New plant fossil records and biostratigraphic analysis from the Uspallata Group (Late Triassic) at Cacheuta Hill, Cuyo Basin, west-central Argentina

Bodnar, Josefina; Morel, Eduardo Manuel; Coturel, Eliana Paula; Ganuza, Daniel Gustavo

doi:10.1016/j.geobios.2020.04.002

Cited by 16 publications

(9 citation statements)

References 49 publications

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“…The presence of Scytophyllum is the first mention of these structures for the Agua de los Pajaritos depocenter. The discovery of materials assignable to Rissikianthus extends its distribution because previously, similar elements had only been mentioned in the Cañadón Largo Formation of the El Tranquilo Group (Gnaedinger and Herbst, 2008;Gnaedinger, 2010) and in the Cacheuta Formation (Bodnar et al, 2020).The presence of Acevedoa cf. rastroensis expanded the distribution of this genus, which had previously been described only in the Los Rastros Formation in the Ischigualasto-Villa Unión Basin Lutz, 2010, 2014).…”

Section: Discussionmentioning

confidence: 76%

“…The importance of discovering strobiliform structures assigned to the genus Rissikianthus corresponds to the first record of this genus in the San Juan Province. In addition, it expands the biostratigraphic distribution of the genus because materials assignable to Rissikianthus have been mentioned in the Cañadón Largo Formation of the El Tranquilo Group (Gnaedinger, 2010;Gnaedinger and Herbst, 2008) andthe Cacheuta Formation of the Uspallata Group (Bodnar et al, 2020), both from the Upper Triassic. The presence of permineralized wood assignable to the genus Protocircoporoxylon also extends the paleobiogeographic distribution of the genus to the Cuyana Basin.…”

Section: Paleogeographic and Biostratigraphic Considerationsmentioning

confidence: 95%

“…In Argentina, the first mention of specimens assigned to Rissikianthus were Gnaedinger (2010) and Gnaedinger and Herbst (2008); however, the results of these studies lack descriptions and illustrations. Also, Bodnar et al (2020) released the first description of a pollen cone assigned to Rissikianthus for the Cacheuta Formation, Cuyana Basin, Mendoza Province. These authors could not assign the material to a particular species because most of the diagnostic characters were not preserved.…”

Section: Cf Rissikianthusmentioning

confidence: 99%

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A new paleofloristic assemblage from the Cuyana Basin (Agua de los Pajaritos depocenter), Argentina and its paleobiogeographic and paleoenvironmental implications

Drovandi

Correa

Bodnar

et al. 2020

Journal of South American Earth Sciences

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The paleoflora includes representatives of Isoetales, Peltaspermales, and Coniferales in addition to some unidentified taxa classified as incertae sedis. The species determined, described, and compared were: Lepacyclotes sp.; Matatiella cf. roseta, Anderson and Ander-son2003; Scytophyllum sp.; Cf. Rissikianthus; Protocircoporoxylon sp.; Cordaicarpus sp.; and Acevedoa cf. rastroensis (Arce and Lutz) Arce and Lutz 2014. In addition, a model is proposed to determine paleofloristic associations as well as reconstruction of the paleoenvironment based on the depositional architecture and the preservational mode of the paleofloristic remains.

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Section: Discussionmentioning

confidence: 76%

Section: Paleogeographic and Biostratigraphic Considerationsmentioning

confidence: 95%

Section: Cf Rissikianthusmentioning

confidence: 99%

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A new paleofloristic assemblage from the Cuyana Basin (Agua de los Pajaritos depocenter), Argentina and its paleobiogeographic and paleoenvironmental implications

Drovandi

Correa

Bodnar

et al. 2020

Journal of South American Earth Sciences

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“…However, the Cretaceous voltzialean conifers, which are members of the family Krassiloviaceae, produced peltate OCs with multiple spines at their distal area. Moreover, while some Paleozoic Voltziales have a leaf morphology comparable to that of the Patagonian remains (e.g., Stewart & Rothwell, 1993; Hernandez‐Castillo et al, 2009), Mesozoic Voltziales are characterized by expanded, multiveined leaves (Escapa et al, 2010; Morel et al, 2011; Bomfleur et al, 2013; Bodnar et al, 2020; Herrera et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

New genus of Cupressaceae from the Upper Cretaceous of Patagonia (Argentina) fills a gap in the evolution of the ovuliferous complex in the family

Andruchow‐Colombo

Gandolfo

Escapa

et al. 2022

J of Systematics Evolution

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The conifer family Cupressaceae encompasses seven subfamilies. Five of them were once considered to constitute the family Taxodiaceae, later eliminated because of its paraphyletic nature but remaining as an informal category for early‐diverging Cupressaceae lineages. Among the taxodiaceous subfamilies, Athrotaxoideae shows a unique morphology in its ovuliferous complexes (OCs) and a phylogenetically unexplored fossil record. We describe the new genus and species Patagotaxodia lefipanensis, based on OC adpressions associated with leafy branches collected at the Maastrichtian section of the Lefipán Formation (Patagonia, Argentina), and we refer it to Athrotaxoideae. We include Patagotaxodia in total evidence phylogenetic analysis to test its affinity, and we recover it within the subfamilies Athrotaxoideae or Cunninghamioideae. However, we argue that the characters supporting the athrotaxoid affinity are more meaningful in a taxodiaceous systematic context. This placement is also supported by taxon inclusion‐exclusion experiments. We discuss the position of other Cretaceous athrotaxoid records. With basis on the morphological insights provided by the OC morphology of extant and extinct Athrotaxoideae, we study the evolution of the OC morphology in the family in a phylogenetic context and discuss the results in the light of the fossil record of the family. We discuss how and when the different morphologies appeared in the family. Based on phylogenetic, temporal, morphological, and ontogenetic evidence, we conclude that the OC morphology shown by the subfamily Athrotaxoideae is intermediate between two of the most common morphologies within extant and extinct Cupressaceae species, one of which would show adaptative advantages over basal morphologies.

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“…Umkomasia has been affiliated with the microsporangium Pteruchus and Dicroidium leaves (Thomas, 1933;Petriella, 1977Petriella, , 1980Petriella, , 1981Anderson & Anderson, 2003;Anderson et al, 2019). In Argentina specimens assigned to Umkomasia have been reported in the Potrerillos, Cortaderita, and Paso Flores formations (Cuyana Basin) (Artabe et al, 2001;Gnaedinger & Zavattieri, 2017;Bodnar et al, 2020).…”

Section: Systematic Paleontologymentioning

confidence: 99%

Plant reproductive structures of the Agua de la Zorra and Los Rastros formations, Triassic, Argentina

Pedernera

Gómez

2022

Rev. bras. paleontol.

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The Triassic paleofloras of Argentina are mainly known for their vegetative elements. During the last decade, several contributions have focused on the study of Triassic reproductive structures. Here, we provide new information on reproductive structures recovered from two Triassic units from the central-west of Argentina: the Agua de la Zorra Formation (Cuyana Basin) and the Los Rastros Formation (Ischigualasto-Villa Unión Basin). These specimens had been described in previous contributions, however, the taxonomic assignment of the materials remained undetermined. In this work, a redescription of the materials is provided, allowing the taxonomic assignment of the specimens. The Agua de la Zorra Formation female reproductive structures were assigned to Matatiella sp. (Matatiellaceae) and to Rissikiostrobus reductus (Podocarpaceae). The female strobilus specimen registered in the Los Rastros Formation was assigned to the genus Umkomasia (Umkomasiaceae). This contribution represents a step forward to a better understanding of the reproductive structures for the Triassic of Gondwana. Keywords: Matatiella, Rissikiostrobus, Umkomasia, Gondwana, Argentina.

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New plant fossil records and biostratigraphic analysis from the Uspallata Group (Late Triassic) at Cacheuta Hill, Cuyo Basin, west-central Argentina

Cited by 16 publications

References 49 publications

A new paleofloristic assemblage from the Cuyana Basin (Agua de los Pajaritos depocenter), Argentina and its paleobiogeographic and paleoenvironmental implications

A new paleofloristic assemblage from the Cuyana Basin (Agua de los Pajaritos depocenter), Argentina and its paleobiogeographic and paleoenvironmental implications

New genus of Cupressaceae from the Upper Cretaceous of Patagonia (Argentina) fills a gap in the evolution of the ovuliferous complex in the family

Plant reproductive structures of the Agua de la Zorra and Los Rastros formations, Triassic, Argentina

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