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Showing results for tags 'heart urchins'.
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Pliotoxaster comanchei (Clark) & Heteraster (Enallaster) obliquatus (Clark)
erose posted a gallery image in Member Collections
From the album: Texas Echinoids, ERose
Comparative photo of the two Glen Rose heart urchins. These are from the "Salenia texana" marker bed at the top of Unit 2, Lower Member, Glen Rose Formation, Trinity Group (Albian) of Comal County, Texas. Note all five ambulacra are depressed in Pliotoxaster versus only the anterior ambulacra in Heteraster-
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- echinoid
- heart urchins
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(and 1 more)
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From the album: Grayson Co. Texas finds
Various urchins that I have found. Grayson co. Texas found in a creek that runs right through the middle of town in Denison, Grayson co. Tx. I think that this creek is in the Pawpaw formation, but could be Main Street or Duck Creek?-
- duck creek
- echinoids
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(and 3 more)
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From the album: Grayson Co. Texas finds
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From the album: Grayson Co. Texas finds
Heart urchin group on ammonite cast. Overall size 11" long. I think this creek is in the Pawpaw formation, but could be Duck Creek?