tbwampler Posted May 11, 2020 Share Posted May 11, 2020 Hi, these were found in limestone shale in a canyon in Western Montana. Do you think these are crinoid columns, some kind of annelid, or other? Thanks! Link to comment Share on other sites More sharing options...
Pippa Posted May 11, 2020 Share Posted May 11, 2020 It would be helpful to have a closeup of one of the more detailed fossils. But I'd say these are graptolites, or the arms of graptolites. Link to comment Share on other sites More sharing options...
tbwampler Posted May 11, 2020 Author Share Posted May 11, 2020 7 minutes ago, Pippa said: It would be helpful to have a closeup of one of the more detailed fossils. But I'd say these are graptolites, or the arms of graptolites. Link to comment Share on other sites More sharing options...
piranha Posted May 11, 2020 Share Posted May 11, 2020 Conkin, J.E., Conkin, B.M. 1968 Scalarituba missouriensis and its stratigraphic distribution. The University of Kansas Paleontological Contributions, 31:1-7 PDF LINK 6 Link to comment Share on other sites More sharing options...
Pippa Posted May 11, 2020 Share Posted May 11, 2020 20 minutes ago, piranha said: Conkin, J.E., Conkin, B.M. 1968 Scalarituba missouriensis and its stratigraphic distribution. The University of Kansas Paleontological Contributions, 31:1-7 PDF LINK Of course! That should teach me to look carefully at the posted photos in future. How could I miss the rulers? The large sizes alone and especially combined with the wiggly shapes should have been indication enough that these are not graptolites. Oh well, live and learn... Link to comment Share on other sites More sharing options...
fossilcrazy Posted May 11, 2020 Share Posted May 11, 2020 My take on your unidentified specimen is Titusvilla drakei, which is a odd form of Sponge. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted May 11, 2020 Share Posted May 11, 2020 2 hours ago, fossilcrazy said: My take on your unidentified specimen is Titusvilla drakei, which is a odd form of Sponge. Shrinkage of the body would explain the gaps in the form. Definitely worth consideration. Link to comment Share on other sites More sharing options...
Wrangellian Posted May 11, 2020 Share Posted May 11, 2020 I remember things like this from when chele was busy showing us her collection from the Paleocene of that area, and I think those were ID'd as Scalarituba at the time. Now I guess we need to know what age rock these come out of. Paleocene and Carboniferous are pretty mutually exclusive, so knowing the age would go a long way to IDing these. I know that Montana has both. 1 Link to comment Share on other sites More sharing options...
tbwampler Posted May 11, 2020 Author Share Posted May 11, 2020 23 minutes ago, Wrangellian said: I remember things like this from when chele was busy showing us her collection from the Paleocene of that area, and I think those were ID'd as Scalarituba at the time. Now I guess we need to know what age rock these come out of. Paleocene and Carboniferous are pretty mutually exclusive, so knowing the age would go a long way to IDing these. I know that Montana has both. These are from Mississippian limestone. Link to comment Share on other sites More sharing options...
piranha Posted May 11, 2020 Share Posted May 11, 2020 The 'cup' morphology for Titusvillia is incorrect. The illustrations are only idealized reconstructions. According to the literature / Treatise E: Titusvillia is only described from Pennsylvania and New York. Caster, K.E. 1939 Siliceous Sponges from Mississippian and Devonian Strata of the Penn-York Embayment. Journal of Paleontology, 13(1):1-20 1 Link to comment Share on other sites More sharing options...
Wrangellian Posted May 12, 2020 Share Posted May 12, 2020 15 hours ago, tbwampler said: These are from Mississippian limestone. OK.. Now I see that Scalarituba is from the late Paleozoic, like the sponge. I should go back and find the ones chele posted... EDIT: Chele's thing was different, and definitely from the Paleocene Ft. Union Fm. It was only suggested that that thing was similar to Scalarituba (which shows how fuzzy my memory can be). Anyway, nice find there, whatever it is! Link to comment Share on other sites More sharing options...
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