Photo 1. Side view of the yellow-shelled semi-slug, Parmarion martensi, showing the shell partly covered by the mantle. Contrast the grey colour with Photo 2.
Photo 2. A yellow-shelled semi-slug, Parmarion martensi, brown, and showing the shell partly covered by the mantle, the cream ridge (keel) along the tail, and black antennae.
Photo 3. A yellow-shelled semi-slug, Parmarion martensi, showing little of the shell, but the cream ridge (keel) along the tail is clear.
Photo 4. A yellow-shelled semi-slug, Parmarion martensi, with dark body colour, and shell well-covered by mantle (similar to Photo 5).
Yellow-shelled semi-slug. A semi-slug does not have a shell that it can retract into.
AUTHOR Grahame Jackson
1Information from Brodie G, Barker GM (2011) Introduced land snails in the Fiji Islands: are there risks involved? In: Veitch CR, Clout MN, Towns DR (eds.) 2011. pp32-36. Island Invasives: Eradication and Management. IUCN, (International Union for Conservation of Nature), Gland, Switzerland; and Helicarionidae. Terrestrial Mollusc Tool. USDA, UF, Lucid. (http://idtools.org/id/mollusc/factsheet.php?name=Helicarionidae); and Cowie RH, Hayes KA, Kim Jr, Bustamente KM, Yeung NW (2018) Parmarion martensi Simroth, 1893 (Gastropoda: Ariophantidae), an intermediate host of Angiostrongylus cantonensis (rat lungworm), on Maui. Records of the Hawaii Biological Survey for 2017. Edited Neal L. Evenhuis. Bishop Museum Occasional Papers 123: 7–10 (2018); and from Brodie G, Barker GM (2012) Parmarion martensi Simroth, 1893. Family Ariophantidae. USP Introduced Land Snails of the Fiji Islands Fact Sheet Series, No. 1. Photos 1&2 Parmarion martensi (DSC00332 & DSC07854. (www.NatureLoveYou.sg.). Diagram Billion. Wikipedia. (https://en.wikipedia.org/wiki/Slug).
Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/185: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Secretariat of the Pacific Community.
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