Pentremites conoidcus Blastoid Piece

This might be a segment of the ambulacral area of a Pentremites conoidcus blastoid has been magnified under a microscope. It is in a area about 4 mm wide. The fossil was found in the Salem Limestone of Spergen Hill Indiana. This area is known for its Mississippian Period fossils.
The identification appears to match Figure 32 found on Plate XXVI in the Indiana Department of Geology and Natural Resources Thirtieth Annual Report, W.S. Blatchely State Geologist, 1905.
Thanks to Kenny for the fossil image.

Pages 1436-1437 Plate XXVI Figure 32

Dichocrinus striatus Crinoid Plate

This Mississippian Period fossil appears to be a Dichocrinus striatus crinoid calyx plate. Fossil in image about 4 mm wide. It was found at Spergen Hill, Indiana at a famous Salem Limestone microfossil locality. The identification matches Figure 5b found on Plate XIII in the Indiana Department of Geology and Natural Resources Thirtieth Annual Report, W.S. Blatchely State Geologist, 1905.
Thanks to Kenny for sharing this fossil image.

Plate XIII Figure 5b

Plate XIII Figures 5 and 5a

Unknown Mississippian Shark Fossil

Unidentified shark fossil found in the Indian Springs or Haney Formation of Crawford County, Indiana, USA. This creature swam around in the Upper Mississippian seas. It might be a Psammodus or Helodus tooth fragment. Still researching.