Mattalic Posted May 30, 2016 Share Posted May 30, 2016 Dime for scale. Been trying to find an example on http://paleobiology.si.edu/mazoncreek/mazonGroups.html Link to comment Share on other sites More sharing options...
Auspex Posted May 30, 2016 Share Posted May 30, 2016 I can offer no more than that it is a fertile frond; can't name the species. Nice! "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...
Darktooth Posted May 30, 2016 Share Posted May 30, 2016 Good specimen! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Mattalic Posted May 30, 2016 Author Share Posted May 30, 2016 I can offer no more than that it is a fertile frond; can't name the species. Nice!~.jpg Thanks for the brightening! Link to comment Share on other sites More sharing options...
sixgill pete Posted May 30, 2016 Share Posted May 30, 2016 Wow! Fantastic specimen. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
digit Posted May 30, 2016 Share Posted May 30, 2016 Can't recall ever seeing fertile frond fossils from Mazon Creek before. At least we know it is a true fern and not a "seed" fern. Cool specimen--thanks for sharing. Cheers. -Ken Link to comment Share on other sites More sharing options...
Raggedy Man Posted May 30, 2016 Share Posted May 30, 2016 Are you 100% sure this is from the Mazon Creek? ...I'm back. Link to comment Share on other sites More sharing options...
Mattalic Posted May 30, 2016 Author Share Posted May 30, 2016 (edited) Are you 100% sure this is from the Mazon Creek? 99.99%. I had a bucket full of nodules, all producing typical specimens. This one my wife cracked open and I was shocked at the pattern and posted immediately. The nodules went through 3 winters of freeze-thaw. Edited May 30, 2016 by Mattalic Link to comment Share on other sites More sharing options...
Mattalic Posted May 30, 2016 Author Share Posted May 30, 2016 Other nodules from the same bucket. Link to comment Share on other sites More sharing options...
Plantguy Posted May 30, 2016 Share Posted May 30, 2016 Thats a cool find...I'm gonna defer on this one to the real plant experts...if I had to guess I'd say one of the Pecopterid based on the general form and arrangement but am not certain. I'll follow this thread to see if someone in the real know can say. Thanks for showing us... Regards, Chris Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 30, 2016 Share Posted May 30, 2016 Great specimen. Maybe Jack will have a look at this and know what it is. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
abyssunder Posted May 30, 2016 Share Posted May 30, 2016 Pecopteris sp., or maybe Eusphenopteris neuropteroides / Pseuopecopteis anceps ? " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
fiddlehead Posted May 30, 2016 Share Posted May 30, 2016 It is a fertile Diplazites unita. Fully half the examples of this taxon found at Mazon Creek are fertile. The main feature which separates Diplazites from the other true fern taxa, is each synangium (sorus) is made up of six sporangium versus other true fern genera with 4-5. This example may or may not show this due to preservation, but the well marked, even synangium layout and united pinnules is diagnostic. Though you did not ask, the use of Pecopteris should be restricted to sterile examples of plants with pinnules connected by their entire base with rather rudimentary venation and importantly in most cases we do not know it's fertile form. The name Pecopteris as presently used, is a sterile plant form, not a natural group. Members do not need to be even a true fern. In most cases of true ferns where the fertile structures are known, the name is other than Pecopteris. This is becoming more the case all the time as progress is made in understanding natural plant groups. As with this case, the correct genus name is based partly on it's fertile structures. Aren't you glad you didn't ask. Hope this helps, Jack 13 Link to comment Share on other sites More sharing options...
Mattalic Posted May 30, 2016 Author Share Posted May 30, 2016 Jack, thank you very much for the information. Link to comment Share on other sites More sharing options...
Raggedy Man Posted May 30, 2016 Share Posted May 30, 2016 Thanks Jack. Does your flora book contain examples of this type of specimen? ...I'm back. Link to comment Share on other sites More sharing options...
Mattalic Posted May 31, 2016 Author Share Posted May 31, 2016 (edited) Thanks Jack. Does your flora book contain examples of this type of specimen? Page 3 of his .pdf Mazon Creek guide shows a fertile Diplazites unita. His example is much clearer. Edited May 31, 2016 by Mattalic Link to comment Share on other sites More sharing options...
fifbrindacier Posted May 31, 2016 Share Posted May 31, 2016 I can offer no more than that it is a fertile frond; can't name the species. Nice!~.jpg I agree with a frond. It's a very nice find, thanks for posting it. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
abyssunder Posted May 31, 2016 Share Posted May 31, 2016 Page 3 of his .pdf Mazon Creek guide shows a fertile Diplazites unita. His example is much clearer. That is a very nice example. Pennsylvanian Age Fossils of Northeastern Illinois, USA Flora of the Mazon Creek Region The Field Museum Produced by: Jack Wittry, Field Associate, and Ian Glasspool, Adjunct Curator & Paleobotany Collections Manager, The Field Museum Photos © Jack Wittry; [wittryj@yahoo.com] © The Field Museum, Chicago, IL 60605 USA. [http:idtools.fieldmuseum.org] (12/2013) " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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