Mainefossils Posted March 20, 2021 Share Posted March 20, 2021 This is another fossil from the Silurian Leighton Fm, Maine. It is an excellently preserved internal and external mold of a brachiopod. It is similar to the Salopina species that I am constantly finding in this formation, but this brachiopod's valve is more strongly curved, instead of almost flat. It also has less numerous striae, and they almost reach the median process. As well as this, the dental plate is thinner and curves inward more strongly, and the ctenophoridium is wider. Any help on its identification would be greatly appreciated. Here are some pictures of it (internal mold on the left, external on the right): 1 3 The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
Rockwood Posted March 20, 2021 Share Posted March 20, 2021 2 hours ago, Mainefossils said: It is an excellently preserved internal and external mold of a brachiopod. External overprinted on the internal ? 1 Link to comment Share on other sites More sharing options...
Mainefossils Posted March 20, 2021 Author Share Posted March 20, 2021 That is a possibility, but I have multiple specimens with the same structural features, so it seems like it is actually the internal mold of the brachiopod. Thanks for your help! The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
westcoast Posted March 20, 2021 Share Posted March 20, 2021 Beautiful specimens 1 Link to comment Share on other sites More sharing options...
Mainefossils Posted July 30, 2021 Author Share Posted July 30, 2021 @Rockwood and @Tidgy's Dad, it's been a while, but I have finally identified this brachiopod as Salopina submedia. The plate below shows this species. From: Walmsley, V. G., Boucot, A. J., Harper, C. W. (1969) Silurian and Lower Devonian Salopinid Brachiopods. Journal of Paleontology, 43(2). Species description from the same paper, "Almost planoconvex, barely sulcate Salopina having a circular outline. Medium corse costellae radiate and curve laterally so that the posterior costellae of the branchial valve intersect the posterior margin at a considerable angle. Branchiophores moderately thick, straight blades." 3 The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 30, 2021 Share Posted July 30, 2021 Well done.. A lovely brachiopod. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
sixgill pete Posted August 1, 2021 Share Posted August 1, 2021 wow. Those are gorgeous! 1 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...
Bobby Rico Posted August 1, 2021 Share Posted August 1, 2021 Now that’s a Bobby dazzler , nice find. 1 Link to comment Share on other sites More sharing options...
Mainefossils Posted August 1, 2021 Author Share Posted August 1, 2021 Thanks so much everyone! The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
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