Eohostimella heathana is an early, probably terrestrial, "plant" known from compression fossils[2] of Early Silurian age (Llandovery, around 440 to 430 million years ago[3]). The chemistry of its fossils is similar to that of fossilised vascular plants, rather than algae.[2] Its anatomy constitutes upright, cylindrical tubes,[2] with a thickened outer cortex,[4] which might have contained traces of lignin or a similar compound,[2] even though no tracheids or similar vessels have been found;[4] the lignin-like compound was presumably associated with its thick outer cortex.[5] It branched dichotomously and might have borne small spines.[6] It was probably affiliated with the rhyniophytes.[4]
| Eohostimella Temporal range:
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|---|---|
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Stem group: | †Rhyniophytes (?) |
| Genus: | †Eohostimella J.M.Schopf (1966)[1] |
| Species: | †E. heathana
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| Binomial name | |
| †Eohostimella heathana J.M.Schopf (1966)[1]
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References
edit- ^ a b Schopf, J.M.; Mencher, E.; Boucot, A.J. & Andrews, H.N. (1966). "Erect plants in the early Silurian of Maine". In Pecora, W.T. (ed.). Geological Survey Research 1966 : Chapter D. Geological Survey Professional Paper 550-D. Washington: US Government Printing Office. pp. D69–D75. OCLC 429539130. Retrieved 2011-04-07.
- ^ a b c d Niklas, Karl J. (1976). "Chemical Examinations of Some Non-Vascular Paleozoic Plants". Brittonia. 28 (1). New York Botanical Garden Press: 113–137. Bibcode:1976Britt..28..113N. doi:10.2307/2805564. JSTOR 2805564. S2CID 21794174.
- ^ Edwards, D. & Wellman, C. (2001), "Embryophytes on Land: The Ordovician to Lochkovian (Lower Devonian) Record", in Gensel, P. & Edwards, D. (eds.), Plants Invade the Land : Evolutionary and Environmental Perspectives, New York: Columbia University Press, pp. 3–28, ISBN 978-0-231-11161-4, p. 4
- ^ a b c Niklas, Karl J. (1979). "An Assessment of Chemical Features for the Classification of Plant Fossils". Taxon. 28 (5/6). International Association for Plant Taxonomy (IAPT): 505–516. doi:10.2307/1219787. JSTOR 1219787.
- ^ Niklas, Karl J.; Gensel, Patricia G (1976). "Chemotaxonomy of Some Paleozoic Vascular Plants. Part I: Chemical Compositions and Preliminary Cluster Analyses". Brittonia. 28 (3). New York Botanical Garden Press: 353. Bibcode:1976Britt..28..353N. doi:10.2307/2805800. JSTOR 2805800. S2CID 30834065.
- ^ Taylor, Thomas N. (1982). "The origin of land plants — a paleobotanical perspective" (PDF). Taxon. 31 (2). International Association for Plant Taxonomy (IAPT): 155–177. doi:10.2307/1219982. JSTOR 1219982. Archived from the original (PDF) on 2010-06-18. Retrieved 2009-01-23.
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