Abbreviated record for specimen 15818

	Basic Information Determination: Sigillaria mammillaris Brongniart Previously: none  Type Status:   Figured In: Langford, 1958, p. 114, fig. 208  Locality: Will County, Illinois Geologic Unit: Francis Creek Shale   Additional Information Images: medium (150 dpi, 37.3KB) large (600 dpi, image not available) Catalog Data: show full record