rickeclectic Posted July 19 Share Posted July 19 Found this echinoid last weekend in Denton County TX. I think it is in the Grayson formation (I am not the expert). Odd fellow, almost round but flattened on part. If you look carefully you can see the pattern on it (ambs? is that the right word?) Any help on identification greatly appreciated. 2 Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 19 Share Posted July 19 @JohnJ @Jared C @JamieLynn Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "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...
Jared C Posted July 19 Share Posted July 19 41 minutes ago, rickeclectic said: ambs? is that the right word? Yes, ambs is just slang for ambulacral plates, which are the tiny plates that constitute the pattern you’re seeing. The much larger plates between the ambulacral plates that make up the bulk of the body of the echinoid are the interambulacral plates. I don’t know this one off the top of my head and would need to refer to a field guide, but I’m on the move right now. @JohnJ would probably know 1 1 1 “Not only is the universe stranger than we think, it is stranger than we can think” -Werner Heisenberg Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted July 19 Share Posted July 19 Maybe Pseudananchys completa? 1 Link to comment Share on other sites More sharing options...
Mikrogeophagus Posted July 20 Share Posted July 20 Resembles Holaster, possibly Holaster simplex. Not sure if that occurs in the Grayson, but it does occur in nearby strata of the Washita Group. 1 1 Link to comment Share on other sites More sharing options...
JohnJ Posted July 20 Share Posted July 20 I agree this looks more like a Holaster sp.. 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
rickeclectic Posted July 22 Author Share Posted July 22 so it might be a Holaster sp. with part missing? It doesn't look heart shaped to me, but that may be because one side is crushed in or missing. 1 Link to comment Share on other sites More sharing options...
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