Papers by Cecilia Pirrone
Se describen las características paleoambientales e icnológicas del tramo medio de la Formación A... more Se describen las características paleoambientales e icnológicas del tramo medio de la Formación Agua del Jagüel (Carbonífero, Precordillera de Mendoza). Fueron reconocidas cinco facies agrupadas en tres asociaciones de facies sedimentarias, las que caracterizan la evolución de un sistema fluvio-estuarino. La asociación de facies 1, formada por conglomerados y areniscas conglomerádicas de origen fluvial, se dispone sobre una superficie erosiva que los separa de niveles postglaciales correspondientes a la parte basal de la Formación Agua de Jagüel. La asociación de facies 2 incluye en su base a depósitos finos (fangolitas) que indican la inundación del sistema, seguida por sedimentación arenosacorrespondiente a ambientes de boca de estuario indicando una progresiva transgresión dentro del estuario. La asociación de facies 3 corresponde a dos intervalos de areniscas36 muy gruesas fluviales, separados por areniscas muy finas y fangolitas depositadas durante un breve evento transgresivo....
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Universidad de Granada. Facultad de Ciencias de la Educación, Mar 1, 2020
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Revista de Educación de la Universidad de Granada, 2020
Este estudio aborda la problemática, dentro del campo didáctico de la enseñanza de la Biología Hu... more Este estudio aborda la problemática, dentro del campo didáctico de la enseñanza de la Biología Humana, de la construcción de conceptos sobre el funcionamiento cerebral en interacción con sustancias adictivas, en el marco de la educación secundaria. El desarrollo del mismo se enfocó en: 1) rescatar las concepciones de los estudiantes acerca de la estructura-función del sistema nervioso en general; 2) relevar la relación que establecen entre algunas sustancias psicoactivas (alcohol, marihuana y tabaco), el funcionamiento cerebral y el impacto sobre otras funciones orgánicas; 3) relevar la potencialidad de la formación de conductas de protección de la salud.El abordaje metodológico incluyó la resolución de un estudio diagnóstico-intervencionista, en cuatro establecimientos educativos, en aulas de segundo año de educación secundaria, en Mendoza, Argentina. En éste se implementaron estudios de pre y post-test mediante un instrumento validado. Se desarrolló en toda la muestra poblacional ...
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Ichnos, 2016
ABSTRACT We describe a novel type of arthropod bioerosion trace fossil, Amphifaoichnus seilacheri... more ABSTRACT We describe a novel type of arthropod bioerosion trace fossil, Amphifaoichnus seilacheri new igen., new isp., associated with sauropod bones from the Upper Cretaceous (Coniacian–Early Santonian) Plottier Formation of western Argentina. The specimens are preserved in distal-floodplain deposits. The new ichnotaxon consists of predominantly horizontal, unbranched, unlined, elongated tubes, emplaced at the interface of bone and sediment, but penetrating the bone cortical tissue as well. Fill consists of unconsolidated sediment with evenly distributed bone chips in the infill sorted by size. The presence of bone fragments within the structures indicates prior bioerosion of the bone and their subsequent emplacement as part of the trace fill. A coleopteran with a heavily sclerotized body and well-developed biting mouthparts is tentatively inferred as a tracemaker. Amphifaoichnus seilacheri is interpreted as fodinichnion, reflecting the activity of scavengers able to decompose dinosaur carcasses. This ichnotaxon represents a novel ethology and ecological linkage previously undetected in continental ecosystems.
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Historical Biology, 2015
Abstract We report the oldest fossil evidence of osteophagia by terrestrial invertebrates on both... more Abstract We report the oldest fossil evidence of osteophagia by terrestrial invertebrates on both the Asian and African continents. Bones attributable to the Middle Jurassic dinosaur Chuanjiesaurus (Dinosauria: Sauropoda) were found with post-mortem insect modification in the Chuanjie Formation, Yunnan Province, China. The morphology of the borings closely matches the ichnogenus Cubiculum. Based on the lack of bioglyphs observed in Cubiculum ornatus, a new ichnospecies is proposed here. The new trace fossil, Cubiculum inornatus isp. nov., is interpreted to have been constructed for pupation by an unknown taxon of insect. Additionally, we report even older borings from Early Jurassic dinosaur bones of the Elliott Formation in the Karoo Basin, which represent the second oldest occurrence of insect traces in bone from continental settings. Both trace fossils sites have palaeogeographic implications for the origins and dispersal of osteophagia amongst terrestrial invertebrates during the Mesozoic. These discoveries push back the antiquity of pupation in animal bones by more than 100 million years to the Middle Jurassic, indicating that this behaviour, and osteophagy more generally, originated early in the Mesozoic, roughly comparable with the origination of insect pupation in woody substrates (Late Triassic).
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Journal of Paleontology, 2014
Bioerosion trace fossils in bones are defined as biogenic structures that cut or destroy hard bon... more Bioerosion trace fossils in bones are defined as biogenic structures that cut or destroy hard bone tissue as the result of mechanical and/or chemical processes. Under the premise that their paleoecological potential can completely be realized only through correct taxonomic assignment, this work focuses on the methodology for naming these biogenic structures. Thus, we propose the following ichnotaxobases in order to assist in naming trace fossils in bones: general morphology, bioglyphs, filling, branching, pattern of occurrence, and site of emplacement. The most common general morphologies are: pits and holes (borings); chambers; trails; tubes; channels (canals); grooves; striae; and furrows. The main types of bioglyphs are grooves and scratches, which may display different arrangements, such as parallel and opposing, or arcuate paired. The nature of the fill may help recognition of the origin, composition, and relationship with the surrounding sediment, as well as processes of destr...
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Ichnos, 2014
The new ichnospecies Cubiculum levis is described as a bowl-shaped bioerosion trace fossil in din... more The new ichnospecies Cubiculum levis is described as a bowl-shaped bioerosion trace fossil in dinosaur bone from the Upper Cretaceous of western Argentina. The systematic description is based on specific ichnotaxobases for bioerosion trace fossils in bones. The main characteristics of the new ichnospecies are its general bowl-shaped morphology with marked concavity of the flanks and bottom, marked constriction of walls in the upper area, and the absence of bioglyphs in the interior surface. To establish a hierarchical approach to the taxonomy of Cubiculum, we propose an emended diagnosis for this ichnogenus. Based on comparative analysis with structures of fossil pupal chambers and results of actualistic experiments with carrion insects, the ethology of C. levis is interpreted as Pupichnia. Paleoenvironmental conditions at the paleontological site, taphonomic data and the morphology of C. levis indicate a continental arthropod producer with the biological and anatomical ability to bore bone. The producer was probably a Cretaceous coleopteran with a heavily sclerotized body and well-developed biting mouthparts. We emphasize the importance of establishing paleoethologic and paleobiologic inferences based on testable data provided by multiple sources, such as biology, physiology, sedimentology, and forensic sciences. Finally, we cite some relevant reports of traces fossils in bones interpreted as pupal chambers and we discuss the conflicting interpretations of their producers and ecological significance.
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Se describen las caracteristicas paleoambientales e icnologicas del tramo medio de la Formacion A... more Se describen las caracteristicas paleoambientales e icnologicas del tramo medio de la Formacion Agua del Jaguel (Carbonifero, Precordillera de Mendoza). Fueron reconocidas cinco facies agrupadas en tres asociaciones de facies sedimentarias, las que caracterizan la evolucion de un sistema fluvio-estuarino. La asociacion de facies 1, formada por conglomerados y areniscas conglomeradicas de origen fluvial, se dispone sobre una superficie erosiva que los separa de niveles postglaciales correspondientes a la parte basal de la Formacion Agua de Jaguel. La asociacion de facies 2 incluye en su base a depositos finos (fangolitas) que indican la inundacion del sistema, seguida por sedimentacion arenosa correspondiente a ambientes de boca de estuario indicando una progresiva transgresion dentro del estuario. La asociacion de facies 3 corresponde a dos intervalos de areniscas muy gruesas fluviales, separados por areniscas muy finas y fangolitas depositadas durante un breve evento transgresivo. ...
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We describe a novel type of arthropod bioerosion trace fossil, Amphifaoichnus seilacheri new igen... more We describe a novel type of arthropod bioerosion trace fossil, Amphifaoichnus seilacheri new igen.,
new isp., associated with sauropod bones from the Upper Cretaceous (Coniacian–Early Santonian)
Plottier Formation of western Argentina. The specimens are preserved in distal-floodplain deposits.
The new ichnotaxon consists of predominantly horizontal, unbranched, unlined, elongated tubes,
emplaced at the interface of bone and sediment, but penetrating the bone cortical tissue as well.
Fill consists of unconsolidated sediment with evenly distributed bone chips in the infill sorted by
size. The presence of bone fragments within the structures indicates prior bioerosion of the bone
and their subsequent emplacement as part of the trace fill. A coleopteran with a heavily sclerotized
body and well-developed biting mouthparts is tentatively inferred as a tracemaker. Amphifaoichnus
seilacheri is interpreted as fodinichnion, reflecting the activity of scavengers able to decompose
dinosaur carcasses. This ichnotaxon represents a novel ethology and ecological linkage previously
undetected in continental ecosystems.
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We report the oldest fossil evidence of osteophagia by terrestrial invertebrates on both the Asia... more We report the oldest fossil evidence of osteophagia by terrestrial invertebrates on both the Asian and
African continents. Bones attributable to the Middle Jurassic dinosaur Chuanjiesaurus (Dinosauria:
Sauropoda) were found with post-mortem insect modification in the Chuanjie Formation, Yunnan
Province, China. The morphology of the borings closely matches the ichnogenus Cubiculum. Based on the
lack of bioglyphs observed in Cubiculum ornatus, a new ichnospecies is proposed here. The new trace
fossil, Cubiculum inornatus isp. nov., is interpreted to have been constructed for pupation by an unknown
taxon of insect. Additionally, we report even older borings from Early Jurassic dinosaur bones of the Elliott
Formation in the Karoo Basin, which represent the second oldest occurrence of insect traces in bone
from continental settings. Both trace fossils sites have palaeogeographic implications for the origins and
dispersal of osteophagia amongst terrestrial invertebrates during the Mesozoic. These discoveries push
back the antiquity of pupation in animal bones by more than 100 million years to the Middle Jurassic,
indicating that this behaviour, and osteophagy more generally, originated early in the Mesozoic, roughly
comparable with the origination of insect pupation in woody substrates (Late Triassic).
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Journal of Paleontology, Jan 2014
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Cretaceous Research, Jan 1, 2009
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Papers by Cecilia Pirrone
new isp., associated with sauropod bones from the Upper Cretaceous (Coniacian–Early Santonian)
Plottier Formation of western Argentina. The specimens are preserved in distal-floodplain deposits.
The new ichnotaxon consists of predominantly horizontal, unbranched, unlined, elongated tubes,
emplaced at the interface of bone and sediment, but penetrating the bone cortical tissue as well.
Fill consists of unconsolidated sediment with evenly distributed bone chips in the infill sorted by
size. The presence of bone fragments within the structures indicates prior bioerosion of the bone
and their subsequent emplacement as part of the trace fill. A coleopteran with a heavily sclerotized
body and well-developed biting mouthparts is tentatively inferred as a tracemaker. Amphifaoichnus
seilacheri is interpreted as fodinichnion, reflecting the activity of scavengers able to decompose
dinosaur carcasses. This ichnotaxon represents a novel ethology and ecological linkage previously
undetected in continental ecosystems.
African continents. Bones attributable to the Middle Jurassic dinosaur Chuanjiesaurus (Dinosauria:
Sauropoda) were found with post-mortem insect modification in the Chuanjie Formation, Yunnan
Province, China. The morphology of the borings closely matches the ichnogenus Cubiculum. Based on the
lack of bioglyphs observed in Cubiculum ornatus, a new ichnospecies is proposed here. The new trace
fossil, Cubiculum inornatus isp. nov., is interpreted to have been constructed for pupation by an unknown
taxon of insect. Additionally, we report even older borings from Early Jurassic dinosaur bones of the Elliott
Formation in the Karoo Basin, which represent the second oldest occurrence of insect traces in bone
from continental settings. Both trace fossils sites have palaeogeographic implications for the origins and
dispersal of osteophagia amongst terrestrial invertebrates during the Mesozoic. These discoveries push
back the antiquity of pupation in animal bones by more than 100 million years to the Middle Jurassic,
indicating that this behaviour, and osteophagy more generally, originated early in the Mesozoic, roughly
comparable with the origination of insect pupation in woody substrates (Late Triassic).
new isp., associated with sauropod bones from the Upper Cretaceous (Coniacian–Early Santonian)
Plottier Formation of western Argentina. The specimens are preserved in distal-floodplain deposits.
The new ichnotaxon consists of predominantly horizontal, unbranched, unlined, elongated tubes,
emplaced at the interface of bone and sediment, but penetrating the bone cortical tissue as well.
Fill consists of unconsolidated sediment with evenly distributed bone chips in the infill sorted by
size. The presence of bone fragments within the structures indicates prior bioerosion of the bone
and their subsequent emplacement as part of the trace fill. A coleopteran with a heavily sclerotized
body and well-developed biting mouthparts is tentatively inferred as a tracemaker. Amphifaoichnus
seilacheri is interpreted as fodinichnion, reflecting the activity of scavengers able to decompose
dinosaur carcasses. This ichnotaxon represents a novel ethology and ecological linkage previously
undetected in continental ecosystems.
African continents. Bones attributable to the Middle Jurassic dinosaur Chuanjiesaurus (Dinosauria:
Sauropoda) were found with post-mortem insect modification in the Chuanjie Formation, Yunnan
Province, China. The morphology of the borings closely matches the ichnogenus Cubiculum. Based on the
lack of bioglyphs observed in Cubiculum ornatus, a new ichnospecies is proposed here. The new trace
fossil, Cubiculum inornatus isp. nov., is interpreted to have been constructed for pupation by an unknown
taxon of insect. Additionally, we report even older borings from Early Jurassic dinosaur bones of the Elliott
Formation in the Karoo Basin, which represent the second oldest occurrence of insect traces in bone
from continental settings. Both trace fossils sites have palaeogeographic implications for the origins and
dispersal of osteophagia amongst terrestrial invertebrates during the Mesozoic. These discoveries push
back the antiquity of pupation in animal bones by more than 100 million years to the Middle Jurassic,
indicating that this behaviour, and osteophagy more generally, originated early in the Mesozoic, roughly
comparable with the origination of insect pupation in woody substrates (Late Triassic).