A Field Guide to the Snails of Lord Howe Island

152 Introduced species - snails with elongate shells Family Subulindae The Subulinidae are native to the Tropics, and comprise small snails with slender, elongate shells. The body is usually yellow or yellow-orange. Subulinids are oviparous, and in most adults, several large, white eggs can often be observed through the last whorl of the shell. A single endemic genus is found in Australia, as well as several introduced species. Allopeas clavulinum (Potiez & Michaud, 1838) Spiked Awlsnail Shell. Size: H = 5-6.4 mm, D = 2-2.5 mm. Colour: Colourless to yellow- gold, glossy, transparent; pearly in dead shells. Shape: Elongate conical; whorls rounded; sutures impressed. Sculpture: Smooth and glossy. Aperture: Teardrop-shaped; lip simple. Columella: Straight, simple. Umbilicus: Closed. Animal. Body yellow, eyes not swollen at tips. Key distinguishing features. Small, narrow, very elongate shell; yellow body. Habitat and occurrence. First recorded on Lord Howe Island in 1976. Widespread in the Settlement and Intermediate Hill areas. Also found in some parts of the Mt Lidgbird slopes. Remarks. This species has a similar shell to members of the genus Tornatellinopss (Achatinellidae), but can distinguished by its larger size. Image D. Beechey. 2 mm