Amphilichas sp. cephalon. This is pretty small - .7 cm across. Platteville Formation Twin Cities Minnesota. Rare. Its cephalon is very distinct, having 5 well definite lobes.
Photo Information
- Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA
- Focal Length 10.7 mm
- Exposure Time 1/25
- f Aperture f/3.2
- ISO Speed 140
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