Rockaholic Posted September 29, 2013 Share Posted September 29, 2013 This nodule was found in Indiana dating from the late middle Pennsylvanian period. I’m not sure if my ID of Stimaria Eveni is correct. I’m also not sure if Stimaria, like Stigmaria, is also a root fossil. Link to comment Share on other sites More sharing options...
paleoflor Posted September 29, 2013 Share Posted September 29, 2013 Could Stimaria be a spelling error in your information source, i.e. shouldn't it just be Stigmaria eveni Lesquereux? http://www.bgs.ac.uk/Palaeosaurus/Record.cfm?sample_id=570375 http://www.jstor.org/discover/10.2307/2424500?uid=3738736&uid=2129&uid=2&uid=70&uid=4&sid=21102675964601 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Rockaholic Posted September 29, 2013 Author Share Posted September 29, 2013 I was wondering if that were the case but I found it spelled Stimaria in a couple different sources. From the references you’ve given it does seem to be a spelling error. Thanks Could Stimaria be a spelling error in your information source, i.e. shouldn't it just be Stigmaria eveni Lesquereux? http://www.bgs.ac.uk/Palaeosaurus/Record.cfm?sample_id=570375 http://www.jstor.org/discover/10.2307/2424500?uid=3738736&uid=2129&uid=2&uid=70&uid=4&sid=21102675964601 Link to comment Share on other sites More sharing options...
fiddlehead Posted February 23, 2014 Share Posted February 23, 2014 What is shown is corrected called (and spelled) Stigmaroides sp.. A form genus for what we now know to be the sub-surface of the various tree fern trunks of Psaronius. Psaronius had a root mantle of mostly small roots which cascaded down the trunk starting from near the crown and extending to the base. The roots are most commonly found shed from the surface as fossils, which leaves the surface with a random pattern of small bumps. I have seen rare examples of patchy roots attached and flowing along the surface which gives it the appearance of a case of mange. Stigmaroides was erected by Lesquereux thinking it represented an indeterminate rooting structure, hence the similar name to Stigmaria, used for the rooting support structures of arborescent lycopsids. The fact a name is found to be a misnomer, does not invalidate it. Hope this helps, Jack 5 Link to comment Share on other sites More sharing options...
Plantguy Posted February 23, 2014 Share Posted February 23, 2014 Rockaholic, nice find! Regards, Chris Link to comment Share on other sites More sharing options...
evannorton Posted February 24, 2014 Share Posted February 24, 2014 I was just going to reply stigmariodes as well which I learned from jack last year. Link to comment Share on other sites More sharing options...
Rockaholic Posted February 27, 2014 Author Share Posted February 27, 2014 I was surprised to see this post revisited.Thanks for all the informative comments.Looks like I’ll have to revise my gallery ID’s. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now