A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina

The Los Menucos ichnofauna from the Río Negro province in Argentina, is at present a unique Triassic track association known from Patagonia. The new footprints described in the present study were collected from the same levels where the original tetrapod ichnites from Casamiquela's works were e...

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Detalles Bibliográficos
Autores principales: Domnanovich, N.S., Tomassini, R., Manera De Bianco, T., Dalponte, M.
Formato: JOUR
Materias:
Argentina
Late Triassic
Los Menucos complex
Tetrapod footprints
dinosaur
endemic species
footprint
Gondwana
relative abundance
tetrapod
Triassic
Los Menucos
Rio Negro [Argentina]
South America
Dicroidium
Dinosauria
Lepidosauria
Pentasauropus
Rhynchosauroides
Tetrapoda
Therapsida
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v45_n1_p211_Domnanovich
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v45_n1_p211_Domnanovich
record_format dspace
spelling todo:paper_00027014_v45_n1_p211_Domnanovich2023-10-03T13:53:03Z A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina Domnanovich, N.S. Tomassini, R. Manera De Bianco, T. Dalponte, M. Argentina Late Triassic Los Menucos complex Tetrapod footprints dinosaur endemic species footprint Gondwana relative abundance tetrapod Triassic Argentina Los Menucos Rio Negro [Argentina] South America Dicroidium Dinosauria Lepidosauria Pentasauropus Rhynchosauroides Tetrapoda Therapsida The Los Menucos ichnofauna from the Río Negro province in Argentina, is at present a unique Triassic track association known from Patagonia. The new footprints described in the present study were collected from the same levels where the original tetrapod ichnites from Casamiquela's works were exhumed. The track-bearing levels are included in the Los Menucos Complex and correspond to fine-grained tuffaceous sandstones interbedded with tuffaceous mudstones that contain a rich "Dicroidium-type Flora". In the present study new groups of trackmakers, that included footprints assigned to terapsid dicynodonts (Pentasauropus sp. Ellenberger) and putative "lepidosaurs" (Rhynchosauroides Maidwell) were identified. The new specimens described do not include ichnites related to archosaurs (basal archosaurs and/or dinosaurs), which are the dominant component in most known Late Triassic Gondwanan tetrapod faunas. Previous assumptions about the relative abundance and high diversity of small therapsids, probably theriodonts represented by the footprint assemblage are corroborated by the new evidence. This unusual situation, which is supported by the new findings, might be due to the record of an endemic fauna actually dominated by therapsid taxa in northern Patagonia. © Asociación Paleontológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v45_n1_p211_Domnanovich
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Late Triassic
Los Menucos complex
Tetrapod footprints
dinosaur
endemic species
footprint
Gondwana
relative abundance
tetrapod
Triassic
Argentina
Los Menucos
Rio Negro [Argentina]
South America
Dicroidium
Dinosauria
Lepidosauria
Pentasauropus
Rhynchosauroides
Tetrapoda
Therapsida
spellingShingle Argentina
Late Triassic
Los Menucos complex
Tetrapod footprints
dinosaur
endemic species
footprint
Gondwana
relative abundance
tetrapod
Triassic
Argentina
Los Menucos
Rio Negro [Argentina]
South America
Dicroidium
Dinosauria
Lepidosauria
Pentasauropus
Rhynchosauroides
Tetrapoda
Therapsida
Domnanovich, N.S.
Tomassini, R.
Manera De Bianco, T.
Dalponte, M.
A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
topic_facet Argentina
Late Triassic
Los Menucos complex
Tetrapod footprints
dinosaur
endemic species
footprint
Gondwana
relative abundance
tetrapod
Triassic
Argentina
Los Menucos
Rio Negro [Argentina]
South America
Dicroidium
Dinosauria
Lepidosauria
Pentasauropus
Rhynchosauroides
Tetrapoda
Therapsida
description The Los Menucos ichnofauna from the Río Negro province in Argentina, is at present a unique Triassic track association known from Patagonia. The new footprints described in the present study were collected from the same levels where the original tetrapod ichnites from Casamiquela's works were exhumed. The track-bearing levels are included in the Los Menucos Complex and correspond to fine-grained tuffaceous sandstones interbedded with tuffaceous mudstones that contain a rich "Dicroidium-type Flora". In the present study new groups of trackmakers, that included footprints assigned to terapsid dicynodonts (Pentasauropus sp. Ellenberger) and putative "lepidosaurs" (Rhynchosauroides Maidwell) were identified. The new specimens described do not include ichnites related to archosaurs (basal archosaurs and/or dinosaurs), which are the dominant component in most known Late Triassic Gondwanan tetrapod faunas. Previous assumptions about the relative abundance and high diversity of small therapsids, probably theriodonts represented by the footprint assemblage are corroborated by the new evidence. This unusual situation, which is supported by the new findings, might be due to the record of an endemic fauna actually dominated by therapsid taxa in northern Patagonia. © Asociación Paleontológica Argentina.
format JOUR
author Domnanovich, N.S.
Tomassini, R.
Manera De Bianco, T.
Dalponte, M.
author_facet Domnanovich, N.S.
Tomassini, R.
Manera De Bianco, T.
Dalponte, M.
author_sort Domnanovich, N.S.
title A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
title_short A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
title_full A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
title_fullStr A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
title_full_unstemmed A new contribution to the understanding of the upper Triassic tetrapod ichnofauna from Los Menucos (Los Menucos Complex), Rio Negro province, Argentina
title_sort new contribution to the understanding of the upper triassic tetrapod ichnofauna from los menucos (los menucos complex), rio negro province, argentina
url http://hdl.handle.net/20.500.12110/paper_00027014_v45_n1_p211_Domnanovich
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