Denis Arcand Posted May 13, 2022 Share Posted May 13, 2022 (edited) Hi, I am still new at identifying brachiopods, I know there is a great diversity of similar species, which makes it even more difficult for me. Can you help me identify these two brachiopods, they both feature a semicircular outline, concavo-convex profile, and small size (~1.0 cm wide). They also have a wide, straight hinge numerous and very fine lines and ribs. Not sure if they are the same species, one of them has a larger size with a bit smaller width compared to length. So I don't think they are the same species. The plate was found in the Nicolet River Formation south of Montreal, QC Any help would be appreciated, thanks ! Edited May 14, 2022 by Denis Arcand 2 One fossil a day will keep you happy all day. Welcome to the FOSSIL ART Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted May 13, 2022 Share Posted May 13, 2022 I can't help with ID, but that is a beautiful hash plate. 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...
Tidgy's Dad Posted May 14, 2022 Share Posted May 14, 2022 (edited) Both Sowerbyella sericea, I would think. It's quite a variable species. Edited May 14, 2022 by Tidgy's Dad Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 14, 2022 Share Posted May 14, 2022 14 minutes ago, Tidgy's Dad said: Both Sowerbyella sericea, I would think. It's quite a variable species. Hmm. I would think the lighter one would be a Strophomenid, either Strophomena sp. or Rafinesquina sp. ??? 2 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...
Tidgy's Dad Posted May 14, 2022 Share Posted May 14, 2022 Yes. Thanks, Tim. Strophomena has a concave brachial valve and a convex pedicle valve. Rafinesquina has the reverse. This valve is convex and also has pointed cardinal extremities, I'm not sure if it's a brachial or pedicle valve. Maybe that's an erosion exposed part of the sealed over pedicle foramen visible at the centre of the posterior margin? (adult strophomenids don't have a pedicle opening) If so, it maybe Strophomena sp. with S. huronensis a possible candidate. 4 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Denis Arcand Posted May 17, 2022 Author Share Posted May 17, 2022 (edited) Great, not only do I get free IDs , but you also give me great clues on how to tell the different species apart. This is exactly what I need, I always have a hard time telling brachiopods apart, because a lot of them look alike (at least for me) and I always have a hard time finding that kind of clue on the internet, and with the name that you gave me I can refine my search. Thank you very much @Tidgy's Dad and @Fossildude19 for your help in identifying my little find. I will surely ask for other brachiopod identifications when time permits Edited May 17, 2022 by Denis Arcand 2 One fossil a day will keep you happy all day. Welcome to the FOSSIL ART Link to comment Share on other sites More sharing options...
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