Pterinea brisa? Pelecypod Fossil

This image shows what appears to be a Pterinea brisa? pelecypod fossil. It was found in the Silurian age Waldron Shale layer of Clark County, Indiana, USA. It has not been prepped yet but has very distinctive lines  outlining its growth pattern during the creatures short life.

Identification is based off of images from illustrations from Plate 28 (Figures 7-9) Indiana Department of Geology and Natural History Eleventh Annual Report John Collett State Geologist 1881. First image is Plate 28 Figure 7 and the second is Plate 28 Figure 9. Species name by Hall and referred to in his publications of 1867, 1870, and 1879.

Glyptaster? Crinoid Calyx

Fossil shown appears to be some sort of species of Glyptocrinus or Glyptaster crinoid. Specimen was found in the Silurian Waldron Shale of Clark County, Indiana. Below are illustrations from Plate 13 (Figures 1-9) Indiana Department of Geology and Natural History Eleventh Annual Report John Collett State Geologist 1881.

UPDATE: Thanks to Nathan for pointing out this fossil has a new name. Thanks to Kenny for finding names it might be. The Indiana State Museum has a picture in their collections database of a crinoid called Dimeracrinites occidentalis (Glyptaster). It might be this or maybe a Melocrinus oblongus shown on this web site or the Dimerocrinites inornatus shown at this web page.

Top row on plates are identified as Glyptaster inornatus, Hall (1863,1879) and the second row is Glyptocrinus carleyi, Hall (1863,1879). I wrote about a similar specimen back in January 2011. See posting here.

Unidentified Crinoid Calyx Fossil

This crinoid calyx fossil is not identified. It was found in southern Indiana and is from the Mississippian Period. For reference, the Coca-Cola bottle cap is about 2 cm wide.