A Field Guide to the Snails of Lord Howe Island

88 Family Helicarionidae (Glass snails and semislugs) Gudeconcha sophiae sophiae (Reeve, 1854) Lord Howe Island Glass Snail Shell. Size: H =14.4-18.9 mm, D = 24.4-32.2 mm. Colour: Yellow-brown, not glossy. Shape: Depressedly turbinate with a moderately raised conical spire, whorl profile rounded above and below a slightly angulate periphery. Sculpture: Protoconch smooth; teleoconch sculptured with microscopic spiral grooves and strong radial growth lines. Aperture: Ovately lunate. Umbilicus: Closed by reflection of columella. Animal. Yellow-brown with an orange sole and brown spots on the sides of the foot. Three colour bands on neck: brown bands leading to eyestalks and central orange-brown band. Caudal horn small. Shell lappets narrow, short to very short, shell lobes moderately small. Key distinguishing features. Large size, depressedly turbinate. Differs from G. sophiae magnifica by its slightly smaller, higher spired shell and paler body colour. Habitat and occurrence. This species is most abundant in the North Bay region and the settlement region, but is also known from Intermediate Hill, the golf course, Smoking Tree Ridge and the lower slopes of Mt Gower and Gudeoconcha sophiae sophiae