Dactylioceras commune (Sowerby)
Fine complete macroconch. The very inner whorls are covered by the lower valve of an oyster which has grown on the hard substrate that the dead Ammonite would have provided on the sea floor. Nice sutures. Unusual.
Jurassic, Upper Toarcian, Commune Zone., 'Junction Beds'.
Hurcott district near Ilminster, Somerset.
Ammonite : 6.5 cm. diam.
