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• W4386019798 abstract "Acmopyle (Podocarpaceae) comprises two extant species from Oceania that are physiologically restricted to ever-wet rainforests, a confirmed fossil record based on leaf adpressions and cuticles in Australia since the Paleocene, and a few uncertain reports from New Zealand, Antarctica, and South America. We investigated fossil specimens with Acmopyle affinities from the early Eocene Laguna del Hunco site in Patagonia, Argentina.We studied 42 adpression leafy-shoot fossils and included them in a total evidence phylogenetic analysis.Acmopyle grayae sp. nov. is based on heterophyllous leafy shoots with three distinct leaf types. Among these, bilaterally flattened leaves uniquely preserve subparallel, linear features that we interpret as accessory transfusion tissue (ATT, an extra-venous water-conducting tissue). Some apical morphologies of A. grayae shoots are compatible with the early stages of ovuliferous cone development. Our phylogenetic analysis recovers the new species in a polytomy with the two extant Acmopyle species. We report several types of insect-herbivory damage. We also transfer Acmopyle engelhardti from the middle Eocene Río Pichileufú flora to Dacrycarpus engelhardti comb. nov.We confirm the biogeographically significant presence of the endangered West Pacific genus Acmopyle in Eocene Patagonia. Acmopyle is one of the most drought-intolerant genera in Podocarpaceae, possibly due to the high collapse risk of the ATT, and thus the new fossil species provides physiological evidence for the presence of an ever-wet rainforest environment at Laguna del Hunco during the Early Eocene Climatic Optimum." @default.
• W4386019798 created "2023-08-22" @default.
• W4386019798 creator A5016686695 @default.
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• W4386019798 creator A5085206568 @default.
• W4386019798 date "2023-08-01" @default.
• W4386019798 modified "2023-09-23" @default.
• W4386019798 title "A new fossil <i>Acmopyle</i> with accessory transfusion tissue and potential reproductive buds: Direct evidence for ever‐wet rainforests in Eocene Patagonia" @default.
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• W4386019798 doi "https://doi.org/10.1002/ajb2.16221" @default.
• W4386019798 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37598386" @default.

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