Fernanda Cabrera - Academia.edu (original) (raw)

Papers by Fernanda Cabrera

Journal of Fish Biology

The morphology of otoliths determines the function they perform, and it is influenced by genetic ... more The morphology of otoliths determines the function they perform, and it is influenced by genetic and environmental factors. Knowing those relationships is necessary to understand the role of hearing in fish. The objectives of this work were: exploring the shape of the sulcus of the sagittal otolith in seven species of Sciaenidae, in relation to sound production, and analyzing whether the shape and size of the sulcus can be used as a phylogenetic character. For this purpose, geometric morphometry analysis was carried out using landmarks data. It was found that there is an influence of size on the shape of the sulcus, and significant differences were found between the shapes of the sulcus (permutational multivariate analysis of variance). Three general shapes of the sulcus were identified (using principal component analysis, canonical variate analysis, and clustering): (1) in species that produce sounds at dominant frequencies <350 Hz, the deformation of the sulcus showed a tendenc...

A new material of a Quaternary waterfowl is described here. The implications of this finding, in ... more A new material of a Quaternary waterfowl is described here. The implications of this finding, in the context of the dispersal of Anatidae in the past, are discussed. The specimen consists in a partial humerus coming from the Upper Pleistocene of austral Chaco from Santiago del Estero Province, Argentina. The specimen here described belongs to the tribe Cygnini, being larger than most members of the clade. The humerus shows different size than with other members of the tribe Cygnini, being larger than the humeri referred to the Andean goose (Oressochen melanopterus), the Sheldgeese of the genus Chloephaga, the Comb Duck (Sarkidiornis sylvicola), and larger than the Ruddy Shelduck (Tadorna ferruginea). However, the humerus have several anatomical characters indicating that it belongs to a basal anserine duck. These combinations of features allow us to assign this fossil to a species of waterfowl: Coscoroba coscoroba. This finding, it context with the history of the South American Cygn...

Annales de Paléontologie, 2020

Adequate values of environmental parameters are crucial for the long-term preservation of the fos... more Adequate values of environmental parameters are crucial for the long-term preservation of the fossils in a palaeontological collection. In particular, incorrect or fluctuating temperature (T) and relative humidity (RH) can affect glued or repaired materials, induce the proliferation of mould, provoke mechanical breakage, recrystallization or mineral decay. From April 2015 to March 2017, six hygrothermometers were incorporated in selected microenvironments of the Palaeontological Collection at the

Upon interaction with immobilized antigens B cells form an immune synapse, where actin remodeling... more Upon interaction with immobilized antigens B cells form an immune synapse, where actin remodeling and re-positioning of the microtubule-organizing center (MTOC) together with lysosomes can facilitate antigen extraction. B cells have restricted cytoplasmic space, mainly occupied by a large nucleus, yet the role of nuclear morphology in the formation of the immune synapse has not been addressed. Here we show that, upon activation, B cells re-orientate and adapt the size of their nuclear groove facing the immune synapse, where the MTOC sits and lysosomes accumulate. Silencing nuclear envelope proteins, Nesprin-1 and Sun-1, impairs nuclear reorientation towards the synapse and leads to defects in actin organization at this level. Consequently, B cells are unable to internalize the BCR after antigen activation. Nesprin-1 and Sun-1-silenced B cells also fail to accumulate the tethering factor Exo70 at the center of the synaptic membrane and display defective lysosome positioning, impairin...

Journal of Research in Pharmacy, 2022

How to cite this article: Razuc MF, Cabrera FA, Garrido ME, Ramirez-Rigo MV. New reliable and rap... more How to cite this article: Razuc MF, Cabrera FA, Garrido ME, Ramirez-Rigo MV. New reliable and rapid HPLC method for the simultaneous determination of amoxicıllin and sulbactam pivoxil in pharmaceutıcals. Application to both assay and dissolution samples.

Topics in Geobiology, 2019

The use of alien invasive species is applied for the first time to evaluate the taphonomic damage... more The use of alien invasive species is applied for the first time to evaluate the taphonomic damage during a period of up to two decades, in natural conditions. A preliminary study using shells of the gastropod Rapana venosa collected in a microtidal beach showed that the specimens suffered important damage in the considered time span, comparable with the one registered in presumably older shells.

espanolEl presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Nari... more espanolEl presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con muestras de suelo tomadas en dos lotes (L1 y L2) de la granja experimental Botana, los cuales se caracterizan por ser suelos Andisoles que presentan una textura franco arcillosos con historiales muy diferentes desde el punto de vista de manejo, L1 es utilizado bajo un arreglo agroforestal con rotacion de cultivos y L2 ha permanecido bajo pastura con arboles dispersos.Este trabajo consistio en estandarizar el metodo Kononova-Belchikova para la extraccion y fraccionamiento de sustancias humicas (SH) y ademas adaptar una metodologia para la purificacion y analisis de dichas sustancias, para lo cual fue necesario realizar modificaciones a los protocolos originales. Para el analisis de las SH se utilizo la relacion E4/E6 la cual depende de los tamanos, pesos moleculares y grado de condensacion de los acidos humicos (AH) y ^ los acidos fulvicos (AF) obtenidos de las diferentes muestras...

In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the L... more In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the Late Cretaceous of the Norte Basin, whose record is formed by predominantly siliciclastic continental fossiliferous sedimentary rocks. A factor that contributed to the terminology proliferation was the misplaced importance attributed to the epigenetic processes and products (calcretes and ferricretes, occasionally fossiliferous) affecting those siliciclastic rocks. Based on field work and lithological logs from a number of key areas, the validity of the original stratigraphic column showing, from base to top, the Guichon, Mercedes, Asencio and Queguay formations is supported. For those particular units, the lithostratigraphic scope given by the original definitions is correct and, with minimum adjustments, they should be restored for their practical usefulness as geological mapping units. An evolutionary scheme for the Late Cretaceous of the Norte Basin is herein presented, with the aim o...

A new species of Pupoides Pfeiffer 1854, subgenus Ischnopupoides Pilsbry 1926, is described for t... more A new species of Pupoides Pfeiffer 1854, subgenus Ischnopupoides Pilsbry 1926, is described for the Late Cretaceous of Uruguay (Queguay Formation), being the oldest record of the genus and subgenus. Pupoides (I.) gnocco new species is characterized by a small dextral fusiform shell, constituted by a spire comprising five slightly convex whorls, oblicuous axial ornamentation, subrounded aperture, and an expanded outer lip that lacks dentition.

Actualistic Taphonomy in South America, 2020

In the Southern Brazil Shelf (SBS), surface bioclastic concentrations are associated with putativ... more In the Southern Brazil Shelf (SBS), surface bioclastic concentrations are associated with putative paleo-shorelines formed where wave ravinement surfaces are probably present. From the late Last Glacial Maximum, the SBS can be considered a sediment-starved passive margin continental shelf, with its morphostructural development fairly known. There, fourteen molluscan shell samples from near shelf-break deposits (“distal shell-rich”), eleven from proximal, low depth bioclastic deposits (“proximal shell-rich”) and ten samples from sandy substrate (“shell-poor”) were evaluated for taphonomic damage accordingly to updated protocols. Multivariate statistical analysis showed significant differences between the three groups of shelly samples. Low-intensity damage states (such as natural bright and ornamentation) dominate samples from the distal shell-rich deposit, whereas the inverse occurs in the proximal deposit (samples from the shell-poor locations present an intermediate damage pattern...

Las “Calizas del Queguay”, aflorantes en Uruguay en la Cuenca de Santa Lucia y sector correspondi... more Las “Calizas del Queguay”, aflorantes en Uruguay en la Cuenca de Santa Lucia y sector correspondiente de la Cuenca de Parana, y marginalmente en el litoral de la Mesopotamia Argentina, son depositos rocosos esencialmente carbonaticos que resultan de energicos procesos de calcretizacion–silcretizacion pedogenicos y de aguas subterraneas, palustres o inclusive, lacustres segun algunos autores. Los procesos de calcretizacion se habrian producido en el Cretacico Tardio y se intercalaron o sobreimpusieron a cualquier roca aflorante o subaflorante en ese tiempo, mayormente cretacicas, pero tambien precambricas y devonicas. Los procesos de silicificacion, en cualquier caso, se dan sobre las calizas con diferentes intensidades y si bien puede haber mas abundancia de silcretas en algunas zonas allende al Rio Uruguay, la silicificacion es un atributo que se observa en toda la extension de esta unidad. Por el momento no es posible discriminar proveniencias de muestras de mano o artefactos pr...

El presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con... more El presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con muestras de suelo tomadas en dos lotes (L1 y L2) de la granja experimental Botana, los cuales se caracterizan por ser suelos Andisoles que presentan una textura franco arcillosos con historiales muy diferentes desde el punto de vista de manejo, L1 es utilizado bajo un arreglo agroforestal con rotacion de cultivos y L2 ha permanecido bajo pastura con arboles dispersos. Este trabajo consistio en estandarizar el metodo Kononova-Belchikova para la extraccion y fraccionamiento de sustancias humicas (SH) y ademas adaptar una metodologia para la purificacion y analisis de dichas sustancias, para lo cual fue necesario realizar modificaciones a los protocolos originales. Para el analisis de las SH se utilizo la relacion E4/E6 la cual depende de los tamanos, pesos moleculares y grado de condensacion de los acidos humicos (AH) y ^ los acidos fulvicos (AF) obtenidos de las diferentes muestras. Tamb...

Journal of Molluscan Studies, 2021

ABSTRACTIn the Late Cretaceous fossil record of Uruguay, three morphotypes of Bulimulus (Bulimuli... more ABSTRACTIn the Late Cretaceous fossil record of Uruguay, three morphotypes of Bulimulus (Bulimulidae) have been recorded: Bulimulus klappenbachi and two undescribed ones. A geometric morphometric analysis was conducted to show whether the three morphotypes represent one or more species. With this aim, the three fossils were compared with three extant species of the same genus: Bulimulus bonariensis, B. guadalupensis and B. rushi. Variability within and among these three well-known extant species was tested to evaluate differences in the fossil morphotypes. Twenty-eight landmarks were selected (9 permanent landmarks and 19 semi-landmarks) and principal component analysis and canonical variate analysis were performed. Results indicate that only one of the unnamed morphotypes can be described as a new species and that the other is a variant of B. klappenbachi. The latter fossil species is described as Bulimulus frenguellii n. sp.

Geosciences = Geociências, 2019

In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the L... more In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the Late Cretaceous of the Norte Basin, whose record is formed by predominantly siliciclastic continental fossiliferous sedimentary rocks. A factor that contributed to the terminology proliferation was the misplaced importance attributed to the epigenetic processes and products (calcretes and ferricretes, occasionally fossiliferous) affecting those siliciclastic rocks. Based on field work and lithological logs from a number of key areas, the validity of the original stratigraphic column showing, from base to top, the Guichón, Mercedes, Asencio and Queguay formations is supported. For those particular units, the lithostratigraphic scope given by the original definitions is correct and, with minimum adjustments, they should be restored for their practical usefulness as geological mapping units. An evolutionary scheme for the Late Cretaceous of the Norte Basin is herein presented, with the aim o...

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2018

The South American fossil record of pulmonate gastropods counts with circa 100species from the Cr... more The South American fossil record of pulmonate gastropods counts with circa 100species from the Cretaceous to the Pliocene. As this knowledge is largely scattered in the literature, we present here a checklist of these fossils, with relevant data about each species’ type locality, stratum and age, and illustrating the type specimens whenever possible. Moreover, some taxonomical problems are highlighted in the hope of garnering attention for future research.Fil: Salvador, Rodrigo B.. Museum of New Zealand Te Papa Tongarewa; Nueva ZelandaFil: Cabrera, Fernanda. Universidad de la República. Facultad de Ciencias; UruguayFil: Martínez, Sergio. Universidad de la República. Facultad de Ciencias; UruguayFil: Miquel, Sergio Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Simone, Luiz R. L.. Universidade de Sao Paulo; BrasilFil: Cunha, Carlo M.. Universidade Metropolitana de Santos; Brasi

REVISTA BRASILEIRA DE PALEONTOLOGIA, 2018

A new fossil species of Biomphalaria Preston is described for the Upper Cretaceous of Uruguay (Qu... more A new fossil species of Biomphalaria Preston is described for the Upper Cretaceous of Uruguay (Queguay Formation). The new species is characterized by a conspicuous spiral ornamentation, a unique character within the genus. This new Biomphalaria species is the third known for the Queguay Formation, in addition to B. walteri (Parodiz) and B. reversa Cabrera, Martínez & Norbis. They represent the oldest record of this genus worldwide.

Historical Biology, 2018

Paleoecological studies of continental gastropods give valuable information about the depositiona... more Paleoecological studies of continental gastropods give valuable information about the depositional environment of the fossil assemblages. In South America, these assemblages from the Late Cretaceous/ Paleocene are scarce and poorly studied. Most works focuses on taxonomy, but a paleoecological approach is still missing. We analyzed the assemblages present in the Queguay limestones from Uruguay. The total fossil content consists in freshwater and terrestrial gastropods, characean gyrogonites, ostracods, Neosauropoda eggshells, vegetable remains, insect nests, and pupal chambers. As the precise age and sedimentary environment of the Queguay limestones have been discussed for almost nine decades, a paleoecological study was conducted in order to answer these questions from this point of view. Diversity (Simpson, Shannon-Wiener, equitability) and similarity (Jaccard and Kulczynski) indices were calculated; the analyses showed a close relationship among all locations, and therefore we conclude that there are not differences in fossil content among the localities. Moreover, the data allows to consider them basically of the same environment and age. The presence of Neosauropoda eggshells in several outcrops indicate unquestionably a Late Cretaceous age, and establish the oldest record worldwide for Pupillidae, Orthalicoidea and Biomphalaria.

Chemical Engineering Research and Design, 2019

Highlights  A solid fertilizer by granulation using the anaerobic digestion residue was develope... more Highlights  A solid fertilizer by granulation using the anaerobic digestion residue was developed  Zeolite, dolomite and calcium sulphate were successfully used as mineral seeds  Coated granules presented better mechanical properties than mineral seeds  Coated granules preserved the liquid digestate nutrient content

Journal of Fish Biology

The morphology of otoliths determines the function they perform, and it is influenced by genetic ... more The morphology of otoliths determines the function they perform, and it is influenced by genetic and environmental factors. Knowing those relationships is necessary to understand the role of hearing in fish. The objectives of this work were: exploring the shape of the sulcus of the sagittal otolith in seven species of Sciaenidae, in relation to sound production, and analyzing whether the shape and size of the sulcus can be used as a phylogenetic character. For this purpose, geometric morphometry analysis was carried out using landmarks data. It was found that there is an influence of size on the shape of the sulcus, and significant differences were found between the shapes of the sulcus (permutational multivariate analysis of variance). Three general shapes of the sulcus were identified (using principal component analysis, canonical variate analysis, and clustering): (1) in species that produce sounds at dominant frequencies <350 Hz, the deformation of the sulcus showed a tendenc...

A new material of a Quaternary waterfowl is described here. The implications of this finding, in ... more A new material of a Quaternary waterfowl is described here. The implications of this finding, in the context of the dispersal of Anatidae in the past, are discussed. The specimen consists in a partial humerus coming from the Upper Pleistocene of austral Chaco from Santiago del Estero Province, Argentina. The specimen here described belongs to the tribe Cygnini, being larger than most members of the clade. The humerus shows different size than with other members of the tribe Cygnini, being larger than the humeri referred to the Andean goose (Oressochen melanopterus), the Sheldgeese of the genus Chloephaga, the Comb Duck (Sarkidiornis sylvicola), and larger than the Ruddy Shelduck (Tadorna ferruginea). However, the humerus have several anatomical characters indicating that it belongs to a basal anserine duck. These combinations of features allow us to assign this fossil to a species of waterfowl: Coscoroba coscoroba. This finding, it context with the history of the South American Cygn...

Annales de Paléontologie, 2020

Adequate values of environmental parameters are crucial for the long-term preservation of the fos... more Adequate values of environmental parameters are crucial for the long-term preservation of the fossils in a palaeontological collection. In particular, incorrect or fluctuating temperature (T) and relative humidity (RH) can affect glued or repaired materials, induce the proliferation of mould, provoke mechanical breakage, recrystallization or mineral decay. From April 2015 to March 2017, six hygrothermometers were incorporated in selected microenvironments of the Palaeontological Collection at the

Upon interaction with immobilized antigens B cells form an immune synapse, where actin remodeling... more Upon interaction with immobilized antigens B cells form an immune synapse, where actin remodeling and re-positioning of the microtubule-organizing center (MTOC) together with lysosomes can facilitate antigen extraction. B cells have restricted cytoplasmic space, mainly occupied by a large nucleus, yet the role of nuclear morphology in the formation of the immune synapse has not been addressed. Here we show that, upon activation, B cells re-orientate and adapt the size of their nuclear groove facing the immune synapse, where the MTOC sits and lysosomes accumulate. Silencing nuclear envelope proteins, Nesprin-1 and Sun-1, impairs nuclear reorientation towards the synapse and leads to defects in actin organization at this level. Consequently, B cells are unable to internalize the BCR after antigen activation. Nesprin-1 and Sun-1-silenced B cells also fail to accumulate the tethering factor Exo70 at the center of the synaptic membrane and display defective lysosome positioning, impairin...

Journal of Research in Pharmacy, 2022

How to cite this article: Razuc MF, Cabrera FA, Garrido ME, Ramirez-Rigo MV. New reliable and rap... more How to cite this article: Razuc MF, Cabrera FA, Garrido ME, Ramirez-Rigo MV. New reliable and rapid HPLC method for the simultaneous determination of amoxicıllin and sulbactam pivoxil in pharmaceutıcals. Application to both assay and dissolution samples.

Topics in Geobiology, 2019

The use of alien invasive species is applied for the first time to evaluate the taphonomic damage... more The use of alien invasive species is applied for the first time to evaluate the taphonomic damage during a period of up to two decades, in natural conditions. A preliminary study using shells of the gastropod Rapana venosa collected in a microtidal beach showed that the specimens suffered important damage in the considered time span, comparable with the one registered in presumably older shells.

espanolEl presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Nari... more espanolEl presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con muestras de suelo tomadas en dos lotes (L1 y L2) de la granja experimental Botana, los cuales se caracterizan por ser suelos Andisoles que presentan una textura franco arcillosos con historiales muy diferentes desde el punto de vista de manejo, L1 es utilizado bajo un arreglo agroforestal con rotacion de cultivos y L2 ha permanecido bajo pastura con arboles dispersos.Este trabajo consistio en estandarizar el metodo Kononova-Belchikova para la extraccion y fraccionamiento de sustancias humicas (SH) y ademas adaptar una metodologia para la purificacion y analisis de dichas sustancias, para lo cual fue necesario realizar modificaciones a los protocolos originales. Para el analisis de las SH se utilizo la relacion E4/E6 la cual depende de los tamanos, pesos moleculares y grado de condensacion de los acidos humicos (AH) y ^ los acidos fulvicos (AF) obtenidos de las diferentes muestras...

In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the L... more In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the Late Cretaceous of the Norte Basin, whose record is formed by predominantly siliciclastic continental fossiliferous sedimentary rocks. A factor that contributed to the terminology proliferation was the misplaced importance attributed to the epigenetic processes and products (calcretes and ferricretes, occasionally fossiliferous) affecting those siliciclastic rocks. Based on field work and lithological logs from a number of key areas, the validity of the original stratigraphic column showing, from base to top, the Guichon, Mercedes, Asencio and Queguay formations is supported. For those particular units, the lithostratigraphic scope given by the original definitions is correct and, with minimum adjustments, they should be restored for their practical usefulness as geological mapping units. An evolutionary scheme for the Late Cretaceous of the Norte Basin is herein presented, with the aim o...

A new species of Pupoides Pfeiffer 1854, subgenus Ischnopupoides Pilsbry 1926, is described for t... more A new species of Pupoides Pfeiffer 1854, subgenus Ischnopupoides Pilsbry 1926, is described for the Late Cretaceous of Uruguay (Queguay Formation), being the oldest record of the genus and subgenus. Pupoides (I.) gnocco new species is characterized by a small dextral fusiform shell, constituted by a spire comprising five slightly convex whorls, oblicuous axial ornamentation, subrounded aperture, and an expanded outer lip that lacks dentition.

Actualistic Taphonomy in South America, 2020

In the Southern Brazil Shelf (SBS), surface bioclastic concentrations are associated with putativ... more In the Southern Brazil Shelf (SBS), surface bioclastic concentrations are associated with putative paleo-shorelines formed where wave ravinement surfaces are probably present. From the late Last Glacial Maximum, the SBS can be considered a sediment-starved passive margin continental shelf, with its morphostructural development fairly known. There, fourteen molluscan shell samples from near shelf-break deposits (“distal shell-rich”), eleven from proximal, low depth bioclastic deposits (“proximal shell-rich”) and ten samples from sandy substrate (“shell-poor”) were evaluated for taphonomic damage accordingly to updated protocols. Multivariate statistical analysis showed significant differences between the three groups of shelly samples. Low-intensity damage states (such as natural bright and ornamentation) dominate samples from the distal shell-rich deposit, whereas the inverse occurs in the proximal deposit (samples from the shell-poor locations present an intermediate damage pattern...

Las “Calizas del Queguay”, aflorantes en Uruguay en la Cuenca de Santa Lucia y sector correspondi... more Las “Calizas del Queguay”, aflorantes en Uruguay en la Cuenca de Santa Lucia y sector correspondiente de la Cuenca de Parana, y marginalmente en el litoral de la Mesopotamia Argentina, son depositos rocosos esencialmente carbonaticos que resultan de energicos procesos de calcretizacion–silcretizacion pedogenicos y de aguas subterraneas, palustres o inclusive, lacustres segun algunos autores. Los procesos de calcretizacion se habrian producido en el Cretacico Tardio y se intercalaron o sobreimpusieron a cualquier roca aflorante o subaflorante en ese tiempo, mayormente cretacicas, pero tambien precambricas y devonicas. Los procesos de silicificacion, en cualquier caso, se dan sobre las calizas con diferentes intensidades y si bien puede haber mas abundancia de silcretas en algunas zonas allende al Rio Uruguay, la silicificacion es un atributo que se observa en toda la extension de esta unidad. Por el momento no es posible discriminar proveniencias de muestras de mano o artefactos pr...

El presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con... more El presente trabajo se desarrollo en los Laboratorios de Quimica de la Universidad de Narino, con muestras de suelo tomadas en dos lotes (L1 y L2) de la granja experimental Botana, los cuales se caracterizan por ser suelos Andisoles que presentan una textura franco arcillosos con historiales muy diferentes desde el punto de vista de manejo, L1 es utilizado bajo un arreglo agroforestal con rotacion de cultivos y L2 ha permanecido bajo pastura con arboles dispersos. Este trabajo consistio en estandarizar el metodo Kononova-Belchikova para la extraccion y fraccionamiento de sustancias humicas (SH) y ademas adaptar una metodologia para la purificacion y analisis de dichas sustancias, para lo cual fue necesario realizar modificaciones a los protocolos originales. Para el analisis de las SH se utilizo la relacion E4/E6 la cual depende de los tamanos, pesos moleculares y grado de condensacion de los acidos humicos (AH) y ^ los acidos fulvicos (AF) obtenidos de las diferentes muestras. Tamb...

Journal of Molluscan Studies, 2021

ABSTRACTIn the Late Cretaceous fossil record of Uruguay, three morphotypes of Bulimulus (Bulimuli... more ABSTRACTIn the Late Cretaceous fossil record of Uruguay, three morphotypes of Bulimulus (Bulimulidae) have been recorded: Bulimulus klappenbachi and two undescribed ones. A geometric morphometric analysis was conducted to show whether the three morphotypes represent one or more species. With this aim, the three fossils were compared with three extant species of the same genus: Bulimulus bonariensis, B. guadalupensis and B. rushi. Variability within and among these three well-known extant species was tested to evaluate differences in the fossil morphotypes. Twenty-eight landmarks were selected (9 permanent landmarks and 19 semi-landmarks) and principal component analysis and canonical variate analysis were performed. Results indicate that only one of the unnamed morphotypes can be described as a new species and that the other is a variant of B. klappenbachi. The latter fossil species is described as Bulimulus frenguellii n. sp.

Geosciences = Geociências, 2019

In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the L... more In the last 40 years, successive revisions have been introduced to the lithostratigraphy of the Late Cretaceous of the Norte Basin, whose record is formed by predominantly siliciclastic continental fossiliferous sedimentary rocks. A factor that contributed to the terminology proliferation was the misplaced importance attributed to the epigenetic processes and products (calcretes and ferricretes, occasionally fossiliferous) affecting those siliciclastic rocks. Based on field work and lithological logs from a number of key areas, the validity of the original stratigraphic column showing, from base to top, the Guichón, Mercedes, Asencio and Queguay formations is supported. For those particular units, the lithostratigraphic scope given by the original definitions is correct and, with minimum adjustments, they should be restored for their practical usefulness as geological mapping units. An evolutionary scheme for the Late Cretaceous of the Norte Basin is herein presented, with the aim o...

Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2018

The South American fossil record of pulmonate gastropods counts with circa 100species from the Cr... more The South American fossil record of pulmonate gastropods counts with circa 100species from the Cretaceous to the Pliocene. As this knowledge is largely scattered in the literature, we present here a checklist of these fossils, with relevant data about each species’ type locality, stratum and age, and illustrating the type specimens whenever possible. Moreover, some taxonomical problems are highlighted in the hope of garnering attention for future research.Fil: Salvador, Rodrigo B.. Museum of New Zealand Te Papa Tongarewa; Nueva ZelandaFil: Cabrera, Fernanda. Universidad de la República. Facultad de Ciencias; UruguayFil: Martínez, Sergio. Universidad de la República. Facultad de Ciencias; UruguayFil: Miquel, Sergio Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Simone, Luiz R. L.. Universidade de Sao Paulo; BrasilFil: Cunha, Carlo M.. Universidade Metropolitana de Santos; Brasi

REVISTA BRASILEIRA DE PALEONTOLOGIA, 2018

A new fossil species of Biomphalaria Preston is described for the Upper Cretaceous of Uruguay (Qu... more A new fossil species of Biomphalaria Preston is described for the Upper Cretaceous of Uruguay (Queguay Formation). The new species is characterized by a conspicuous spiral ornamentation, a unique character within the genus. This new Biomphalaria species is the third known for the Queguay Formation, in addition to B. walteri (Parodiz) and B. reversa Cabrera, Martínez & Norbis. They represent the oldest record of this genus worldwide.

Historical Biology, 2018

Paleoecological studies of continental gastropods give valuable information about the depositiona... more Paleoecological studies of continental gastropods give valuable information about the depositional environment of the fossil assemblages. In South America, these assemblages from the Late Cretaceous/ Paleocene are scarce and poorly studied. Most works focuses on taxonomy, but a paleoecological approach is still missing. We analyzed the assemblages present in the Queguay limestones from Uruguay. The total fossil content consists in freshwater and terrestrial gastropods, characean gyrogonites, ostracods, Neosauropoda eggshells, vegetable remains, insect nests, and pupal chambers. As the precise age and sedimentary environment of the Queguay limestones have been discussed for almost nine decades, a paleoecological study was conducted in order to answer these questions from this point of view. Diversity (Simpson, Shannon-Wiener, equitability) and similarity (Jaccard and Kulczynski) indices were calculated; the analyses showed a close relationship among all locations, and therefore we conclude that there are not differences in fossil content among the localities. Moreover, the data allows to consider them basically of the same environment and age. The presence of Neosauropoda eggshells in several outcrops indicate unquestionably a Late Cretaceous age, and establish the oldest record worldwide for Pupillidae, Orthalicoidea and Biomphalaria.

Chemical Engineering Research and Design, 2019

Highlights  A solid fertilizer by granulation using the anaerobic digestion residue was develope... more Highlights  A solid fertilizer by granulation using the anaerobic digestion residue was developed  Zeolite, dolomite and calcium sulphate were successfully used as mineral seeds  Coated granules presented better mechanical properties than mineral seeds  Coated granules preserved the liquid digestate nutrient content