| Isorophusella incondita Edrioasteroids Bobcaygeon Formation Brechin, Ontario, Canada Plates with multiple specimens are not unusual. Plates with several hundred specimens have been found. Size: 2 cm diameter for the largest edrio. | 
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| Isorophusella incondita Edrioasteroids Bobcaygeon Formation Brechin, Ontario, Canada Plates with multiple specimens are not unusual. Plates with several hundred specimens have been found. Size: 2 cm diameter for the largest edrio. |
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