Abbreviated record for specimen 14252 Basic Information Determination: Alethopteris serli Brongniart Previously: none Type Status: Figured In: Janssen, 1939, p. 142, fig. 127Wagner, 1968, p. 146 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 98.6KB)large (600 dpi, 3.6MB) Catalog Data: show full record