Photo Information
- Taken with Apple iPhone 7
- Focal Length 4 mm
- Exposure Time 1/30
- f Aperture f/1.8
- ISO Speed 32
By erose
Smith and Rader (2009) mention the occurrence Pygaster based on incomplete material. This specimen is from the echinoid marker bed of Unit 2, Lower Member, Glen Rose Formation, Trinity Group (Albian) Comal County, Texas.
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