cngodles Posted May 1, 2019 Share Posted May 1, 2019 By far the most detailed Brachiopod I’ve found to date. The top impression, which isn’t shown, appeared to have two larger bands running down the center. The small piece in attachment 3 was somewhat of a steinkern or impression below it. Scale line is 1cm. Photos taken with a DSL through a microscope. This came from eroded Limestone. 2 Fossils of Parks Township - Research | Catalog | How-to Make High-Contrast Photos Link to comment Share on other sites More sharing options...
caldigger Posted May 1, 2019 Share Posted May 1, 2019 I think @Tidgy's Dad would enjoy this one. 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 1, 2019 Share Posted May 1, 2019 I don't know this formation, of course, and lots of these little productids look very similar. I would tentatively suggest Marginifera. 5 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
hemipristis Posted May 1, 2019 Share Posted May 1, 2019 I have 2 of these guys. or what appear very similar, from the Deer Lake site in PA. (Devonian Mahatango Fm). Never did get an ID on 'em 1 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
hemipristis Posted May 1, 2019 Share Posted May 1, 2019 54 minutes ago, Tidgy's Dad said: I don't know this formation, of course, and lots of these little productids look very similar. I would tentatively suggest Marginifera. Spot on, from what I can see after googling Marginifera 2 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 1, 2019 Share Posted May 1, 2019 58 minutes ago, hemipristis said: I have 2 of these guys. or what appear very similar, from the Deer Lake site in PA. (Devonian Mahatango Fm). Never did get an ID on 'em Well, they won't be Marginifera, I'm afraid, the genus doesn't appear in the Devonian as far as I know. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ClearLake Posted May 7, 2019 Share Posted May 7, 2019 Not to muddy the waters, because @Tidgy's Dad is absolutely correct, these productids are difficult to ID, but you may also want to look at two other possible genera: Kozlowskia and Hystriculina. Unfortunately one of the differentiating features is number and arrangement of spines, which do not appear to be preserved on your specimen (at least that I can see in the pictures). Your specimen does have a nicely preserved interior and I have not found yet an illustration that looks just like yours. I'm not sure if there is a publication that addresses your specific Group or Formation in Pennsylvania that might help you narrow down what has been previously reported, as I am referencing an Ohio publication (which should be pretty good for western PA) and Texas (same Pennsylvanian aged seaway at least). 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 7, 2019 Share Posted May 7, 2019 Cngodles,that's some photography. Link to comment Share on other sites More sharing options...
cngodles Posted May 16, 2022 Author Share Posted May 16, 2022 At some point, I found a second one and I identified it as Eomarginifera longispinus. Here is a plate for it. ID: CG-0162 Scale bar = 5 mm. Fossils of Parks Township - Research | Catalog | How-to Make High-Contrast Photos Link to comment Share on other sites More sharing options...
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