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Caus E.,Autonomous University of Barcelona | Parente M.,University of Naples Federico II | Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Frijia G.,University of Potsdam | Martinez R.,Autonomous University of Barcelona
Cretaceous Research | Year: 2013

The Upper Cretaceous shallow-water carbonates of the Pyrenean Basin (NE Spain) host rich and diverse larger foraminiferal associations which witness the recovery of this group of protozoans after the dramatic extinction of the Cenomanian-Turonian boundary interval. In this paper a new, large discoidal porcelaneous foraminifer, Broeckina gassoensis sp. nov., is described from the middle Coniacian shallow-water deposits of the Collada Gassó Formation, in the Bóixols Thrust Sheet. This is the first complex porcelaneous larger foraminifer of the Late Cretaceous global community maturation cycle recorded in the Pyrenean bioprovince. It differs from the late Santonian-early Campanian B.dufrenoyi for its smaller size in A and B generations and the less developed endoskeleton, which shows short septula. Broeckina gassoensis sp. nov. has been widely employed as a stratigraphic marker in the regional geological literature, under the name of ". Broeckina", but its age was so far controversial. Its middle Coniacian age (lowermost part of the Peroniceras tridorsatum ammonite zone), established in this paper by strontium isotope stratigraphy, indicates that it took about 5My after the Cenomanian-Turonian boundary crisis to re-evolve the complex test architecture of larger foraminifera, which is functional to their relation with photosymbiotic algae and K-strategy. © 2013 Elsevier Ltd.


Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Caus E.,Autonomous University of Barcelona | Frijia G.,University of Potsdam
Journal of Systematic Palaeontology | Year: 2013

Architectural analysis of the Late Cretaceous alveolinaceans of the Caribbean palaeobioprovince has made it possible to separate four genera: Praechubbina, Chubbinella gen. nov., Chubbina and Caribalveolina. The first three genera belong to the family Rhapydioninidae, while the fourth is placed in the family Alveolinidae. Two species, Praechubbina breviclaustra and P. oxchucensis sp. nov., represent the primitive genus Praechubbina, while the species cardenasensis and obesa, previously ascribed to this genus, must be reassigned respectively to Chubbinella gen. nov. and Caribalveolina. The species Chubbina jamaicensis, C. macgillavryi and C. fourcadei sp. nov. complete the inventory of Chubbina. The alveolinid genus Caribalveolina comprises two species, C. obesa and C. michaudi. Caribbean alveolinaceans include two successive assemblages. The lower assemblage is characterized by Praechubbina oxchucensis, P. brevisclaustra, Chubbinella cardenasensis and Caribalveolina obesa. The upper assemblage is represented by the genus Chubbina, with C. fourcadei, C. jamaicensis and C. macgillavryi, and Caribalveolina michaudi. The age of the lower assemblage is uncertain (probably Late Campanian-Early Maastrichtian), while the upper assemblage has been dated by strontium isotope stratigraphy as Late Maastrichtian. © 2013 Natural History Museum.


Piuz A.,Museum dhistoire naturelle de la ville de Geneva | Meister C.,Museum dhistoire naturelle de la ville de Geneva | Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia
Cretaceous Research | Year: 2014

The first alveolinoidean appearing in the Cenomanian Natih Formation of Oman (Adam foothills and southern edge of Jabal Akhdar) are studied in detail. Morphological analysis results in the creation of one new family, Myriastylidae, two new genera, Myriastyla and Alveocella, and four new species, M.omanensis, M.grelaudae, A.wernliana, and Cisalveolina nakharensis. These four new taxa have a short stratigraphic extension restricted to the uppermost part of Natih E unit and are dated early middle Cenomanian by neighboring foraminifers and ammonite levels. © 2014 Elsevier Ltd.


Robles-Salcedo R.,Autonomous University of Barcelona | Rivas G.,Institute Geologic Of Catalonia | Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Caus E.,Autonomous University of Barcelona
Palaios | Year: 2013

This study examines the distribution of larger foraminifera in an upper Campanian-lower Maastrichtian siliciclastic-carbonate depositional environment within the Arén Sandstone Formation. Three assemblages have been identified, which refer to prodelta, reef, and lagoon depositional facies. Prodelta deposits are characterized by Lepidorbitoides socialis, Lepidorbitoides aff. minor, Clypeorbis mammillata, and Siderolites cataluniensis. The reef deposit assemblage contains Siderolites calcitrapoides, Siderolites cataluniensis, Orbitoides gruenbachensis, "Orbitoides" aff. concavatus, Lepidorbitoides aff. minor, and Fallotia jacquoti. They are associated with the encrusting foraminifera Solenomeris and Haddonia. The lagoonal assemblage contains Fascispira colomi and Omphalocyclus macroporus. Among the siderolitids, the keeled saucershaped Siderolites cataluniensis colonized the deepest environments at the lower photic zone, whereas the canaliculate spine-bearing Siderolites calcitrapoides characterized shallower waters. The former lived on soft media of calm environments whereas the latter crawled on firmground of high-energy environments. Lepidorbitoides socialis shared with Siderolites cataluniensis and Clypeorbis mammillata the deepest, calm environments, while Lepidoritoides aff. minor adapted to a wide range of depths in low to moderate water-energy environments. Orbitoides gruenbachensis and "Orbitoides" aff. concavatus colonized the firm media in the upper photic zone, whereas Omphalocyclus macroporus was an epiphyte in soft media in areas with a moderate-energy water. The meandropsinids occupied the upper photic zone; the odd pair Fallotia jacquoti and Eofallotia simplex colonized high-energy environments, whereas their relative Fascispira colomi adapted to shallow, calm environments. The structure of the assemblages of larger foraminifera described in this paper provides a useful tool for the reconstruction of the Late Cretaceous shallow-water fauna in mixed siliciclastic-carbonate environments. © 2013, SEPM (Society for Sedimentary Geology).


Serra-Kiel J.,University of Barcelona | Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Razin P.,University of Bordeaux 1 | Grelaud C.,University of Bordeaux 1
Geologica Acta | Year: 2016

The larger foraminifera of the lower part of the Jafnayn Formation outcropping in the Wadi Sayq, in the Paleocene series of the eastern Oman Mountains, have been studied and described in detail. The analysis have allowed us to develop a detailed systematic description of each taxa, constraining their biostratigraphic distribution and defining the associated foraminifera assemblages. The taxonomic study has permitted us to identify each morphotype precisely and describe three new taxa, namely, Ercumentina sayqensis n. gen. n. sp. Lacazinella rogeri n. sp. and Globoreticulinidae new family. The first assemblage is characterized by the presence of Coskinon sp., Dictyoconus cf. turriculus Hottinger and Drobne, Anatoliella ozalpiensis Sirel, Ercumentina sayqensis n. gen. n. sp. Serra-Kiel and Vicedo, Lacazinella rogeri n. sp. Serra-Kiel and Vicedo, Mandanella cf. flabelliformis Rahaghi, Azzarolina daviesi (Henson), Lockhartia retiata Sander, Dictyokathina simplex Smout and Miscellanites globularis (Rahaghi). The second assemblage is constituted by the forms Pseudofallotella persica (Hottinger and Drobne), Dictyoconus cf. turriculus Hottinger and Drobne, Lacazinella rogeri n. sp. Serra-Kiel and Vicedo, Azzarolina daviesi (Henson), Keramosphera? cf. iranica Rahaghi, Lockhartia haimei (Davies), Lockhartia retiata Sander, Sakesaria trichilata Sander, Kathina delseota Smout, Elazigina harabekayisensis Sirel, Daviesina khatiyahi Smout, and Miscellanea juliettae Leppig. The first assemblage can be considered to belong to the Shallow Bentic Zone SBZ2 (early Selandian age), and the second assemblage to the SBZ3 (late Selandian-early Thanetian age).This paper shows, for the first time in the Middle East area, a correlation between the Selandian larger foraminifera and planktonic foraminifera biozones. © 2016 Universitat de Barcelona. All rights reserved.


Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Berlanga J.A.,PEMEX | Serra-Kiel J.,University of Barcelona
Carnets de Geologie | Year: 2014

The larger foraminifera found in the material from the Chichen Itzá Formation of Campeche (SE Mexico) were studied in detail. The architectural analyses allow the description of four new species and a new genus, namely, two agglutinated conical foraminifera, Coskinolina yucatanensis n.sp. and Pseudofallotella drobneae n. gen. n.sp., one new alveolinid, Borelis hottingeri n.sp., and one new rota-liid, Dictyoconoides boneti n.sp. The larger foraminifera of the Chichen Itzá Formation are distributed across two different associations: one includes Pseudofallotella drobneae, Neotaberina sp., Rhabdorites sp., Borelis hottingeri, Dictyoconoides boneti, Kathina sp., Miscellaneidae, Ranikothalia soldadensis and Hexagonocyclina cristensis, while the other assemblage is composed of Coskinolina yucatensis, Fallotel-la causae, Rhabdorites sp., Borelis floridanus and Cincoriola cf. ovoidea. Some of these genera, inclu-ding Neotaberina and Dictyoconoides, are cited in the Caribbean paleobioprovince for the first time in this paper. The first association is dated as Thanetian (SBZ 3? to SBZ 4) by the presence of Ranikotha-lia soldadensis. Though the age of the second association remains uncertain, a similar age has been in-ferred.


Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Berlanga J.A.,PEMEX | Serra-Kiel J.,University of Barcelona | Caus E.,Autonomous University of Barcelona
Journal of Foraminiferal Research | Year: 2013

This paper revises the architecture of the Paleocene foraminiferal genus Taberina based on reexamination of the type species, T. cubana, from Cuba, supplemented by specimens collected from the Lacandón Formation of SE Mexico. Taberina shells exhibit an initial subglobular shape, later becoming conical to peneropliform. They have multiple apertures and the stolon axes follow a radial pattern. Structural elements consist of septula situated in the peripheral part of the chamber lumen and thick, irregularly shaped pillars located in the central part. The architecture of typical Taberina differs from those of other "taberinas" described from the Middle East, such as the Cenomanian "T". bingistani and Paleocene "7." daviesi, both of which must be removed from the genus. Other taxa of larger benthic foraminifers found in the Lacandón Formation include: Ranikothalia bermudezi, "Quasiborelis" floridanus, Rhabdoritesl sp., Praerhapydionina sp., Miscellanea? nassauensis, Neomurciella cf. N. butterlini, Raadshoovenia guatemalensis, and rotaliids. The age of T. cubana is Paleocene SBZ 2 and SBZ 3, and the species is known only from the Caribbean/American paleobioprovince.


Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Serra-Kiel J.,University of Barcelona
Journal of Foraminiferal Research | Year: 2015

A deep architectural analysis of the Paleocene, porcelane- ous larger foraminifera Taberina daviesi Henson, 1950 has been conducted for the first time, which has permitted clarification of its generic taxonomic attribution and a more accurate assessment of its palaeobiogeographical and bio- stratigraphical distributions. The crosswise oblique pattern followed by the stolon axes in T. daviesi differs from the radial pattern showed in the type species of the genus Taberina, T. cubana Keijzer, 1945. Moreover, differences in the embryonic architecture and the type of growth and final test shape between these species support a change in the generic taxonomic attribution. Thus, a new genus, Azzar- olina, is proposed for the former species. Azzarolina daviesi is a common biostratigraphic marker for the Paleocene with a broad distribution in the Arabian Peninsula and surrounding areas.


Gonzalez-Fernandez B.,University of Oviedo | Menendez-Casares E.,University of Oviedo | Vicedo V.,Museu de Ciencies Naturals de Barcelona Paleontologia | Aramburu C.,University of Oviedo | Caus E.,Autonomous University of Barcelona
Journal of Iberian Geology | Year: 2014

Detailed mapping of the Jurassic to pre-Albian deposits of central and eastern Asturias (NW of the Iberian Peninsula) allowed several Upper Jurassic and Lower Cretaceous outcrops, previously assigned to other ages, to be identified. Where possible, these outcrops were correlated with the well-known sequences outcropping on the Asturian coast. A new Jurassic stratigraphic unit, the Miyares Formation, was defined, consisting of a conglomerate Lower Unit, a Middle Unit composed mainly of oolitic limestones and an Upper Unit comprising bioclastic and marly limestones with a rich larger foraminiferal fauna. The Lower Unit is interpreted as deposited in a fan delta, the Middle Unit represents a shallow marine high-energy environment, and the Upper Unit deposited on a restricted shallow marine platform. The shallow-water foraminiferal assemblage from the Upper Unit is attributed to the Tithonian and the oldest Cretaceous rocks are Barremian. Therefore, there is a stratigraphic gap recorded in the study area, which might correspond to the latest Jurassic to Early Cretaceous pro parte timespan. © 2014, Universidad Complutense de Madrid. All rights reserved.

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