![Aulacostephanus pseudomutabilis](http://www.geoed.co.uk/cdn/shop/products/pictrilonew_a6cb2e4f-8768-4d86-b434-98d787824b97_{width}x.png?v=1580743595)
A fine adult internal mould showing the characteristic ribbing of strong primaries and long secondaries. the ventral smooth band shows well and about 3/4 whorl of body chamber is present showing uncoiling of the umbilical seam.
Size: 78mm diameter
Size: 78mm diameter