Abbreviated record for specimen 14259 Basic Information Determination: Alethopteris sullivanti Lesquereux Previously: none Type Status: Figured In: Janssen, 1939, p. 146, fig. 134Wagner, 1968, p. 152 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 148.3KB)large (600 dpi, 3.9MB) Catalog Data: show full record