MSirmon Posted March 1, 2016 Share Posted March 1, 2016 I found this rock in Benbrook Texas and suspect it is a hidden Trilobite. I believe the area is lower Cretaceous. Am I on the right track? Am showing too and bottom views to show why I think trilobite. Link to comment Share on other sites More sharing options...
fossilized6s Posted March 1, 2016 Share Posted March 1, 2016 Not a trilobite. Maybe oyster bit....? ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG Link to comment Share on other sites More sharing options...
jhw Posted March 1, 2016 Share Posted March 1, 2016 I'd suspect mollusks of some sort too. Might want to prep a little, see what turns up. Link to comment Share on other sites More sharing options...
howard_l Posted March 1, 2016 Share Posted March 1, 2016 Trilobites were done after the Permian Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
MSirmon Posted March 1, 2016 Author Share Posted March 1, 2016 Howard that's what confuses me. Trilobites are found in the area but every map I see says this area is upper Cretaceous transitioning to lower Cretaceous. Any ideas on the best way to prep it for a better shot at identification. Here are some shots of the other items found in the area. Link to comment Share on other sites More sharing options...
Oxytropidoceras Posted March 1, 2016 Share Posted March 1, 2016 (edited) I would suspect that it is a Gryphaea sp. (Devil's toenails). Go see https://en.wikipedia.org/wiki/Gryphaea and The Lower Cretaceous Gryphaeas of the Texas Region by Robert Thomas Hill and Thomas Wayland Vaughan at either https://pubs.er.usgs.gov/publication/b151 , http://pubs.usgs.gov/bul/0151/report.pdf , or https://repositories.tdl.org/ttu-ir/handle/2346/64830 . The last URL has a link to the best PDF version. Edited March 1, 2016 by Oxytropidoceras 1 Link to comment Share on other sites More sharing options...
Nenando Posted March 1, 2016 Share Posted March 1, 2016 I agree with oxyt. I find a lot up in denton Link to comment Share on other sites More sharing options...
bone2stone Posted March 1, 2016 Share Posted March 1, 2016 Oxy is on the money. Gryphaea quite plentiful ~4 species around the Ft. Worth area. Your implication that trilobites are found in the area is way off. The nearest trilobite material would be Jacksboro or Mineral Wells ..... Never found trilobite in Hood Co. but the Strawn formation in Hood Co. is old enough. I live and hunt in the DFW area. You could get out with me some time and I'll show you some of the ropes. Been hunting the inner area and the 100+mile area around here for over 50 years. PM me if you want to get out some Sunday. Jess B. 2 Link to comment Share on other sites More sharing options...
MSirmon Posted March 1, 2016 Author Share Posted March 1, 2016 Thanks for the great information guys. It looks like I did mispeak on trilobites in thebFf Worth area and apologize for that. I went back to the web data I been reading and the Google search had shifted to Mineral Wells without me realizing it. I'll PM you Jess. Link to comment Share on other sites More sharing options...
FossilDAWG Posted March 1, 2016 Share Posted March 1, 2016 I think many (maybe all) the "Gryphaea" species in Vaughn's publication have been reassigned to related genera, especially Texigryphaea. Texigryphaea roemeri seems like a reasonable match to your specimen, as far as it can be seen. Don 1 Link to comment Share on other sites More sharing options...
Guguita2104 Posted March 2, 2016 Share Posted March 2, 2016 Gryphaeidae bivalve as the others said. Link to comment Share on other sites More sharing options...
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