Finding of an Upper Pleistocene-Lower Holocene fecal fossil remain at General Guido Department, Buenos Aires province, Argentina

Chimento, Nicolás Roberto; Rey, Luciano

doi:10.22179/revmacn.10.280

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…In Argentina, coprolites interpreted as made by vertebrates were reported from Triassic and Cenozoic continental deposits (e.g., Hofreiter et al, 2003;Chimento & Rey, 2008;Aceñolaza, 2012;Krause & Piña, 2012;Mancuso et al, 2017). Particularly, the published fossil record of coprolites from Antarctica is scant, being restricted to the Permian Buckley Formation (Retallack & Krull, 1997) in the Transantarctic Mountains, and to the Jurassic Ameghino (=Nordenskjöld) Formation in the Antarctic Peninsula (Doyle & Whitham, 1991, fig.…”

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Bromalitos De La Formación Ameghino (=nordenskjöld) Jurasico Superior De La Península Antártica

Martinez¹,

Gouiric-Cavalli

Pérez

et al. 2023

PEAPA

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We present the study of the bromalites retrieved from the Upper Jurassic Ameghino (=Nordenskjöld) Formation at Longing Gap in the Antarctic Peninsula. The material was morphologically and chemically analyzed. We made a qualitative study and a taphonomic analysis of the specimens and tested paleobiological and paleoecological hypotheses. We conclude that the samples analyzed are coprolites and propose a new ichnotaxon, Antarctoscoprus longinensis ichnogen. and ichnosp. nov., characterized by being a small and flat coprolite differing from other ichnogenera by its composition, which consists mainly of actinopterygian remains (e.g., scales, vertebrae, skull bones, and teeth). Antarctoscoprus longinensis includes three morphotypes (i.e., circular, subcircular, and elongated) derived from an elongated three-dimensional original form by compactation. Based on the internal content, we infer the producers of the coprolites were carnivorous predators, putatively an ichthyophagous taxon. Due to the abundance of actinopterygians-mainly aspidorhynchids and ichthyodectids-and the size of the coprolites we propose macropredator fishes as the putative producers. The mainly undisrupted fish carcasses and coprolites allow us to conduct further studies that might lead to a better understanding of the ancient communities living in the Late Jurassic Sea that surrounded Antarctica.

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Bromalitos De La Formación Ameghino (=nordenskjöld) Jurasico Superior De La Península Antártica

Martinez¹,

Gouiric-Cavalli

Pérez

et al. 2023

PEAPA

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The Paleontological Context. Ichnology

Laza

2020

Springer Earth System Sciences

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Except for some previous records, the first attempts for the study of the lying tracks on sediments started at the beginning of the nineteenth century, as well as the efforts for creating a suitable terminology. Its installation as a scientific discipline began at the end of the nineteenth century. By middle twentieth century, a modern and organized scheme for the classification of ichnofossils and their location in ichnofacies was proposed. Firstly, the only recognized ichnofacies corresponded to marine environments and were defined by bathymetric levels and particular ichnofossils. Immediately, ichnofacies corresponding to transition environments from those marine to continental were identified. In 1985, the ichnological nomenclature became part of the International Code of Zoological Nomenclature. During the 1970s and 1980s, there were papers describing ichnites of continental origin, events that quickly led to the organization of the formal reconnaissance of environments carrying continental tracks, giving rise to successive ichnofacies. Apart from the paleosurfaces, the ichnological content is rich and quite varied in paleosols and so are the tracks of insect nests, solitary or in groups in these paleosols. Keywords Ichnology • Continental ichnofacies • Ichnites in paleosols Scheme of Continental IchnofaciesAlthough inert in themselves, the constructions made by a living organism contain a true flow of information about the needs and intentions of its builder (Lovelock 1979).Leaving aside some reference to coprolites toward the end of the seventeenth century, the beginnings of ichnology go back to the beginning of the nineteenth century with the description of vertebrate footprints and traces from marine rocks; additional tasks slowly developed and Ichnology attained status of scientific discipline in the last decades of the nineteenth century (Osgood 1975). The term Ichnology was proposed by Buckland in 1836, during the study of invertebrate trace fossils which were interpreted as belonging to algae ("fucoides") until Nathorst (1881), using the Uniformitarism Principle, proved their zoological origin.

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Continental Beds

Ubilla¹,

Martínez²

2016

Geology and Paleontology of the Quaternary of Uruguay

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Finding of an Upper Pleistocene-Lower Holocene fecal fossil remain at General Guido Department, Buenos Aires province, Argentina

Cited by 7 publications

References 18 publications

Bromalitos De La Formación Ameghino (=nordenskjöld) Jurasico Superior De La Península Antártica

Bromalitos De La Formación Ameghino (=nordenskjöld) Jurasico Superior De La Península Antártica

The Paleontological Context. Ichnology

Continental Beds

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