Monica Posted January 2, 2020 Share Posted January 2, 2020 Hi again! This past summer I purchased a small rock with 4 edrioasteroids on it, and I was hoping to get your help in identifying them. The seller said that the rock is from the Upper Ordovician Verulam Formation in Gamebridge, Ontario, and he/she said that the following 3 species of edrioasteroid are on the rock: Cryptogoleus chapmani Isorophusella incondita Belochthus orthokolus Can anyone tell me the specific identity of each edrioasteroid? Thanks so much for your help! Monica Photo of the whole rock: The two edrioasteroids on the right side of the rock - one is quite big (we'll call it Specimen #1) and the other is quite small (we'll call is Specimen #2): The edrioasteroid in the middle of the rock (we'll call it Specimen #3): The edrioasteroid on the left side of the rock (we'll call is Specimen #4): 4 Link to comment Share on other sites More sharing options...
grandpa Posted January 2, 2020 Share Posted January 2, 2020 For Cryptogoleus chapmani Isorophusella incondita See: See also: https://www.nrcresearchpress.com/doi/abs/10.1139/e80-064#.Xg42zPx7nIU For Belochthus orthokolus see: I invite you to make the decision for each edrio's ID, based on these photos compared to your finds. [As my physics and math profs always used to say, "The solution to the problem from here is pedestrian. I leave it to the student to complete the exercise from here and turn in your work." meaning, "I haven't a clue how to proceed from here; maybe you can figure it out, turn your work in, and show me how it is done."] 3 Link to comment Share on other sites More sharing options...
Northern Sharks Posted January 2, 2020 Share Posted January 2, 2020 1 hour ago, Monica said: Hi again! This past summer I purchased a small rock with 4 edrioasteroids on it, and I was hoping to get your help in identifying them. The seller said that the rock is from the Upper Ordovician Verulam Formation in Gamebridge, Ontario, and he/she said that the following 3 species of edrioasteroid are on the rock: Cryptogoleus chapmani Isorophusella incondita Belochthus orthokolus Can anyone tell me the specific identity of each edrioasteroid? Thanks so much for your help! Monica Photo of the whole rock: The two edrioasteroids on the right side of the rock - one is quite big (we'll call it Specimen #1) and the other is quite small (we'll call is Specimen #2): The edrioasteroid in the middle of the rock (we'll call it Specimen #3): The edrioasteroid on the left side of the rock (we'll call is Specimen #4): Hi Monica: On your slab, specimens 1 & 3 "may" be Belochthus, or they may be something else we don't know about yet. Specimen 2 is Cryptogoleus and specimen 4 is Isorophusella. The outer plates around the rim seem to be the easy way to tell them apart. There are likely other small edrio species in the Verulam, but when they are small, they are VERY tough to identify, and they may or may not even be described. This looks like a piece from Mr. Crinus, so maybe he'll weigh in on this as well. 3 There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
crinus Posted January 3, 2020 Share Posted January 3, 2020 Hi Monica, I am pretty sure you got that from me. It looks familiar. Left is Isorophusella. Two in the middle are Belochthus and the far right is Cryptogoleus. Hope that helps. Joe 1 Link to comment Share on other sites More sharing options...
Monica Posted January 3, 2020 Author Share Posted January 3, 2020 11 minutes ago, crinus said: Hi Monica, I am pretty sure you got that from me. It looks familiar. Left is Isorophusella. Two in the middle are Belochthus and the far right is Cryptogoleus. Hope that helps. Joe It most definitely helps - thanks! And thanks to you, too, @Northern Sharks! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now