Angiosperm fossil woods from the Upper Cretaceous of Western Antarctica (Santa Marta Formation)

Pujana, Roberto R.; Iglesias, Ari; Raffi, María Eugenia; Olivero, Eduardo B.

doi:10.1016/j.cretres.2018.06.009

Cited by 19 publications

(13 citation statements)

References 48 publications

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“…Studies related to the anatomy of fossil woods play an important role in understanding the Antarctic palaeofloras and floristic successions that took place in Cretaceous forests, especially related to Gondwana. Forests dominated by conifers are compatible with the pollen and macrofloras that have been described from the Santa Marta Formation (Pujana et al 2017;Pujana et al 2018). The characteristics of the charcoal samples, such as the shape of the tracheids, with a rare uniseriate or biseriate alternate pitting, supporting a gymnosperm affinity.…”

Section: Discussionsupporting

confidence: 68%

“…The majority of studies that include fossil woods and descriptions of the palaeoflora from the Santa Marta Formation were published in the last decades, especially from James Ross Island. Most of them refer to vegetation not only with a canopy dominated by conifers (Cantrill & Poole 2005;Pujana et al 2017) but also with an important component of some angiosperms and ferns (Poole & Francis 1999Poole, Cantrill et al 2000;Poole, Gottwald et al 2000;Kvacek & Vodrázka 2016;Pujana et al 2018). Some works briefly mention fossil woods but lack anatomical descriptions (e.g., Cantrill & Poole 2005) or mention gymnosperm fossil woods identified only as conifers because of their poor preservation (e.g., Kvacek & Sakala 2011).…”

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

“…The prospected area was restricted to the north, north-east, north-western and western portions of James Ross Island, around the localities called Brandy Bay, Lachman Crags, Stickle Ridge and Lost Valley, respectively. Pujana et al (2017Pujana et al ( , 2018 conducted a detailed taxonomical review of fossil wood from different strata of the Santa Marta Formation at the Brandy Bay locality in James Ross Island. Regarding gymnosperms, the authors described a new species, Cupressinoxylon rotundum, and also reported the occurrence of Agathoxylon, Phyllocladoxylon antarcticum and Cupressinoxylon hallei, which were previously known for other regions in Antarctica (e.g., Pujana et al 2014).…”

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

“…Pujana et al (2018) described fossil angiosperms from Santa Marta Formation at the same locality, proposing three new species: Paraphyllanthoxylon antarcticum, Weinmannioxylon trichospermoides and Cretaceoxylon heteropunctatum. They also recognized the occurrence of three other angiosperm taxa based on their anatomy: Laurelites jamesrossii, Hedycaryoxylon tambourissoides and Eucryphiaceoxylon eucryphioides (Pujana et al 2018).…”

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

“…the James Ross Island area, where the Santa Marta Formation crops out (Crame et al 1991;Poole & Francis 1999Poole, Cantrill et al 2000;Poole, Gottwald et al 2000;Cantrill & Poole 2005;Poole & Cantrill 2006;Kvacek & Sakala 2011;Leppe et al 2012;Pujana et al 2017;Pujana et al 2018;Pipo et al 2020). However, no palaeobotanical evidence that palaeo-wildfires reached the vegetation in this area has been described so far, although the region as a whole had favourable conditions for fire, for example, abundant vegetation, the presence of ignition sources and adequate pO 2 levels.…”

Section: Introductionmentioning

confidence: 99%

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Wildfires in the Campanian of James Ross Island: a new macro-charcoal record for the Antarctic Peninsula

Lima

Sayão

Ponciano

et al. 2021

polar

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The Cretaceous “high-fire” period was a global event that reached almost all continental masses during that period in Earth’s history. The extensive wildfires directly affected plant communities. Significant palaeobotanical records in the Antarctic Peninsula have been studied from the James Ross Sub-Basin, especially from the Santa Marta Formation. However, there is no described evidence for palaeo-wildfires in the area so far. Here, we present the first occurrence of fossilized macro-charcoal coming from James Ross Island, confirming that palaeo-wildfires occurred in the Campanian vegetation preserved in the Santa Marta Formation. The new charcoal material has a gymnospermous taxonomic affinity, more specifically with the Araucariaceae, which is in accordance with previous palaeobotanical records from James Ross Island. This occurrence adds new information to the construction of the palaeo-wildfire scenario for Gondwana.

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Section: Discussionsupporting

confidence: 68%

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

Section: Geological Setting and Palaeobotanical Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wildfires in the Campanian of James Ross Island: a new macro-charcoal record for the Antarctic Peninsula

Lima

Sayão

Ponciano

et al. 2021

polar

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Cunoniaceae infructescences from the early Eocene Laguna del Hunco flora, Patagonia, Argentina

Matel

Gandolfo

Hermsen

et al. 2022

American J of Botany

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Premise: Two distinct types of fossil infructescences from the early Eocene Laguna del Hunco flora, Chubut Province, Patagonia, Argentina, preserve features of the family Cunoniaceae. The goal of the study was to assess their affinities within Cunoniaceae and to interpret their evolutionary and biogeographical significance. Methods: Specimens were collected from the Tufolitas Laguna del Hunco, Huitrera Formation. They were prepared, photographed, and compared morphologically with similar extant and fossil fruits and infructescences using published literature and herbarium material. Results: The fruit and infructescence morphology place the fossil taxa within Cunoniaceae. They do not conform to any extant genus, supporting the erection of two new fossil genera. Racemofructus gen. nov. shares diagnostic features of the tribe Cunonieae, especially Weinmannia s.l., and exhibits two tribal morphological synapomorphies: a racemose inflorescence and a replum composed of a single column. Cunoniocarpa gen. nov. specimens are paniculate inflorescences with basipetally dehiscent, bicarpellate capsules that have persistent styles and calyces. Its replum morphology suggests an affinity to the tribe Caldcluvieae, particularly to the genus Ackama. Conclusions: The new Patagonian fossils described herein constitute the oldest record of cunoniaceous capsules globally, supplementing a significant body of fossil evidence from pollen, wood, and reproductive structures from southern South America and Antarctica that suggests that the Cunoniaceae were diversified and widely distributed in the southern hemisphere by the early Eocene. Racemofructus and Cunoniocarpa are, respectively, the first fossil records from South America of reproductive structures with affinity to tribes Cunonieae and Caldcluvieae.

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Past changes on fauna and flora distribution

Vega

Olalla‐Tárraga

2020

Past Antarctica

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Angiosperm fossil woods from the Upper Cretaceous of Western Antarctica (Santa Marta Formation)

Cited by 19 publications

References 48 publications

Wildfires in the Campanian of James Ross Island: a new macro-charcoal record for the Antarctic Peninsula

Wildfires in the Campanian of James Ross Island: a new macro-charcoal record for the Antarctic Peninsula

Cunoniaceae infructescences from the early Eocene Laguna del Hunco flora, Patagonia, Argentina

Past changes on fauna and flora distribution

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