docdutronc Posted November 22, 2008 Share Posted November 22, 2008 sigillaria elegans from Somain France,westphalian A ...... Link to comment Share on other sites More sharing options...
mommabetts Posted November 22, 2008 Share Posted November 22, 2008 Those are amazing with very good detail. Link to comment Share on other sites More sharing options...
Auspex Posted November 22, 2008 Share Posted November 22, 2008 Such a variety! How many species of Sigillaria have been described? How many of those might be different layers of bark from the same tree? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
docdutronc Posted November 22, 2008 Author Share Posted November 22, 2008 Such a variety! How many species of Sigillaria have been described? How many of those might be different layers of bark from the same tree? Most species who are draw on this picture are present in my collection ,some are very uncommon ,leafs cushions could be very different in the basal part ,the middle trunk or near the summit ..... Link to comment Share on other sites More sharing options...
Guest solius symbiosus Posted November 22, 2008 Share Posted November 22, 2008 I don't want to "speak" for Auspex, but I think he meant if some of the different specie names attributed to Sigillaria could be the same plant, but one of the 6(?) inner layers of bark. Sort of like how Annularia and Calamites come from the same plant. Link to comment Share on other sites More sharing options...
docdutronc Posted November 22, 2008 Author Share Posted November 22, 2008 I don't want to "speak" for Auspex, but I think he meant if some of the different specie names attributed to Sigillaria could be the same plant, but one of the 6(?) inner layers of bark.Sort of like how Annularia and Calamites come from the same plant. Yes I agree,the autors have multiplyed the species in genus sigillaria ,but some of these barks are typical of a geological level ...,so in french we say "different stade ontogénique de croissance ",you know this word in american : ontogeny Link to comment Share on other sites More sharing options...
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