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Found 7 results

  1. Misha

    Archaeopteris frond

    From the album: Misha's Late Devonian Fossils

    Archaeopteris sp. Early progymnosperm frond and other plant debris Fammenian Catskill Formation Pennsylvania
  2. oilshale

    Archaeopteris sp.

    Taxonomy from Fossilworks.org. Synonym: Palaeopteris Schimper 1869. The fossil wood known as Callixylon and the leaves known as Archaeopteris are actually part of the same plant. Diagnosis for Archaeopteris from Anderson et al. 1995, p. 310: “The sterile branching systems bear leaves attached either directly to the penultimate branch or to the ultimate branch. The leaves which flare from a narrow base become flabellate and rounded distally, and vary from nearly entire to deeply dissected (Beck, 1981: 199). The present collection fits more into the dissected end of the range. The fertile -branching systems produced ultimate fertile branches bearing leaves on the adaxial surface of which were borne sporangia and on occasion, basal and/or apical leaves which functioned primarily as photosynthetic organs. The new fertile material also bears sporangia on the adaxial surface of the leaves of the ultimate fertile branches and furthermore a few leaves also occur directly on the branch.” Line drawing of Archaeopteris from Beck 1962, p. 374: References: Beck, CB (1960). "The identity of Archaeopteris and Callixylon". Brittonia. 12 (4): 351–368. doi:10.2307/2805124. Beck, CB (1962). "Reconstructions of Archaeopteris, and further consideration of its phylogenetic position". American Journal of Botany. 49 (4): 373–382. doi:10.1002/j.1537-2197.1962.tb14953.x. hdl:2027.42/141981. JSTOR 2439077. Beck, CB (1981). Archaeopteris and its role in vascular plant evolution. In: Niklas KJ, ed. Paleoebotany, Paleoecology, and Evolution, Vol. 1. New York: Praeger, 193-230. Anderson, H. M., Hiller, N. & Gess, R. W. (1995) Archaeopteris (Progymnospernopsida) from the Devonian of southern Africa. Botanical Journal of the Linnean Society 1995, I I7: 305 320. With 37 figures.
  3. HynerpetonHunter

    Archaeopteris

    From the album: Catskill Formation PA fossils

    A nice, rare Archaeopteris obtusa from Red Hill, Apr. 15, 2022
  4. HynerpetonHunter

    Plants of Red Hill

    From the album: Catskill Formation PA fossils

    Plants from Red Hill, including Archaeopteris, Rhacophyton, and Ozinachsonia
  5. The world's oldest fossilized forest is in Greene County. It needs saving. Roger Hannigan Gilson, Times Union, Aug. 5, 2021 The world’s oldest known fossil forest has been discovered in a quarry in upper New York state By Kelly Murray, CNN, December 20, 2019 The open access paper is: Stein, W.E., Berry, C.M., Morris, J.L., Hernick, L.V., Mannolini, F., Ver Straeten, C., Landing, E., Marshall, J.E., Wellman, C.H., Beerling,D.J. and Leake, J.R., 2020. Mid-Devonian Archaeopteris roots signal revolutionary change in earliest fossil forests. Current biology, 30(3), pp.421-431. open access Yours, Paul H.
  6. archeo

    The first forests

    Hello, I just uploaded my last short film on the first forests of the Middle Devonian. Automatic English subtitle translation doesn't sound too bad.
  7. RomanK

    Devonian Sites At Donbass Region

    Site No1 Razdolneview Site views Volcanogenic tuffs There are two type os fossils: compessed prints and petrified wood. Prints Petwood Cell structure of the tissue Site No2 Styla Styla lake Devonian outcrops Palaeovolcano (Maph-Khaya mnt.) Lepidodendropsis prints Look more pictures in my gallery 1 and gallery 2.
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