Vin Posted August 3, 2020 Share Posted August 3, 2020 Hello everyone, These were all found in St. Claire, PA. Mahantango Formation. Anybody know what these are? #1. Looks like octopus suckers in brown outline. Is it a coral? #2. Crinoid star stems? #3. Cylindrical molds, what are these? Link to comment Share on other sites More sharing options...
Vin Posted August 3, 2020 Author Share Posted August 3, 2020 #4. Looks like a brown burrow but segmented. Another crinoid? #5. Looks like an iron filled brachiopod or clam? #6. Some brachiopod? 1 Link to comment Share on other sites More sharing options...
Vin Posted August 3, 2020 Author Share Posted August 3, 2020 #7. Starfish? #8. Trilobite? #9. Another trilobite? #10. Segmented trace. Trilobite or something else? Link to comment Share on other sites More sharing options...
Huntonia Posted August 4, 2020 Share Posted August 4, 2020 51 minutes ago, Vin said: These appear to be orthocone nautiloids. 1 Link to comment Share on other sites More sharing options...
connorp Posted August 4, 2020 Share Posted August 4, 2020 I agree that #3 are orthoconic nautiloids. Maybe #4 as well, not entirely sure from the picture though. #6 is a nice looking spiriferid brachiopod, maybe @Tidgy's Dad will have an idea on the species. 2 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted August 4, 2020 Share Posted August 4, 2020 Mucrospirifer. Probably Mucrospirifer mucronatus. 4 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Vin Posted August 4, 2020 Author Share Posted August 4, 2020 Thanks guys! Link to comment Share on other sites More sharing options...
FossilizedJello Posted August 6, 2020 Share Posted August 6, 2020 I do believe they are trilobite sections from the body. Looking forward to seeing if anything else gets IDed 1 Link to comment Share on other sites More sharing options...
EMP Posted August 7, 2020 Share Posted August 7, 2020 @Vin 1 - Looks like some kind of invertebrate burrow, looking at it top down. A closer picture might make a difference though. The "corals" may be bryozoans. 2 - Looks to be a crinoid stem 3 - Mold of a straight shelled nautiloid is my guess 4 - Infilled burrow I believe 5 - I think that's mineral staining 6 - Mucrospirifer mucronatus 7 - That's actually the tips of a brachiopod sticking out from the shale. Imagine looking at a sea shell head on (from the side) 8 - Looks like part of a Dipleura dekayi thorax. Cool find! 9 - Same as above 10 - Too big for a Tentaculites sp., at least from what I've seen in the Mahantango. Maybe another straight shelled nautiloid, Michelinoceras sp.? 1 Link to comment Share on other sites More sharing options...
Vin Posted August 29, 2020 Author Share Posted August 29, 2020 On 8/6/2020 at 11:21 PM, EMP said: @Vin 1 - Looks like some kind of invertebrate burrow, looking at it top down. A closer picture might make a difference though. The "corals" may be bryozoans. 2 - Looks to be a crinoid stem 3 - Mold of a straight shelled nautiloid is my guess 4 - Infilled burrow I believe 5 - I think that's mineral staining 6 - Mucrospirifer mucronatus 7 - That's actually the tips of a brachiopod sticking out from the shale. Imagine looking at a sea shell head on (from the side) 8 - Looks like part of a Dipleura dekayi thorax. Cool find! 9 - Same as above 10 - Too big for a Tentaculites sp., at least from what I've seen in the Mahantango. Maybe another straight shelled nautiloid, Michelinoceras sp.? Thanks a lot for the Identification, the trilobites made me really happy! Cheers Link to comment Share on other sites More sharing options...
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