Abbreviated record for specimen 15407 Basic Information Determination: unidentified Previously: none Type Status: Figured In: Langford, 1958, p. 344, fig. 673 (bottom left) Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 41.9KB)large (600 dpi, image not available) Catalog Data: show full record