Abbreviated record for specimen 15722 Basic Information Determination: Mariopteris anthrapolis Langford Previously: none Type Status: type Figured In: Darrah, 1969, p. 123Langford, 1958, p. 268-269, fig. 489 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 78KB)large (600 dpi, image not available) Catalog Data: show full record