Orange Fossil Ammonite Display. Middle Jurassic Period, Aalenian stage, 174.1-170.3 million years B.P. A large freestanding display containing polished specimens: a belemnite, scallops and Lytoceras dilucidum, Leioceras and other ammonites in various sizes, the largest 32 cm in diameter. 41.9 kg, 60 cm (23 5/8 in.). [No Reserve] with Science & Natural History, South Kensington, 27 April 2017, no.13.