Family Gastrodontidae

Zonitoides arboreus (Say, 1816): Quick Gloss

  Records. - Map 15. RBCM: 998-00031-005; 003-00125-001; 003-00126-002; 003-00127-001; 003-00133-001; 003-00150-002; 003-00152-001; 003-00154-002; 003-00155-002; 003-00156-005; 003-00163-002; 003-00167-005; 004-00124-003; 004-00128-007; 004-00130-008. RGF: 98-053-3312; 98-054-3303; 98-056-3314; 98-058-3416; 98-059-3043; 98-062-4348; 98-063-3273; 98-064-3347; 98-065-4176; 98-066-4352; 98-067-3334; 98-068-3420; 98-072-4356; 98-077-3340; 98-081-3716; 98-084-3720; 98-086-3287. CMN: 083091; 083093; 083117.

Zonitoides arboreus was frequently encountered in the Peace River - northern Rockies region, where it was found in a variety of dry to rather wet habitats, including pure stands of spruce or pine, mixedwood forests, and disturbed sites between elevations of 420-1130 m. It is one of the most widespread and common land snails in northern British Columbia.

Family Daudebardiidae

Nesovitrea binneyana (Morse, 1864): Blue Glass

  Records. - Map 16. RBCM: 003-00126-001; 003-00128-001; 003-00129-003; 003-00130-003; 003-00132-002; 003-00133-002; 003-00153-002; 003-00154-004; 003-00157-003; 004-00132-004. RGF: 98-055-3310; 98-058-3438; 98-064-3346; 98-065-4178; 98-067-3333. CMN: 083106; 083119.

In the Peace River - northern Rockies region, this species was found living under logs, fallen branches and lumber, and in leaf litter, in mixedwood forests (and disturbed areas adjacent) between 490-880 m a.s.l. Nesovitrea binneyana is widespread across British Columbia and more frequently found than the next species.

Nesovitrea electrina (Gould, 1841): Amber Glass

  Records. - Map 17. RGF: 98-077-3342; 98-072-4355. CMN: 014226; 083108.

In the Peace River - northern Rockies region I found Nesovitrea electrina under logs, roots and sticks in a burnt forest, with young, regenerative pine (1130 m a.s.l.) and along grassy roadside, under lumber (460 m a.s.l.). As noticed elsewhere in British Columbia, N. electrina, although widespread is less common than N. binneyana.

Family Vitrinidae

Vitrina pellucida (Müller, 1774): Western Glass-snail

  Records. - Map 18. RBCM: 003-00148-001; 003-00158-001; 003-00161-002; 003-00162-002; 003-00166-002; 003-00167-003; 004-00129-005; 004-00130-007. RGF: 98-065-4177; 98-066-4349; 98-071-3460; 98-075-4337; 98-084-3719; 98-086-3289. CMN: 083107; 083116.

Vitrina pellucida is a widespread species in British Columbia, occurring throughout the province from sea level to the alpine. In the Peace River - northern Rockies region these snails were found at elevations between 420 m and 1722 m, where they live under rocks, dead wood and in leaf litter in both open and lightly wooded habitats that are often seasonally dry. The highest elevation for this species in the Peace River - northern Rockies region, is also the highest currently known site in B.C. There, this species was found, along with Euconulus fulvus, under limestone rocks on a vegetated slope around the shore of a small lake. A live animal, from along the Liard River, near Cranberry Rapids (RBCM 004-00130-007) is illustrated in Figure 11.

Figure 11 Live animal of Vitrina pellucida, Liard River, near Cranberry Rapids (RBCM 004-00130-007).

Family Agriolimacidae

Deroceras laeve (Müller, 1774): Meadow Slug

  Records. - Map 19. RBCM: 003-00156-001; 004-00129-001; 004-00128-001. CMN: 083095; 083125.

This is one of the most widespread species of slugs in British Columbia; in southern and central areas of the province it is usually almost always associated with wetland habitats. In the Peace River - northern Rockies region Deroceras laeve has been collected in the around under logs on a calcareous mud flat of a small unnamed pond west of Ed Bird Lake in the Finlay River valley (RBCM 003-00156-001), and in spruce and mixedwood forests such as those on the Liard Plain (other collections listed above, but also further west, outside the region). This species and Prophysaon andersonii are the only native slugs in the Peace River - northern Rockies region.

Deroceras reticulatum (Müller, 1774): Grey Fieldslug

  Records. - Map 20. RBCM: 003-00160-001.

This European slug is widely introduced into British Columbia, although records of it are fewer in the north. In the Peace River - northern Rockies region Deroceras reticulatum was found along the shoreline of a lake near Mackenzie (Figure 12).

Figure 12 Live animal of Deroceras reticulatum, Morphee Lakes, near Mackenzie (RBCM 003-00160-001).

Family Thysanophoridae

Microphysula ingersollii (Bland, 1875): Spruce Snail

  Records. - Map 21. RBCM: 003-00162-001.

This species is known from the Peace River - northern Rockies region by a single collection made above Pine Pass (Hart Ranges), in the Rocky Mountains. At this site (1160 m a.s.l.), these snails were found living under rocks, in moist, vegetated gully/avalanche track, with Vitrina pellucida. This is currently the most northern known occurrence of this species.

Family Arionidae

Prophysaon andersonii (Cooper, 1872): Reticulate Taildropper

  Records. - Map 22. RBCM: 003-00161-001.

This species probably only occurs in the southern areas of the Peace River - northern Rockies region within the Sub-Boreal Spruce and perhaps the Engelmann Spruce - Subalpine Fir zones, since although widespread in the Central Interior, it apparently is absent from a large part of northern British Columbia. In the Peace River - northern Rockies region Prophysaon andersonii was found at one site near Mackenzie (740 m a.s.l.), amid forbs and shrubs under a power line adjacent to a mixedwood forest. This species and Deroceras laeve are the only native slugs in the Peace River - northern Rockies region.

Terrestrial Gastropods ...   
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