paleoflor Posted August 12 Share Posted August 12 L.S., Instead of a regular "pointy end", the below pinnule of Macroneuropteris scheuchzeri shows a forked end, plus also a smaller lateral pointed structure on the left. Not sure what may have caused this aberrant pinnule-shape, some kind of pathology perhaps? I was wondering whether others have found similar, deviating leaf shapes. Would love to see your examples or hear your thoughts about this one. Kind regards, Tim 3 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted August 12 Share Posted August 12 (edited) Insect damage? Injured early in growth stage? Viral or fungal damage? Fire/lightning/volcanic damage? Edited August 12 by Mark Kmiecik 1 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...
connorp Posted August 12 Share Posted August 12 Wow, very cool. These pinnules can take weird shapes but this is by far the weirdest I've ever seen. Link to comment Share on other sites More sharing options...
paleoflor Posted August 13 Author Share Posted August 13 L.S., Let me add another one with unusual shape. This Alethopteris pinnule is not necessarily an aberration, as it may just originate from a specific position in the frond where the architecture changes from bipinnate to tripinnate (or higher order). Not sure... In any case, on the left side this specimen consists of a pinna with four lateral pinnules, while on the right side the terminal pinnule continues undivided. Cheers, Tim 1 2 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted August 13 Share Posted August 13 Possibly pathogenic? 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...
Jaybot Posted August 14 Share Posted August 14 Whatever caused it, very cool. 1 -Jay “The earth doesn't need new continents, but new men.” ― Jules Verne, Twenty Thousand Leagues Under the Sea Link to comment Share on other sites More sharing options...
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