da_capo Posted October 30, 2020 Share Posted October 30, 2020 Hi all Im trying to label the morphological parts of a Lepidodendron stem in thin section for my course. I have found a half decent resource online BUT it is unreadable due to the resolution. I was wondering if anyone was confident enough to clear up the labelling lines for me? pic attached. cheers Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 30, 2020 Share Posted October 30, 2020 Leaf Base Periderm Outer Cortex Middle Cortex Secretory Zone Leaf trace Metaxylem Protoxylem Secondary Xylem Phloem Inner Cortex. 2 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...
da_capo Posted October 30, 2020 Author Share Posted October 30, 2020 (edited) Thank you! Additional questions: Is the metaxylem the central part? I thought that was the pith cavity? Is the protoxylem the white part surrounding what's labelled the metaxylem or is it the periphery of the metaxylem part? Also can anyone figure out where the outer cortex and periderm labels are pointing? Is it that the outer cortex is the more pitted part and the periderm the more striated? Last one... The inner cortex and secretory zone look to be pointing to the same part UNLESS it is that the secretory zone is on the periphery of the inner cortex? Any thoughts and insight are most valued! Edited October 30, 2020 by da_capo Link to comment Share on other sites More sharing options...
Top Trilo Posted October 30, 2020 Share Posted October 30, 2020 According to the image the metaxylem is the center, I believe the protoxylem is the white part because there is nothing else pointing to that area As far as the outer cortex and periderm go I don't know they're both pointing to the same thing in my opinion I believe the secretory zone is the periphery of the inner cortex. This is all based on the photo. “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 30, 2020 Share Posted October 30, 2020 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...
Mark Kmiecik Posted November 3, 2020 Share Posted November 3, 2020 On 10/30/2020 at 3:25 PM, da_capo said: Is the metaxylem the central part? I thought that was the pith cavity? A pith "cavity" is a hole with nothing in it. It is a hollow volume. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
paleoflor Posted November 5, 2020 Share Posted November 5, 2020 Have a look at the works of DiMichele, e.g.: https://www.jstor.org/stable/2419138?seq=1 https://www.researchgate.net/publication/277957553_Arborescent_lycopsids_of_Pennsylvanian_age_coals_Lepidodendron_dicentricum_C_FELIX Tim Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
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