Earlier in the year, I posted an image of this Bumastus niagarensis (originally described in 1879 as Illaenus niagarensis ) when it was fou...

Pictures of two marble size cystoids (Rhombifera) of the Waldron Shale (Niagara Limestone) of Clark County, Indiana.  These cystoids are ca...

This brachiopod seems to match one shown on the Indiana State Museum collection database website that is identified as Cf. Alispirifer imb...