Abbreviated record for specimen 15043 Basic Information Determination: Alethopteris serli Brongniart Previously: none Type Status: Figured In: Langford, 1958, p. 241, fig. 436Wagner, 1968, p. 146 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, image not available)large (600 dpi, image not available) Catalog Data: show full record