Shirbuirnia trigonalis (Buckman 1925)
By Ludwigia
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17cm. Trigonalis subzone, laeviuscula zone, lower Bajocian, Middle Jurassic. From Sherborne, Dorset, UK.
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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