I_gotta_rock Posted February 27, 2021 Share Posted February 27, 2021 This one is bugging me!!!! I know this is a brachiopod. I found it at the Reedy Point spoils along the C and D Canal in Delaware. It is 1cm in diameter. I have found two of them in the sand but none of them in the books. I have looked in Weller 1907, Wade 1926, Stephenson 1923, Richards 1958 and 64, and Lauginger 1988. I asked the folks at the repository for the Monmouth Amateur Paleontological Society. No dice. Look familiar to anyone? I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Al Dente Posted February 27, 2021 Share Posted February 27, 2021 Terebratulina cooperi is the common brachiopod from there. This one looks too wide but I found this picture of a similar wide one from the Mount Laurel from this website-https://www.dgs.udel.edu/delaware-geology/lamp-shells-phylum-brachiopoda 1 Link to comment Share on other sites More sharing options...
I_gotta_rock Posted February 27, 2021 Author Share Posted February 27, 2021 19 minutes ago, Al Dente said: Terebratulina cooperi is the common brachiopod from there. This one looks too wide but I found this picture of a similar wide one from the Mount Laurel from this website-https://www.dgs.udel.edu/delaware-geology/lamp-shells-phylum-brachiopoda That is strange. Obviously, T. cooperi is usually teardrop shaped and both mine and the one photo are almost circular. I wonder where they got your picture from and how many round ones they found??? For that matter, why did they put a picture of a Belemnite in that photo set? I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Jeffrey P Posted February 28, 2021 Share Posted February 28, 2021 That looks like an Orthid brachiopod to me, a Rhipidomella (Middle Devonian) or Discomyorthis (Lower Devonian). Devonian specimens (usually corals) are sometimes found in the Cretaceous streams in New Jersey. Any possibility yours could have infiltrated? Link to comment Share on other sites More sharing options...
I_gotta_rock Posted February 28, 2021 Author Share Posted February 28, 2021 49 minutes ago, Jeffrey P said: That looks like an Orthid brachiopod to me, a Rhipidomella (Middle Devonian) or Discomyorthis (Lower Devonian). Devonian specimens (usually corals) are sometimes found in the Cretaceous streams in New Jersey. Any possibility yours could have infiltrated? We do get erratics sometimes, but not this delicate. The stuff we get down here is heavily tumbled, no shell material, only impressions. I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
erose Posted February 28, 2021 Share Posted February 28, 2021 Terabratulinas can have some variation amongst individuals. 2 Link to comment Share on other sites More sharing options...
Jeffrey P Posted February 28, 2021 Share Posted February 28, 2021 17 hours ago, I_gotta_rock said: We do get erratics sometimes, but not this delicate. The stuff we get down here is heavily tumbled, no shell material, only impressions. Is it mineral replaced or original shell? If it is original material then that would argue in favor of it being Cretaceous. I could picture a glacial erratic breaking down and releasing a small brachiopod like that one. Orthid brachiopods tend to weather out intact due to their shape. Link to comment Share on other sites More sharing options...
I_gotta_rock Posted February 28, 2021 Author Share Posted February 28, 2021 21 minutes ago, Jeffrey P said: Is it mineral replaced or original shell? If it is original material then that would argue in favor of it being Cretaceous. I could picture a glacial erratic breaking down and releasing a small brachiopod like that one. Orthid brachiopods tend to weather out intact due to their shape. It is original shell. I have no question that it is cretaceous. Trying to decide if it is some morph of Terebratulina cooperi or something minimally documented. I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
erose Posted March 2, 2021 Share Posted March 2, 2021 I'm thinking the this is missing the pedicle valve which is what makes T. cooperi look tear dropped. 1 Link to comment Share on other sites More sharing options...
I_gotta_rock Posted March 2, 2021 Author Share Posted March 2, 2021 10 hours ago, erose said: I'm thinking the this is missing the pedicle valve which is what makes T. cooperi look tear dropped. No, both valves are usually tear dropped. I have enough articulated pairs to know. 1 I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Al Dente Posted March 2, 2021 Share Posted March 2, 2021 I know there is a lot of variation in the Terebratulina that I find in the Eocene Castle Hayne Formation. Here's some I recently found in a thin layer of sediment. Three brachial valves and a complete brachiopod. 1 Link to comment Share on other sites More sharing options...
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