Rainforest conifers of Eocene Patagonia: attached cones and foliage of the extant Southeast Asian and Australasian genus Dacrycarpus (Podocarpaceae)

American Journal of Botany
Peter Wilf

Abstract

Eocene caldera-lake beds at Laguna del Hunco (LH, ca. 52.2 Ma) and Río Pichileufú (RP, ca. 47.7 Ma) in Argentine Patagonia provide copious information about the biological history of Gondwana. Several plant genera from these sites are known as fossils from southern Australia and New Zealand and survive only in Australasian rainforests. The potential presence of Dacrycarpus (Podocarpaceae) holds considerable interest due to its extensive foliage-fossil record in Gondwana, its remarkably broad modern distribution in Southeast Asian and Australasian rainforests, its high physiological moisture requirements, and its bird-dispersed seeds. However, the unique seed cones that firmly diagnose Dacrycarpus were not previously known from the fossil record. I describe and interpret fertile (LH) and vegetative (LH and RP) material of Dacrycarpus and present a nomenclatural revision for fossil Dacrycarpus from South America. Dacrycarpus puertae sp. nov. is the first fossil occurrence of the unusual seed cones that typify living Dacrycarpus, attached to characteristic foliage, and of attached Dacrycarpus pollen cones and foliage. Dacrycarpus puertae is indistinguishable from living D. imbricatus (montane, Burma to Fiji). Dacrycarpus chilensis...Continue Reading

References

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Citations

Jun 9, 2018·American Journal of Botany·Nathan A JudMaria A Gandolfo
Aug 4, 2012·American Journal of Botany·Elizabeth J HermsenMaría del Carmen Zamaloa
Jan 15, 2014·American Journal of Botany·Peter WilfAri Iglesias
Aug 30, 2018·American Journal of Botany·Andrew B LeslieSarah Mathews
May 11, 2020·American Journal of Botany·Gabriella Rossetto-HarrisAna Andruchow-Colombo
Nov 27, 2020·Communications Biology·Michael P DonovanConrad C Labandeira
Nov 29, 2020·American Journal of Botany·Rocío DeannaMaria A Gandolfo
Jan 26, 2021·Royal Society Open Science·Eugenia Romero-LebrónJulián F Petrulevičius
Dec 5, 2020·American Journal of Botany·Maria C ZamaloaKevin C Nixon
Jun 10, 2018·American Journal of Botany·Peter WilfMaría A Gandolfo
Nov 7, 2021·Molecular Phylogenetics and Evolution·Luo ChenXiao-Quan Wang

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