evannorton Posted January 27, 2013 Share Posted January 27, 2013 Hi Folks- Any thoughts? I think this is most similar to Lepidodendron rimosum....Pg 107 Wittry.... Evan Link to comment Share on other sites More sharing options...
NetDoc Posted January 27, 2013 Share Posted January 27, 2013 (edited) Awesome find. Can you clean the sand/concretions out of the dimples? Edited January 27, 2013 by NetDoc Pete "NetDoc" Murray Scuba Instructor/Trainer/Evaluator NetDoc@ScubaBoard.com Link to comment Share on other sites More sharing options...
RCFossils Posted January 28, 2013 Share Posted January 28, 2013 Looks like stigmaria Link to comment Share on other sites More sharing options...
AgrilusHunter Posted January 28, 2013 Share Posted January 28, 2013 Hi Evan, I agree with Stigmaria. "They ... savoured the strange warm glow of being much more ignorant than ordinary people, who were only ignorant of ordinary things." -- Terry Pratchett Link to comment Share on other sites More sharing options...
evannorton Posted January 28, 2013 Author Share Posted January 28, 2013 I thought this was stigmata as well, but according to Wittry on pg 120......when in concretions they are poorly preserved.....for some reason I really like this fossil...... Link to comment Share on other sites More sharing options...
evannorton Posted January 28, 2013 Author Share Posted January 28, 2013 Stigmaria - darn autocorrect - hopefully this doesn't cause my hands to start bleeding spontaneously. Link to comment Share on other sites More sharing options...
fiddlehead Posted February 5, 2013 Share Posted February 5, 2013 It is Stigmariodes sp. This is the sub surface left on Psaronius after the root mantle is lost. Psaronius is the form genius name used for all tree fern trunks. The randomly located pits of differing size is the giveaway. Stigmaria has helically arranged circular scars of similar size with a pit or raised dome in the center. They are far less common in the fossil record then the humble Stigmaria. Jack Link to comment Share on other sites More sharing options...
AgrilusHunter Posted February 5, 2013 Share Posted February 5, 2013 It is Stigmariodes sp. This is the sub surface left on Psaronius after the root mantle is lost. Psaronius is the form genius name used for all tree fern trunks. The randomly located pits of differing size is the giveaway. Stigmaria has helically arranged circular scars of similar size with a pit or raised dome in the center. They are far less common in the fossil record then the humble Stigmaria. Jack Hi Jack, Great explanation! I've always been a bit perplexed by these groupings. Now ... I need to go look at all of my Stigmaria. "They ... savoured the strange warm glow of being much more ignorant than ordinary people, who were only ignorant of ordinary things." -- Terry Pratchett Link to comment Share on other sites More sharing options...
RCFossils Posted February 5, 2013 Share Posted February 5, 2013 It is Stigmariodes sp. This is the sub surface left on Psaronius after the root mantle is lost. Psaronius is the form genius name used for all tree fern trunks. The randomly located pits of differing size is the giveaway. Stigmaria has helically arranged circular scars of similar size with a pit or raised dome in the center. They are far less common in the fossil record then the humble Stigmaria. Jack Hi jack,Welcome to the forum! Link to comment Share on other sites More sharing options...
docdutronc Posted February 5, 2013 Share Posted February 5, 2013 (edited) Hi my friends Absolutly no Stigmaria ,the position of scars is random, as Jack said, there is no helical arrangement of rootlets , look also Tubicaulites , here .... STIGMARIOIDES Lesquereux, 1870.Stigmarioides truncatus Lesquereux,1870, p. 453, pl. 29, fig. 4; said to differ from Stigmaria in lack of regularity of appendage arrangement;Pennsylvanian; Mazon Creek, Illinois,U.S.A. TUBICULITES Grand'Eury, 1877.Tubiculites relaxatomaximum Grand'Eury,1877, p. 102; a:pparently a Psaronius stem; no specific designations are given with figures; Upper Carboniferous; France Best regards Bruno Edited February 5, 2013 by docdutronc Link to comment Share on other sites More sharing options...
evannorton Posted February 6, 2013 Author Share Posted February 6, 2013 Awesome explanations. Kudos! Thanks! Link to comment Share on other sites More sharing options...
Stocksdale Posted May 12, 2014 Share Posted May 12, 2014 (edited) Reviving an old thread with a question. From this, I might come to the conclusion that stigmarioides (stigmariodes) and Tubiculites (tubicaulites) are different names for basically the same thing--impressions of the aerial roots of psaronius. Is that a correct conclusion? Edited May 26, 2014 by Neophytus Elginian Somewhere, something incredible is waiting to be known.–Carl Sagan Link to comment Share on other sites More sharing options...
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