E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Hemphillia glandulosa Bland & W.G. Binney, 1872
Warty Jumping Slug
Family: Arionidae
Species account author: Robert Forsyth.

Photo of species

© Kristiina Ovaska  Email the photographer   (Photo ID #2508)

E-Fauna BC Static Map
Distribution of Hemphillia glandulosa in British Columbia
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Species Information


Among species of Hemphillia in BC, H. glandulosa is recognized by its smaller size, densely papillate dorsal hump, and fleshy horn-like protuberance at the end of the tail.


A small slug, brown with bluish-grey head and tentacles; dorsal hump/mantle with darker streaks and spots, covered with numerous, close-packed papillae; dorsal keep highly arched and laterally compressed; end of tail with a fleshy "horn".

Shell Mostly internal (small area exposed dorsally); plate-like, thin.




NW North America



Genus named for Californian Henry Hemphill (1830-1914), a mason by profession, but an important early West Coast malacologist. The gender is feminine. Pronunciation should be "hemp-hill-ee-a", not "hem-fill-ee-a". Species epithet, Latin, "a dromedary", like "camelus", a reference to the hump on the back.

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
NativeS2?RedSC (Apr 2013)
BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

Additional Notes

This species was assessed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) as 'special concern' in 2003. The status report describes the species as follows: '[It] is asmall species with length of adults usually about 20 mm. There is a prominent dorsal hump (containing the viscera) that is covered by the mantle, and a flattened shell that is visible through a slit in the mantle. The body is depressed below the dorsal hump, and raised into a high dorsal keel on the tail; the end of the tail has a caudal mucus pore, which is overhung by a fleshy protuberance, often called the caudal “horn.” It is a species of moist forested and riparian habitats that is found at varying elevations, and is most prevalent in stands older than 35 years (COSEWIC 2003). It is a hermaphroditic, egg-laying species (COSEWIC 2003).


COSEWIC. 2003. COSEWIC Assessment and Status Report on theWarty Jumping-slug Hemphillia glandulosa in Canada. Committee on the Status of Endangered Wildlife in Canada, Ottawa.

Additional Range and Status Information Links

Additional Photo Sources

General References

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2021. E-Fauna BC: Electronic Atlas of the Fauna of British Columbia [efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2024-05-24 5:32:11 AM]
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