Dactylioceras cf. athleticum – 8 cm – very fine ribbing in inner whorls, outer whorls thicker, but still oval whorl section,
ribs very angled on venter
Dactylioceras cf. athleticum – 8 cm – very fine ribbing in inner whorls, outer whorls thicker, but still oval whorl section,
ribs very angled on venter
Yorkshire Ammonites (and other fossils ) revisited 