Age-constrained therapsid tracks from a mid-latitude upland (Permian–Triassic transition, Los Menucos Complex, Argentina)

Citton, Paolo; Valais, Silvina de; Díaz-Martínez, Ignacio; González, Santiago Nicolás; Greco, Gerson Alan; Cónsole-Gonella, Carlos; Leonardi, G.

doi:10.1016/j.jsames.2021.103367

Cited by 5 publications

(4 citation statements)

References 35 publications

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“…Dicroidium-type fossil flora imprints and tetrapod ichnites were described from different localities in the basin, leading to the assignation of a Changhsingian(?) to Olenekian (Lower Triassic) age (Bodnar et al 2021;Citton et al 2021).…”

Section: C2 Stratigraphy Of the Los Menucos Basin (Lmb)mentioning

confidence: 99%

“…The lower Aguada de la Mula Member is dominated by gravelly sandstone, medium to fine sandstone, and mudstone, deposited in fluvial channels and on floodplains (Labudía & Bjerg, 2001). The upper El Pilquin Member is exclusively composed of ash fall deposits, which contain Dicroidium-type flora and ichnites (Bodnar et al 2021;Citton et al 2021). The upper Sierra Colorada Formation is composed of three ignimbritic pulses, the first one only recognized at Puesto Vera, and the upper two well developed throughout the basin.…”

Section: C2 Stratigraphy Of the Los Menucos Basin (Lmb)mentioning

confidence: 99%

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The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

et al. 2022

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We conducted a U–Pb–Hf isotope study on zircon crystals from ignimbrites of the Changhsingian to Olenekian (253–248 Ma) Los Menucos Basin in the North Patagonian Massif (NPM), Argentina, in order to evaluate the age and petrogenesis of the magmas. Additionally, a compilation of whole-rock geochemistry and U–Pb–Hf in zircon isotope data for the Permian to Middle Triassic rocks of the NPM, for comparison with our data, was made to assess whether Patagonia would have been an exotic terrane accreted to SW Gondwana during the late Palaeozoic. We interpret the available U–Pb–Hf data to suggest that northern Patagonia experienced eastward arc expansion from the early Permian, about 273 Ma ago. This ∼820 km arc expansion event involved crustal shortening and magmatism with high-silica adakitic affinity, resulting in Hf-isotopic pull-down. At 253 Ma, slab steepening became associated with the coeval emplacement of ignimbrites of the Los Menucos Basin, which involved post-orogenic to intraplate magmatism. During the Middle Triassic, a slab break-off triggered uplift and basaltic underplating, promoting the emplacement of dike swarms with C-type adakitic signature at 246–244 Ma. The Hf isotope data for SW Gondwana for the same period indicate distinct trends that are explained here by differential slab roll-back since the Guadalupian, in a slab-tearing setting. Therefore, Permian to Middle Triassic magmatism is interpreted as having been associated with an eastward-directed proto-Pacific subduction system, which ultimately supports an autochthonous origin for Patagonia.

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Section: C2 Stratigraphy Of the Los Menucos Basin (Lmb)mentioning

confidence: 99%

Section: C2 Stratigraphy Of the Los Menucos Basin (Lmb)mentioning

confidence: 99%

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

et al. 2022

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“…Because these materials are indeterminate and they predate any record of the group from neighbouring geographic areas (Europe, South America), their relationships and geographic origin remain dubious. Their migration from South America seems a reasonable scenario, since our analysis reconstructed the presence of kannemeyeriiforms in that region as the most (e.g., Hunt et al 1993;Nesbitt & Angielczyk 2002;Melchor & de Valais 2006); however, their current dating suggest rather a Late Anisian age (Cariglino et al 2016;Díaz-Martínez et al 2019;Haque et al 2021). Possible dicynodont tracks are also known from the Anisian (including early Anisian) of Antarctica and Europe (England, France, Germany, and Italy), but their attribution to dicynodonts is less certain.…”

Section: Triassic Dicynodont Diversity and Occurrencesmentioning

confidence: 74%

Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dicynodonts

Szczygielski¹,

Sulej²

2023

Comptes Rendus Palevol

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Despite nearly two centuries of intensive research of dicynodont diversity and distribution, the progress of the last two decades makes the early 21st century a dicynodont renaissance. Here we introduce Woznikella triradiata n. gen., n. sp., a Late Triassic European kannemeyeriiform with stahleckeriid affinities that may represent an early diverging lineage of that family, preceding its split into Placeriinae King, 1988 and Stahleckeriinae Lehman, 1961. Woznikella triradiata n. gen., n. sp. is distinguished from other dicynodonts by its autapomorphic, slender scapula with distinctly expanded dorsal and ventral parts, acromion directed anterodorsally, and inconspicuous scapular spine. Furthermore, we review reported global occurrences of Triassic dicynodonts, including fragmentary, indeterminate finds that may capture cryptic diversity, and analyze the biogeography of the Permian and Triassic Dicynodontia. According to our results, the region of southeastern Africa (Malawi, Mozambique, Namibia, South Africa, Tanzania, Zambia) throughout the Permian and Triassic served as a hotspot of dicynodont diversity and origin point for lineages migrating north and west. Multiple taxa independently migrated to the Americas and Eurasia, indicating open passages between the regions of Southern and Northern Hemisphere. Southern migrations from the Northern Hemisphere appear to be very rare, however.

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“…Dicynodontipus has been reported from “Middle” Permian–Upper Triassic strata of Brazil ( Francischini et al, 2018 ), Italy ( Conti et al, 1977 ), South Africa ( De Klerk, 2002 ), Argentina ( Citton et al, 2021 ; Marsicano et al, 2004 ; Melchor & De Valais, 2006 ), Australia ( Retallack, 1996 ), and Germany ( Rühle von Lilienstern, 1944 ; De Valais et al, 2020 ). Dicynodontipus trackways are unknown after the Triassic, although some of the questionable, Early Jurassic ichnotaxa from Lesotho named by Ellenberger have some similarities ( Melchor & De Valais, 2006 ).…”

Section: Comparisonsmentioning

confidence: 99%

Possible eucynodont (Synapsida: Cynodontia) tracks from a lacustrine facies in the Lower Jurassic Moenave Formation of southwestern Utah

Hurtado,

Harris,

Milner

2024

PeerJ

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Eight fossil tetrapod footprints from lake-shore deposits in the Lower Jurassic Moenave Formation at the St. George Dinosaur Discovery Site (SGDS) in southwestern Utah cannot be assigned to the prevalent dinosaurian (Anomoepus, Eubrontes, Gigandipus, Grallator, Kayentapus) or crocodyliform (Batrachopus) ichnotaxa at the site. The tridactyl and tetradactyl footprints are incomplete, consisting of digit- and digit-tip-only imprints. Seven of the eight are likely pes prints; the remaining specimen is a possible manus print. The pes prints have digit imprint morphologies and similar anterior projections and divarication angles to those of Brasilichnium, an ichnotaxon found primarily in eolian paleoenvironments attributed to eucynodont synapsids. Although their incompleteness prevents clear referral to Brasilichnium, the SGDS tracks nevertheless suggest a eucynodont track maker and thus represent a rare, Early Mesozoic occurrence of such tracks outside of an eolian paleoenvironment.

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Age-constrained therapsid tracks from a mid-latitude upland (Permian–Triassic transition, Los Menucos Complex, Argentina)

Cited by 5 publications

References 35 publications

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dicynodonts

Possible eucynodont (Synapsida: Cynodontia) tracks from a lacustrine facies in the Lower Jurassic Moenave Formation of southwestern Utah

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Age-constrained therapsid tracks from a mid-latitude upland (Permian–Triassic transition, Los Menucos Complex, Argentina)

Cited by 5 publications

References 35 publications

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dic﻿ynodonts

Possible eucynodont (Synapsida: Cynodontia) tracks from a lacustrine facies in the Lower Jurassic Moenave Formation of southwestern Utah

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Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dicynodonts