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

Heliophyllum sp. horn coral found in the Beechwood Member of the North Vernon Limestone of Clark County, Indiana.  This coral existed in t...

These Middle Silurian Period (428-423 mya) horn corals are from the Louisville Limestone of Jefferson County, Kentucky.  They appear to be ...