Clave dicotómica de pecopteris de las cuencas mineras de Barruelo, Palencia (Cantabriense-Barrueliense, Carbonífero Superior) y de La Magdalena León (Saberiense, Carbonífero Superior)

El género de forma Pecopteris se ha utilizado ampliamente para fósiles de hojas estériles del Carbonífero Superior y el Pérmico. El número de especies asignadas a éste género se ha ido multiplicando a lo largo de la historia debido a que las características definidas para este género son muy comunes y por tanto, aplicables a gran número de taxones. En un intento de facilitar la asignación de muestras fósiles de Pecopteris a sus respectivas especies, se ha procedido a generar sendas claves dicotómicas para las especies descritas en las cuencas de Barruelo (Palencia) y La Magdalena (León)

Plant–insect interactions from the Late Pennsylvanian of the Iberian Peninsula (León, northern Spain)

We describe new evidences of plant-insect interactions from the Late Pennsylvanian of northern Iberian Peninsula (Leon, Spain). We document nine different Damage Types (DTs) among 216 fossil plant specimens. The interactions include four different Functional Feeding Groups (FFGs), including margin feeding (DT12 and DT13), hole feeding (DT09), galling (DT33, DT80, and DT116), and oviposition (DT67, DT100, and DT102) on Pteridophytes, Pteridospermatophytes, and Coniferophytes. Margin feeding and hole feeding were identified on different species of Polymorphopteris (P. polymorpha, P. cf. pseudobucklandii, and P. integra); galling on Mixoneura wagneri, Pecopteris apicalis, and Oligocarpia gutbieri; and oviposition on Polymorphopteris integra, Cordaites cf. angulostriatus and Polymorphopteris cf. integra. The oviposition scars represent the oldest record of oviposition from the Iberian Peninsula so far. In addition, it is the first evidence of plant-insect interactions on Oligocarpia and Polymorphopteris leaves in the area. These evidences reveal various ecological interactions between different groups of plants and insects in the Late Pennsylvanian forests of Spain, suggesting that these plants were a relevant source of food and lodge for a variety of arthropods (mainly insects). We also explore the possible culprits of these damages and the climatic implications.We appreciate the "Asociacion Paleontologica Alcarrena Nautilus" for the support received during the sampling works in open-cast mines in Leon. This work was supported by the project GRC2019/028 (ED431C-2019/28) of the Galician Government. Artai Santos is supported by a predoctoral fellowship from the Galician Government (Department of Culture, Education and University Planning) co-financed by the European Social Fund (Ref: ED481A-2019/243). Funding for open access charge: Universidade de Vigo/CISUG. We also thank the editors, Dr. Esther Pinheiro, and one anonymous reviewer for the constructive suggestions that have helped to improve the manuscript. All the samples are in the Museo de Ciencias Naturales de Alava (MCNA)

Late Carboniferous ecosystems in the NW Iberian Peninsula: plants, arthropods, and plant-arthropod interactions

Congreso realizado en Valencia del 4 al 7 de octubre de 2023.Peer reviewe

Discovery of the First Blattinopsids of the Genus Glaphyrophlebia Handlirsch, 1906 (Paoliida: Blattinopsidae) in the Upper Carboniferous of Southern France and Spain and Hypothesis on the Diversification of the Family

International audienceGlaphyrophlebia victoiriensis sp. nov. (Paoliida: Blattinopsidae) is the third Gzhelian representative of the genus and is described based on a beautiful forewing from the Var department in Southern France. Together with the description of another forewing fragment of a Glaphyrophlebia sp. from the Province of León in NW Spain, they improve our knowledge of fossil insects from French and Spanish upper Carboniferous deposits. The specimen of Glaphyrophlebia sp. is the first mention of the family in the Carboniferous of Spain and extends the geographical distribution of the genus. These descriptions suggest that the genus Glaphyrophlebia was speciose during the Upper Pennsylvanian, while otherwise very diverse in the lower and middle Permian strata of the Russian Federation. We proposed the first hypothesis to explain the diversification of the family and of its most speciose genera and to argue that their diversity dynamics were likely linked with the major environmental changes that followed the collapse of the Carboniferous rainforest, notably the extension of arid biomes during the Permian period. The exquisite preservation and the fineness of the sediment from Tante Victoire, in which the new species was found, suggests that the locality is suitable for preserving other fossil insects and will require additional investigations

The First Representative of the Roachoid Family Spiloblattinidae (Insecta, Dictyoptera) from the Late Pennsylvanian of the Iberian Peninsula

Sysciophlebia ‘sp. form Villablino’, the first Iberian representative of the Palaeozoic–Early Mesozoic family Spiloblattinidae, is described and illustrated. Its forewing colour pattern is strongly similar to those of the Gzhelian–early-middle Asselian species Sysciophlebia euglyptica, Sysciophlebia ilfeldensis, Sysciophlebia rubida, and ‘Sysciophlebia sp. form KBQ’, supporting the currently proposed Gzhelian age for its type locality. It supports the use of the representatives of the Spiloblattinidae for stratigraphic purposes. The diagnoses and limits of the families Subioblattidae, Phyloblattidae, Compsoblattidae, Spiloblattinidae, and of the spiloblattinid genera are discussed

Field experiments in the Brazil-Malvinas Confluence during early austral fall

Joint Assembly IAPSO-AIAMA-IAGA , Good Hope for Earth Sciences, 27 August - 1 September 2017, Cape Town, South AfricaWe present the results of two field experiments carried in early austral fall over the Brazil-Malvinas Confluence (BMC) onboard the R/V Hespérides, each approximately lasting two weeks. The first experiment (March 2015) began encircling the BMC with hydrographic stations (lowered ADCP, CTD and water samples) along a perimeter of about 1200 km, in order to identify the water masses and fluxes reaching the BMC, and then sampled the collision region with six 100-km long and 400-m deep cross-frontal hydrographic sections. Data was also obtained from the vessel ADCP (velocities down to about 600 m), eight subsurface drifters and nine Argo floats. Here we describe the fluxes and structure of the BMC at three different scales: frontal, confluence and regional. The frontal sampling, approximately comprising a 200 km x 100 km region, shows intense cross-frontal property gradients (e.g. up to 20ºC in about 10 km at 50 m depth), numerous thermohaline intrusions (10-100 m thick, 10 km wide and 10-50 km long) and a very shallow (5-20 m) and fast (velocities close to 1.8 m/s) eastward surface brackish (salinities of 32-33) filament on the warm side of the front (narrowing from some 100 km over the slope to only a few kilometers in the outer stations). The confluence sampling followed the border of a 400 km x 200 km rectangle that encompassed the entire collision of the two impinging currents, characterized by large water recirculation in adjacent vortices (two anticyclones and one cyclone at distances less than 500 km from the collision point) before the eastward flushing along the frontal system. Finally, we used the ARMOR3D fields (Guinehut et al., 2012, Ocean Sci. 8, 845-857) to characterize the regional flow patterns and water masses, from 31ºS to 45ºS and from 38ºW to the continental platform. The second experiment (April 2017) will focus on the temporal and latitudinal evolution of the frontal system. It will include hydrographic and microstructure stations, the deployment of drifters and floats, and a towed vehicle to sample the uppermost 400 m of the water columnPeer Reviewe