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400 million-year-old fossil reveals the evolution of Fibonacci spirals in plants
Oxytropidoceras posted a topic in Fossil News
400 million-year-old fossil reveals the evolution of Fibonacci spirals in plants Tejasri Gururaj, June 19, 2023 The paywalled paper is: Turner, H.A., Humpage, M., Kerp, H. and Hetherington, A.J., 2023. Leaves and sporangia developed in rare non-Fibonacci spirals in early leafy plants. Science, 380(6650), pp.1188-1192. Yours, Paul H.-
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- asteroxylon
- devonian
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L.S., As the title says, please show us your fertile plant fossils --- Seeds, pollen organs, sporangia, flowers, cones and a great many other types of fructifications: the plant kingdom is incredibly diverse in terms of reproductive strategies. The vast majority of plant fossils consist of purely vegetative remains, however, making the chance encounter with fertile remains all the more special. I'd love to see your gems! To start off, I'll share some examples from my own collection below. Cheers, Tim DEVONIAN Fertile specimens from the Famennian of Belgium (Evieux Fm.), with Moresnetia, one of the earliest seed plants (left, middle), and Rhacophyton, an early "fern-like" plant (right). CARBONIFEROUS Fertile specimens from the Pennsylvanian of Europe, with: Whittleseya, a medullosalean pollen organ (left), and Crossotheca, lyginopteridalean pollen organs (middle, right) More fertile specimens from Europe, with: unidentified sphenophyte cones (left), Palaeostachya-type (?) sphenophyte cones (middle), and an unidentified lycophyte cone (right). More fertile specimens from Europe, with: unidentified seeds (left, middle) and an unidentified fertile structure (right). More fertile specimens from Europe, with: Cordaianthus, a cone of a Cordaites-type conifer (left), an unidentified fertile frond (middle), and Corynepteris fertile frond (right). PERMIAN Fertile specimens from the Permian of France (Usclas-St. Privat Fm.), with two walchian conifer cones (left, middle) and unidentified seeds (right). TRIASSIC Fertile specimens from the Anisian of Australia (Basin Creek Fm.), with: Pteruchus, an umkomasialean pollen organ (left), a fertile Asterotheca frond (middle), and Stachyopitys, probably a ginkgoopsid pollen organ (right). JURASSIC Fertile specimens from the Jurassic of Germany and Argentina, with Bernettia, a female fructification (left), and a female cone of an Araucaria conifer (right).
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From the album: Coalmine Quarry (Nymboida, Australia)
© T.K.T. Wolterbeek