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Language Spanish journal of palaeontology. 2015. Vol. 30, no. 2
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- Re-assessment of the type collections of Maslov's species of Hapalidiales (Rhodophyta). Species originally attributed to Lithothamnium, Mesophyllum and Palaeothamnium(2020) Braga, Juan C; Bassi, Davide; Aguirre, Julio; Zakrevskaya, Elena; Radionova, Éleonora PThis is the third and last paper of a series devoted to the revision of the types of the species and infra-specific taxa of coralline red algae established in two monographs by Maslov. Maslov’s new species and intraspecific taxa were separated by characters of questionable significance from a modern taxonomic point of view. In this study, as un previous contributions, a number of types of fossil coralline algae Maslov’s original collection are re-assessed with a modern morpho-anatomic taxonomic approach. This paper deals in particular with the types of species attributed of Maslov to the genera Lithothamnion (as Lithothamnium), Mesophyllum and Palaeothamnium (Hapalidiales, Rhodophyta). According to our reassessment, only the type of Mesophyllum schenckii var. corticesum can be confidently assigned to a currently accepted genus within the family Hapalidiaceae, subfamily Melobesioideae. The types of Lithothamnion iorii, Palaeothamnium kassovense, Mesophyllum kutense, Lithothamnion microcellulosum, Lithothamnion praefructiculosum, and Lithothamnion thcernomoricum possess multiporate conceptacles and non-coaxial ventral core and can be attributed to the subfamily Melobesioideae. The lack of ephitallial cells, however, prevents any precise generic assignment within the Lithothamnion, Phymatolithon, Clathtomotphum and Synarthrophyton complex. Finally, the lack of significant characters prevents any confident attribution of the type of “Lithothamnion saxorum var. korolukae” to any defined generic or suprageneric taxon within the Hapalidiales or the Corallinales. The absence of reproductive structures int ye types of “Lithothamnion caucasicum”, “Lithothamnion (?) intergeminum” and “Lithothamnion (?) suhumii” prevents the placement of these taxa in any order and family within Hapalidiales, Corallinales or Sporolithales
- Large ungulates from the basal Oligocene of Oman: 2 - Proboscidea(2020) Pickford, MartinKnowledge about the Palaeogene fossil record of the Arabian Peninsula has improved recently due to discoveries of Eocene – Oligocene age in Oman and Saudi Arabia. In the early 1990’s primitive proboscideans were listed from Thaytiniti (Early Oligocene) in Oman, but the fossils were never described. Subsequently a proximal unla from the Dhofar was attributed to an arsinoitheres, but it is more likely to belong to a proboscidean than an embrithopod. Recently a lower jaw from the same region was described as the barytheriid Omanitherium. The present paper describes and illustrates the fossils collected at Thaytiniti and Taqah in 1992 and identifies them as the first known upper teeth of Omanitherium. The significance of these fossils for understanding the taxonomy and systematics of Omanitherium are discussed, and it is concluded that among all the known Proboscidea, this genus is most closely related to Arcanotherium from the Eo-Oligocene of Dor el Talha, Libya
- Una nueva asociación de dientes de vertebrados para la Formación Bajo de la Carpa (Santoniense, Cretácico Superior) en Rincón de los Sauces, Neuquén, Argentina(2020) Filippi, Leonardo S; Martinelli, Agustín G; Garrido, Alberto CEn el presente trabajo se da a conocer una nueva asociación de dientes de la Formación bajo de la Carpa (Santoniense, Cretácico Superior) en un contexto paleoambiental diferente a las registradas en los alrededores de la ciudad de Neuquén y Paso Córdova (Patagonia, Argentina). Esta nueva asociación está integrada por dientes aislados de Dipnoi de las especies Ceratodus kaopen y Atlantoceratodus patagonicus; dientes de Mesoeucrocrodylia, pertenecientes a Peirosauridae; dientes de terópodos Abelisauridae y dientes de saurópodos Titanosauria. Los especímenes de Mesoeucrocrodylia, Abelisauridae y Titanosauria son consistentes con el registro fósil de la región, representado por la asociación de tetrápodos del Coloradoense para el intervalo Santoniense-Campaniense temprano. Sin embargo, el dipnoo A. patagonicus representa la primera ocurrencia para la Formación Bajo de la Carpa, siendo su registro el más antiguo para ese taxón
- Paleocene agglutinated foraminifera from Jabal Mundassa, Al Ain area, United Arab Emirates(2020) Anan, Haidar SalimThe Paleocene succession of Jabal Mundassa, Al Ain area, United Arab Emirates (UAE) contains prolific and well-preserved species of agglutinates, planktic and calcareous benthic foraminifera at the Danian/Selandian (D/S) transition. This succession is considered as the only one that has Danian sediments in the Al Ain area. The present study is deals with the taxonomy, palaeogeography and stratigraphic distribution of twenty-six agglutinated benthic species at Jabal Mundassa and other Paleocene outcrops localities in the Tethys
- Large ungulates from the basal Oligocene of Oman: 3 - Anthracotheriidae(2020) Pickford, MartinThe presence of Anthracotheriidae, Artiodactyla, Mammalia, in the Early Oligocene of Oman was reported in 1992, but the fossils were never described. This paper rectifies the situation by describing two teeth that can be attributed to Bothriogenys gorringei, a species that is common in the Eocene-Oligocene Fayum deposits, Egypt. The Omani fossils hel to fill a geographic gap that used to exist between the Fayum species on the one hand, and anthracothere species from the Far East on the other. The material consists of an upper molar from Thaytiniti and half a lower molar from Taqah
- Application of digital image treatment to the characterization and differentiation of deep-sea ichnofacies(2020) Dorador, Javier; Rodríguez-Tovar, Francisco JThe ichnofacies model proposed by Seilacher in the 1960’s stands as one of the main tools used in the ichnological research. Based on the integration of numerous ichnological and sedimentological observations, it entails a precise characterization of the trace fossil assemblage. Differentiation of trace fossils may be relatively easy in outcrops, but cores are a different matter, particularly modern marine cores. Difficulties are even more accentuated in deep-sea pelagic and hemipelagic, non-turbiditic, fine-grained deposits. The application of digital image treatment can facilitate trace fossil identification and improve deep-sea ichnofacies characterization on modern cores. The method proposed here was applied to cores from the IODP Expedition 339 (Site U1285). Eight ichnotaxa – Chondrites, Palaeophycus, Phycosiphon, Planolites, Taenidium, Thalassinoides, Thalassinoides-like structures and Zoophycos – as well as some horizontal grouped circular structures interpreted as trails (?Nereites) were recognized. The archetypical Zoophycos ichnofacies is identified, but characteristic elements belonging to the Nereites ichnofacies and to the distal expression of Cruziana ichnofacies are locally recognized. Thus, the applied methodology allows differentiating between different expressions of the Zoophycos ichnofacies and to approach subtle changes in the involved environmental parameters affecting tracemakers
- Fossil assemblages and biostratigraphy of metamorphic rocks of the Nevado-Filábride Complex from the Águilar tectonic arc (SE Spain)(2020) Laborda-López, Casto; Aguirre, Julio; Donovan, Stephen K; Navas-Parejo, Pilar; Rodríguez, SergioAbundant marine macrofossils are present in graphitic marbles and calc-silicate schists belonging to the Veleta nappe of the Nevado-Filábride Complex (Internal Zones of the Betic Cordillera, SE Spain), in what is called the Águilas tectonic arc. These fossils have resisted metamorphism and deformation, and in some instances have been finely preserved. The fossil assemblages are dominated by crinoids, followed by minor cephalopods, brachiopods, rugose corals, and putative sections of trilobites. In addition to these confidently identified groups, there are other fossil represented, but deformation and extensive recrystallization have destroyed anatomical characters, hampering their taxonomic identification. Among the crinoids, the columnal parataxa Pentagonopentagonalis (col.) and Bystrowicrinus (col.) have been recognized. Planispiral cephalopods assigned to either primitive ammonoids attributable to the order Agniatitid (one of them being a possible member of the family Mimosphinctidae) or coiled nautilids, as well as orthoconid sections of possible orthoceratids or bactritids are present. Finally, there are rugose coral attributable to the family Phillipsastreidae, possibly Peneckiella. Among the remains with obscure taxonomic assignment, we recognize possible laminar calcareous algae an benthic foraminifers Finally, irregular, massive structures showing a rough laminar organization and longitudinal tubes with rounded sections are found in some black marble beds. These can be identified either as possible chaetetids or bryozoans. The report of these taxa has limited the rocks studied to the Emsian, late Early Devonian
- Updating titanosaurian diversity (Sauropoda) from the Late Cretaceous of Spain: the fossil sites of Laño and Chera(2020) Díez-Díaz, Verónica; Pereda Suberbiola, Xabier; Company, JulioThree titanosaurian sauropods are well-known from the Campanian-Maastrichtian of the Ibero-Armorican Island (southwestern Europe): Lirainosaurus astibiae from Spain, and Ampelosaurus atacis and Atsinganosaurus velauciensis from France. However, a higher titanosaurian diversity has been suggested for this island, a hypothesis that has gained traction in recent years as a result of new discoveries in fossil sites from Spain and southern France. An estimation of the titanosaurian diversity in the late Campanian-early Maastrichtian of the Iberian Peninsula is made here on the basis of the available information from the three fossil sites that have yielded the best preserved fossil remains: Laño (Condado de Treviño), Chera (Valencia), and Lo Hueco (Cuenca). The results confirm the hypothesis of a higher titanosaurian diversity in the Iberian Peninsula: from one to, at least, three taxa. Moreover, we also suggest the presence of two different titanosaurian morphotypes in the site of Chera, with one of them representing Lirainosaurus
