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

Ancotrema sportella (Gould, 1846)
Beaded Lancetooth
Family: Haplotrematidae
Species account author: Robert Forsyth.
Photo of species

© Kristiina Ovaska  Email the photographer   (Photo ID #2498)

E-Fauna BC Static Map
Distribution of Ancotrema sportella in British Columbia
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Species Information

Among species of haplotrematids in BC, this is often the smallest species. It is most similar to Ancotrema hybridum but has the beaded colabral riblets continuing to the final part of the last whorl.


Small to medium-sized, disc-shaped; straw yellow to greenish-yellow; axial riblets beaded throughout by intersecting spiral lines; aperture lip with 'drooping' edge.


Body long, slender; cream-coloured, with dorsum, head and tentacles darker. Mantle with fine, pale brown speckling.


Predominantly deciduous and mixedwood forests; living in deep leaf litter and under logs, other dead wood and rocks. It is sympatric with Ancotrema hybridum in some areas in southwest BC.


Global range

BC to Del Norte, Siskiyou, and Humboldt counties, California (Roth and Sadeghian 2006); east through northern Washington and Idaho (Frest and Johannes 2001).

BC range

Southern and eastern Vancouver Island, the Sunshine Coast, and the Fraser Valley. There is some confusion with Ancotrema hybridum so the full extent of the range in BC is uncertain. It may be expected in southern areas of the Interior Wet Belt.


Pacific Maritime.



Genus name derived from the Greek words, "ankon" (a bend or valley) and "trema" (aperture or hole); the gender is neuter. Species epithet, Latin, "little basket".

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
NativeS4S5YellowNot Listed
BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

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: 2024-07-20 2:03:44 PM]
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© E-Fauna BC 2021: An initiative of the Spatial Data Lab, Department of Geography, UBC