minnbuckeye Posted May 4, 2018 Share Posted May 4, 2018 I collect in Coralville Iowa frequently and always run across these brachiopods. Yet I am unsure of their name in spite of investigation on line. They are NOT uncommon so the ID should be easy but eludes me. So here I am asking for assistance! They are flat as a pancake if that helps. Link to comment Share on other sites More sharing options...
MeargleSchmeargl Posted May 4, 2018 Share Posted May 4, 2018 Interesting... Every single fossil you see is a miracle set in stone, and should be treated as such. Link to comment Share on other sites More sharing options...
Raggedy Man Posted May 4, 2018 Share Posted May 4, 2018 You get these at the gorge? Or a quarry? Formation? Im assuming these are devonian? ...I'm back. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 4, 2018 Share Posted May 4, 2018 Looks like a strophodontiid to me. Do you have this PDF? It might give some possible candidates. Sorry I cannot be more helpful. 2 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Raggedy Man Posted May 4, 2018 Share Posted May 4, 2018 Thanks @Fossildude19 The pdf I have is 46MB. Reason I asked for the formation so I can post the plates as they're different. The database is down atm from ISU that provides identification charts for the area he hunts. 1 ...I'm back. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 4, 2018 Share Posted May 4, 2018 @Raggedy Man Tags say Cedar Valley Formation, and Devonian. I know, I miss them all the time too. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Peat Burns Posted May 4, 2018 Share Posted May 4, 2018 I think this one is Pseudoatrypa or Atrypa. Not sure about the others. I'd have to "sit down" with them in hand. 1 Link to comment Share on other sites More sharing options...
minnbuckeye Posted May 4, 2018 Author Share Posted May 4, 2018 Thanks @Peat Burns. I thought this to be a possibility but none of the matrix had any domed concave material. Yet, I must have collected close to 20 flatter pieces. This is why I thought it impossible for an ID. Thanks @Fossildude19 for the pdf. Will take some time to read and digest it's content. @Raggedy Man, Is the dog hanging in there? Hopefully not suffering. Collected these from a pile of rip rap to prevent erosion. Link to comment Share on other sites More sharing options...
Peat Burns Posted May 4, 2018 Share Posted May 4, 2018 2 minutes ago, minnbuckeye said: Thanks @Peat Burns. I thought this to be a possibility but none of the matrix had any domed concave material. Yet, I must have collected close to 20 flatter pieces. This is why I thought it impossible for an ID. Thanks @Fossildude19 for the pdf. Will take some time to read and digest it's content. @Raggedy Man, Is the dog hanging in there? Hopefully not suffering. Collected these from a pile of rip rap to prevent erosion. It's definitely one of those two. I'll try to remember to look at the brachs I collected from the Coralville site you directed me to this summer and see if that sheds any light. I might have some with both valves. Link to comment Share on other sites More sharing options...
piranha Posted May 5, 2018 Share Posted May 5, 2018 These should be useful. The attached version of Day 1992 is keyword searchable. PM sent for Stainbrook 1938. Day, J. 1992 Middle-Upper Devonian (late Givetian-early Frasnian) brachiopod sequence in the Cedar Valley Group of central and eastern Iowa. Iowa Department of Natural Resources Guidebook Series 16:53-105 Stainbrook, M.A. 1938 Atrypa and Stropheodonta from the Cedar Valley beds of Iowa. Journal of Paleontology, 12(3):229-256 Link to comment Share on other sites More sharing options...
Peat Burns Posted May 5, 2018 Share Posted May 5, 2018 @minnbuckeye I just noticed some other goodies in your specimens. An inarticulate brachiopod, cf. Petrocrania (circled) and a microconchid, cf. Palaeoconchus (arrow) 3 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 5, 2018 Share Posted May 5, 2018 13 minutes ago, Peat Burns said: @minnbuckeye I just noticed some other goodies in your specimens. An inarticulate brachiopod, cf. Petrocrania (circled) and a microconchid, cf. Palaeoconchus (arrow) Good spot! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Al Dente Posted May 5, 2018 Share Posted May 5, 2018 Atrypa iowensis is a large Atrypa that is found in the area. Link to comment Share on other sites More sharing options...
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