Abbreviated record for specimen 15257

Basic Information Determination: Hymenophyllites thallyformis Lesquereux Previously: none  Type Status:   Figured In: Darrah, 1969, p. 165-166 Langford, 1963, p. 273, fig. 919a Pfefferkorn, 1973, p. 146-148, pl. XXVI, fig. 5  Locality: Will County, Illinois Geologic Unit: Francis Creek Shale   Additional Information Images: medium (150 dpi, 92KB) large (600 dpi, image not available) Catalog Data: show full record