"Special concern" on Canadian list of Species at Risk due to small range and habitat loss (Forsyth 2004).
Coniferous, deciduous, and mixed forest; under logs, vegetation, and leaf litter (Forsyth 2004).
In Washington, Hemphillia glandulosa is widespread but with a localized distribution in the Puget Sound Region, including Puget Sound lowlands, southern Olympic Peninsula, and Cascade and Coast Ranges. In Oregon it is known south to the west-central area of the state. Populations are not known from east of the Cascade Range. In Canada, H. glandulosa is known from14 localities on Vancouver Island from south of Namaimo to the southern part of the island. It is not known from the Canadian mainland (COSEWIC 2003).
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Probably an annual species.
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External: Broad-bodied; light brown body; without dark spots, or dark spots less distinct, where body grooves meet the pedal groove above edge of sole; blue-gray head and tentacles; mantle at least half body length; papillate mantle with streaks and dark spots; strong dorsal keel; body grooves may or may not be pigmented; sides of foot light without markings, or with dark transverse lines; large caudal horn.
Distinct from other Hemphillia: wide body, large mantle with dense papillae (Forsyth 2004).
Eggs: Oval, may be up to 3 mm diameter; eggs are generally laid singly or in pairs in leaf litter, on or within woody debris, and moss mats; eggs have also been found up to 1 meter above-ground on moss-covered trunks of red alder, most commonly found on or under logs or other woody debris.
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Body 12 to 20 mm, up to 30 mm long.
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