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  • A new fossil taxon of Asteraceae
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    A new fossil taxon of Asteraceae

    Barreda et al. describe Raiguenrayun cura gen. & sp. nov., an extinct Eocene taxon of the daisy family that might represent the ancestor of Mutisioideae–Carduoideae, based on an exceptionally well preserved capitulescence of Asteraceae recovered from a 47.5 million-year-old formation in north-west Patagonia, Argentina. The new fossil represents the first reliable point for calibration, favouring […] More

  • Evolution and biogeography of Plectocephalus
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    Evolution and biogeography of Plectocephalus

    Evolution and biogeography of Plectocephalus The genus Plectocephalus comprises a single species in Ethiopia, two in North America and possibly four more in South America, in a striking disjunction that is exceptional for genera of the tribe Cardueae. Susanna et al. investigate the phylogeny and interpret the distribution as a migration via Siberia and the […] More