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Monocraterion isp.Description: Monocraterion is a simple vertically oriented burrow that shows a funnel-like projection at the top of the burrow; erosion of the burrow top can make this trace fossil indentifiable as Skolithos. Monocraterion is interpreted as a combined dwelling and feeding burrow where the funnel probably served as a trap for prey organisms moving near the burrow opening; the probable tracemaker is a polychaete worm.
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