These pictures of a Hexagonaria anna (Whitfield, 1973) coral
fossil. It was found in the Bell Shale of the Traverse Group of Alpena,
Michigan, USA. The coral lived in the Devonian Period.
This fossil is really nice with Aulopora conferta? (Winchell) coral growing on what might be Hexagonaria.(Gürich, 1896). It was found in the Bell Shale of the Traverse Group at Carmeuse Quarry, Rogers City, Michigan, USA. The fossil dates to the middle Devonian Period (Givetian Stage).
