Abbreviated record for specimen 14257 Basic Information Determination: Alethopteris serli Brongniart Previously: none Type Status: Figured In: Janssen, 1939, p. 142, fig. 128Wagner, 1968, p. 146 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 110.5KB)large (600 dpi, 4.4MB) Catalog Data: show full record