagintweit & Rashidi sp. nov. Representatives of Gusicella have so far only been reported from the Arabian Plate, showing its endemic character. There is no record of the genus so far from the Turonian to early Maastrichtian interval.

2025-11-01T00:00:00Z Martín-Closas, Carles Vicedo, Vicent Bover-Arnal, Telm https://hdl.handle.net/2072/484470 2025-07-15T09:43:38Z 2025-06-04T00:00:00Z

A refugium for charophytes during the maximum post-Palaeozoic sea-level highstand in the Turonian of Tarragona (Catalonia, Spain) Martín-Closas, Carles; Vicedo, Vicent; Bover-Arnal, Telm During the Cenomanian–Turonian interval, Europe was largely submerged under a shallow tropical sea within the Cretaceous Tethyan Archipelago. Non-marine lacustrine habitats were limited to a few coastal lakes on the islands. This study reports an island refugium for charophytes in Upper Cretaceous Tarragona located at the palaeo-shores of the former Ebro Massif. The Upper Cretaceous of Tarragona comprises three carbonate formations that record a Cenomanian–Turonian transgressive-regressive sequence. This sequence is represented by a shallow marine platform to pelagic facies at the base, overlain by lacustrine and palustrine facies at the top. These non-marine deposits are newly attributed to the Turonian, based on the stratigraphic context and the presence of the species Atopochara trivolvis var. multivolvis. In addition to this dominant species, the charophyte assemblage contains a clavatoroidean species, represented by the thallus Munieria grambastii forma sarda, and is associated with freshwater gastropods. A. trivolvis var. multivolvis had a wide distribution in the Northern Hemisphere at a palaeolatitude of around 40ºN, occurring in the United States, Spain, France, and Armenia. The European localities suggest that the island charophyte flora in the Cretaceous Tethyan Archipelago was an impoverished version of the pre-high stand Early Cretaceous flora, which was dominated by clavatoraceans. This contrasts with coeval floras from the mainland (Chinese and Argentinian basins), where Turonian charophyte communities were diverse and already dominated by modern characean genera. The island lakes acted as refugia for the last clavatoracean-dominated charophyte communities before their complete replacement by modern characean communities during the latest Cretaceous.

2025-06-04T00:00:00Z Silva-Casal, Roi Serra-Kiel, Josep Payros, Aitor https://hdl.handle.net/2072/482476 2026-01-16T07:55:37Z 2021-07-26T00:00:00Z

Systematics of Lutetian larger foraminifera and magnetobiostratigraphy from the South Pyrenean Basin (Sierras Exteriores, Spain) Silva-Casal, Roi; Serra-Kiel, Josep; Payros, Aitor A systematic description of the Eocene larger foraminifera recorded in the South Pyrenean Basin (Sierras Exteriores) is presented herein. The large dataset provided in this work includes Nummulites and Alveolina species, along with a variety of other porcellaneous and hyaline taxa with lesser biostratigraphic relevance. Most of the larger foraminifera described in this work correspond to the Lutetian (SBZ13 to SBZ16 biozones) interval, but late Ypresian (SBZ11, Cuisian) and early Bartonian (SBZ17) shallow benthic zones have also been identified. A new species, Idalinaosquetaensis, is described. The systematic revision of middle to late Lutetian alveolines led to a reassessment of Alveolinafusiformis and the finding of two new precursor forms, described as Alveolina aff. fragilis and Alveolina aff. elongata. The new taxa fill in the gap existing so far in the middle to late Lutetian alveolinid biostratigraphy. Despite not being exclusive to SBZ16, these forms provide realiable biostratigraphic information in facies where Nummulites are not present. This realibility lies on the correlation of Nummulitesand Alveolina biostratigraphic markers in the same sections and their calibration to the global time scale through magnetostratigraphy. Magnetostratigraphic calibration of described taxa is provided, along with an update of the SBZ calibration to the Geological Time Scale (Gradstein et al., 2012).

2021-07-26T00:00:00Z Piuz, André Vicedo, Vicent https://hdl.handle.net/2072/537934 2024-12-19T16:19:29Z 2019-08-29T00:00:00Z

New Cenomanian "nummoloculinas" of the Natih Formation of Oman Piuz, André; Vicedo, Vicent Two new genera and species of "nummoloculinas", Planinummoloculina gnosi gen. et sp. nov. and Nummoloculinodonta akhdarensis gen. et sp. nov., are described from the lower-middle Cenomanian of Oman. They are compared with other "nummoloculinas" known from the Albian to Maastrichtian of the Tethys. The mode of coiling, the number of chamber per whorl and the type of the aperture are the main distinctive criteria to separate them. Planinummoloculina gnosi gen. et sp. nov. seem to be stratigraphically and geographically very restricted, and shows very low intraspecific morphologic variability. Nummoloculinodonta akhdarensis gen. et sp. nov. is more widespread both vertically and horizontally, and shows a higher intraspecific morphologic variability.

2019-08-29T00:00:00Z