Sphenophyllum compression
WebNov 1, 2024 · The main problems in interpreting sphenophyllalean cones and spores are: (1) they are found as compression–impressions, as well as petrified and three-dimensionally preserved; in situ spores sometimes offer a good chance for a proper classification of some sphenophyllalean cones and it is possible to synonymize some “leaf species” when leafy … WebSphenophyllum Brongniart, 1828 is the best-known representative of Sphenophyllales, an extinct order of small plants belonging to the Sphenophytes, the group that contains extant horsetails. Sphenophyllum is known from the Devonian to the Triassic, but most specimens are late Carboniferous in age and the anatomy of specimens present at other times is …
Sphenophyllum compression
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WebJan 16, 2024 · The generic name Sphenophyllum was initially used for Carboniferous-Permian impression-compression specimens of wedge-shaped leaves borne in whorls. … WebPHILLIPS-SPHENOPHYLLUM CONSTRICTUM 5 between this tissue and the leaf base. The cortical dimensions are extremely flexible due to secondary growth which resulted in internal compression and eventual decortication. Parenchymatous tissue of the cortex and leaf is bounded by a layer of rectangu-
WebBatenburg, L.H. 1977. The Sphenophyllum species in the Carboniferous flora of Holz (Westphalian D, Saar Basin, Germany). Review of Palaeobotany and Palynology 24, 69–99. View article. Batenburg, L.H. 1981. Vegetative anatomy and ecology of Sphenophyllum zwickaviense, S. emarginatum, and other “compression species” of Sphenophyllum. http://www.geologia-croatica.hr/ojs/index.php/GC/article/view/GC.2015.01
WebVegetative anatomy and ecology of Sphenophyllum zwickaviense, S. emarginatum, and other "compression species" of Sphenophyllum. Review of Palaeobotany and Palynology … WebSep 1, 1997 · The floristics of a recently discovered plant compression assemblage from the Lower Carboniferous Russchiefer of Saalfeld in Thuringia, Germany, is documented and compared with existing compression floras of Tournaisian age. ... 1924). A number of species traditionally placed in the genera Sphenopter& and PLATE I 1. Sphenophyllum sp. …
WebCompression specimens of Sphenophyllum char-acteristically have jointed stems with whorls of six to nine cuneate, dichotomously veined leaves. Such specimens have appeared in paleobotanical literature since the time of SCHEUCHZER'S Her-barium Diluvianum ( 1723 ), and over 58 "species" have been described on the basis of observed vari-
WebSphenophyllales are small, slender branching plants, usually growing to a height of less than 1 m (3.3 ft) tall. The long stems range from 0.5 cm (0.20 in) to 1.2 cm (0.47 in) in diameter. The stems are jointed and ribbed with weak habits, making it probable that these plants were vine or shrub-like when alive, and formed a portion of the ... everyonetm essential oilWebImpression-compression specimens of Spheno- phyllum are usually characterized by jointed lon- gitudinally ridged stems bearing whorls of super- imposed leaves at each node. … everyone three in one soapbrown protein fillerWebApr 1, 1982 · The "compression species" of Sphenophyllum, or a majority of them, are to be reconstructed as scramblers (Batenburg, 1981). If the adventitious roots in "petrifaction species" are aerial roots (Snigirevskaja, 1959) or cling- ing roots (Baxter, 1948), these species may have been scramblers as well, but with a different type of attachment … everyone timeWebAug 29, 2024 · In the Montagne Noire region of France, compression specimens of Sphenophyllum sp. have been described from Tournaisian deposits ( Rowe & Galtier … brown psychology stawellWebTwo compression floras have been discovered below the Brush Creek marine unit (lower Conemaugh) in Columbiana County, Ohio. ... The assemblage includes Sphenophyllum oblongifolium, Pecopteris candolleana, Danaeites emersonii and Odontopteris brardii, taxa previously recorded from younger strata. The second assemblage occurs within a 1.5-m … everyone together aboriginal affairs strategyWebAug 29, 2024 · Sphenophyllum Brongniart, 1828 is the best-known representative of Sphenophyllales, an extinct order of small plants belonging to the Sphenophytes, the … everyonetm face toner