The fossil genus Aextoxicoxylon (Magnoliopsida) in the Upper Cretaceous Puntudo Chico Formation, Chubut Province, Argentina

Vera, Ezequiel Ignacio; Loinaze, Valeria Susana Pérez; Llorens, Magdalena; Passalia, Mauro Gabriel

doi:10.1016/j.cretres.2019.104315

Cited by 11 publications

(3 citation statements)

References 33 publications

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“…A limitation of our results is the lack of direct fossil calibrations in the analyses, as no fossil has been confidently assigned to Berberidopsidales (Balthazar & al., 2005;Vera & al., 2020). Previous studies by Magallón & al.…”

Section: Discussionmentioning

confidence: 99%

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Phylogeny of Berberidopsidales based on nuclear and chloroplast loci, with the description of a new species of Berberidopsis endemic to Central Chile

Menegoz,

Villarroel,

Lavandero

2024

TAXON

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Berberidopsidales comprises two families: monotypic Aextoxicaceae (Aextoxicon punctatum in Chile and Argentina) and Berberidopsidaceae. The latter includes Australian monotypic Streptothamnus (S. moorei) and Berberidopsis (B. beckleri in Australia and B. corallina in Chile). A new Berberidopsis species from the Central Chilean Andes is here described. Phylogenetic analyses based on nuclear and chloroplast data clarified the relationships within Berberidopsidales. The new species, Berberidopsis granitica, is sister to the Chilean endemic B. corallina, and this clade is sister to the Australian B. beckleri. The dated molecular phylogeny places the split between the South American B. corallina and B. granitica into the late Miocene/early Pleistocene and the split between South American and Australian Berberidopsis to the late Miocene and Pliocene, suggesting transoceanic dispersal rather than vicariance. Climatic niche analyses show two distinct and non‐overlapping climatic niches for the Australian and southern South American species. Berberidopsis granitica and B. corallina also differ clearly in their habitat and morphology, in addition to their climatic niche. Berberidopsis granitica has a very restricted distribution area and grows in the Andes under montane climatic conditions, unique within Berberidopsidales.

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Section: Discussionmentioning

confidence: 99%

“…We used an optimised relaxed clock (Douglas & al., 2021), and a birth‐death model (Gernhard, 2008) as prior. Since there are no fossils that can be confidently assigned to Berberidopsidales (Balthazar & al., 2005; Vera & al., 2020), we opted for a secondary calibration following Zhang & al. (2020), using 124.92 Ma as the stem age.…”

Section: Methodsmentioning

confidence: 99%

Phylogeny of Berberidopsidales based on nuclear and chloroplast loci, with the description of a new species of Berberidopsis endemic to Central Chile

Menegoz,

Villarroel,

Lavandero

2024

TAXON

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“…The fossil record of insects known for the Late Cretaceous is scarcely known across the globe and, in particular, it is almost inexistent in the Campanian-Maastrichtian interval 1 – 3 . Information on Campanian-Maastrichtian insect diversity in South America consists on nests, pupal chambers, cocoons, and feeding activities on leaves and wood, recovered in central and northern Patagonia 4 – 9 . These occurrences suggest a complex community of terrestrial insects represented by different types of herbivores, pollen feeders, and predators/parasites of scavengers (wasps).…”

Section: Introductionmentioning

confidence: 99%

A Maastrichtian insect assemblage from Patagonia sheds light on arthropod diversity previous to the K/Pg event

Vera,

Monferran,

Massaferro

et al. 2023

Commun Biol

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Insect faunas from the latest Cretaceous are poorly known worldwide. Particularly, in the Southern Hemisphere, there is a gap regarding insect assemblages in the Campanian-Maastrichtian interval. Here we present an insect assemblage from the Maastrichtian Chorrillo Formation, southern Argentina, represented by well-preserved and non-deformed, chitinous microscopic remains including head capsules, wings and scales. Identified clades include Chironomidae dipterans, Coelolepida lepidopterans, and Ephemeroptera. The assemblage taxonomically resembles those of Cenozoic age, rather than other Mesozoic assemblages, in being composed by diverse chironomids and lepidopterans. To the best of our knowledge, present discovery constitutes the first insect body fossils for the Maastrichtian in the Southern Hemisphere, thus filling the gap between well-known Early Cretaceous entomofaunas and those of Paleogene age. The presented evidence shows that modern clades of chironomids were already dominant and diversified by the end of the Cretaceous, in concert with the parallel radiation of aquatic angiosperms which became dominant in freshwater habitats. This exceptional finding encourages the active search of microscopic remains of fossil arthropods in other geological units, which could provide a unique way of enhancing our knowledge on the past diversity of the clade.

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Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina)

Rombola

Greppi

Pujana

et al. 2022

Cretaceous Research

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The fossil genus Aextoxicoxylon (Magnoliopsida) in the Upper Cretaceous Puntudo Chico Formation, Chubut Province, Argentina

Cited by 11 publications

References 33 publications

Phylogeny of Berberidopsidales based on nuclear and chloroplast loci, with the description of a new species of Berberidopsis endemic to Central Chile

Phylogeny of Berberidopsidales based on nuclear and chloroplast loci, with the description of a new species of Berberidopsis endemic to Central Chile

A Maastrichtian insect assemblage from Patagonia sheds light on arthropod diversity previous to the K/Pg event

Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina)

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