Hawaiian Ecosystems at Risk project (HEAR)

Deroceras laeve

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Deroceras laeve is native to the Holarctic. 

Taxonomy & nomenclature

Deroceras laeve information from ITIS
The Integrated Taxonomic Information System ITIS provides authoritative taxonomic information on Deroceras laeve, as well as other plants, animals, fungi, and microbes of North America and the world.

Human health issues

Distribution of Parmarion cf. martensi (Pulmonata: Helicarionidae), a new semi-slug pest on Hawaii Island, and its potential as a vector for human angiostrongyliasis View info about Adobe Acrobat PDF format
The semi-slug Parmarion cf. martensi Simroth, 1893, was first discovered on Oahu, Hawaii, in 1996 and then on the island of Hawaii in 2004. This species, which is probably native to Southeast Asia, is abundant in eastern Hawaii Island, reportedly displacing the Cuban slug, Veronicella cubensis (Pfeiffer, 1840), in some areas. A survey in July-August 2005 found P. cf. martensi primarily in the lower Puna area of Hawaii Island, with an isolated population in Kailua-Kona (western Hawaii Island). It is now established in commercial papaya plantations, and survey participants reported it as a pest of lettuce and papaya in home gardens. Survey respondents considered P. cf. martensi a pest also because of its tendency to climb on structures where it deposits its feces and because of its potential to transmit disease. Individuals of this species were found to carry large numbers of infective third-stage larvae of the nematode Angiostrongylus cantonensis (Chen, 1935), the causative agent of human angiostrongyliasis and the most common cause of human eosinophilic meningoencephalitis. Using a newly developed polymerase chain reaction test, 77.5% of P. cf. martensi collected at survey sites were found infected with A. cantonensis, compared with 24.3% of V. cubensis sampled from the same areas. The transmission potential of this species may be higher than that for other slugs and snails in Hawaii because of the high prevalence of infection, worm burdens, and its greater association with human habitations, increasing the possibility of human-mollusk interactions.


Invasive species in the Pacific: A technical review and draft regional strategy (2000) View info about Adobe Acrobat PDF format
The status of invasive plants, vertebrates, arthropods, molluscs, and crustaceans, and options for a regional invasive species strategy for the South Pacific are presented in this series of articles from the South Pacific Regional Environment Programme, 2000.

Full-text articles

Invasive species in the Pacific: A technical review and draft regional strategy
South Pacific Regional Environmental Programme (SPREP). Sherley, Greg (ed.) . 2000. Invasive species in the Pacific: A technical review and draft regional strategy. Apia, Samoa: South Pacific Regional Environment Programme. ISBN: 982-04-0214-X.

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