Shirbuirnia trigonalis (Bayle 1878)
By Ludwigia
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9cm. From the trigonalis subzone, of which it is the index fossil, laeviuscula zone, lower Bajocian. Found at Sherborne Dorset, GB.
Photo Information
- Taken with Canon Canon PowerShot SX230 HS
- Focal Length 5 mm
- Exposure Time 1/30
- f Aperture f/3.1
- ISO Speed 160
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