Tag Archives: introduced species

Aegopinella nitidula

Aegopinella nitidula; Queen Elizabeth Park, Vancouver, BC (diameter: 7.2 mm).

Aegopinella nitidula (Draparnaud, 1805) is yet another terrestrial land snail introduced into Canada. This species, which bears some resemblance to the also introduced species of Oxychilus, was first noticed in BC (and North America) by myself and friends around the Vancouver area. Since then, I am unaware of any finds outside of this regions. It would be of interest to learn of additional occurrences anywhere in the region, or beyond. Oddly, no one has yet to find it elsewhere in Canada or the USA.

Further reading:

Forsyth RG, Hutchinson JMC, Reise H (2001) Aegopinella nitidula (Draparnaud, 1805) (Gastropoda: Zonitidae) in British Columbia—first confirmed North American record. American Malacological Bulletin 16: 65–69. PDF here.

Ambigolimax valentianus

Ambigolimax valentianus at Qualicum Bay, Vancouver Island, BC; 9 July 2020.

Ambigolimax valentianus (A. Férussac, 1821), also known as Lehmannia valentiana and Limax valentiana, is a widely introduced terrestrial slug that presumably is native to the Iberian Peninsula. In 1999 I first found this species on Pender Island and in the Victoria region, and published a short note on it. I found it abundant in my own Victoria backyard, in my compost bin, and even in January 2000, slugs were active in my compost, which I suppose offered ample shelter, food, and perhaps a bit of warmth.

Since then, it has turned up in the Vancouver area, and I suppose that it will be found elsewhere if suitable habitats are checked. My last observation of A. valentianus was at a beach access at Qualicum Bay (Lat: 49.4075, Lon: -124.6342). There slugs were found under a piece of wood on sandy, weedy ground along the road access.

The record was reported in iNaturalist: https://www.inaturalist.org/observations/52472053

Presently this is the most northern occurrence that I know of in BC (although additional occurrences farther up the island are very likely, and iNaturalist even has observations from Alaska).

A recent useful publication on A. valentianus has recently been published (

Vendetti JE, Burnett E, Carlton L, Curran AT, Lee C, Matsumoto R, Mc Donnell R, Reich I, Willadsen O (2019) The introduced terrestrial slugs Ambigolimax nyctelius (Bourguignat, 1861) and Ambigolimax valentianus (Férussac, 1821) (Gastropoda: Limacidae) in California, with a discussion of taxonomy, systematics, and discovery by citizen science. Journal of Natural History 53: 1607-1632. https://doi.org/10.1080/00222933.2018.1536230