Tag Archives: checklist

Smithers’ first bioblitz

Two terrestrial molluscs added to the Glacier Gulch list

Recently, July 30 and 31, 2011, the first ever Smithers’ bioblitz was held at Glacier Gulch on Hudson Bay Mountain. I participated, looked for snails and took photographs. Turn out was excellent although the weather was inclement, as it has been for much of the summer.

Five species of land snails were known from Glacier Gulch: Euconulus fulvus, Vertigo modesta (photographed), Discus whitneyi, Punctum randolphii, and Columella edentula. One additional species of snail, Vespericola columbianus (below), and an introduced Arion slug were found by bioblitzers, bringing the total to seven species. Vespericola columbianus has been found before on Hudson Bay Mountain, and more unusually, in the valley.

Vertigo modesta

Vertigo modesta.

Vespericola columbiana

Vespericola columbiana.


Bulkley Valley Mollusca

A checklist of species

Over a decade ago, I published a paper on the snails of this area (Forsyth 2001), comparing what I found in the valley to the (rather wetter) mountain slopes. The results are pretty much unchanged, though I have since made many additional collections and observations from more sites. Here is the updated list that for completeness also includes the freshwater (aquatic) molluscs known to me (the Bivalvia and the gastropod families Lymnaeidae, Physidae, and Planorbidae).


Family Unionidae [aquatic]

  • Anodonta kennerleyi – Western Floater

 Family Sphaeriidae [aquatic]

  • Musculium securis – Pond Fingernailclam
  • Pisidium spp. – Peaclams

Family Lymnaeidae [aquatic]

  • Galba galbana – Boreal Fossaria
  • Galba modicella – Rock Fossaria
  • Lymnaea stagnalis – Swamp Lymnaea
  • Stagnicola catascopium – Woodland Pondsnail
  • Stagnicola elodes – Marsh Pondsnail

 Family Physidae [aquatic]

  • Physella gyrina – Tadpole Physa

 Family Planorbidae [aquatic]

  • Gyraulus circumstriatus – Disc Gyro
  • Gyraulus deflectus – Flexed Gyro
  • Gyraulus parvus – Ash Gyro
  • Helisoma anceps – Two-ridge Rams-horn
  • Planorbella trivolvis – Marsh Rams-horn
  • Promenetus exacuous – Umbilicate Sprite
  • Ferrissia fragilis – Fragile Ancylid

 Family Succineidae

  • Oxyloma sp. – Ambersnail

 Family Cochlicopidae

  • Cochlicopa lubrica – Glossy Pillar

 Family Valloniidae

  • Vallonia excentrica – Iroquois Vallonia
  • Vallonia gracilicosta – Multirib Vallonia
  • Vallonia pulchella – Lovely Vallonia
  • Zoogenetes harpa – Boreal Top

Family Vertiginidae

  • Columella columella – Mellow Column
  • Columella edentula – Toothless Column
  • Vertigo columbiana – Columbia Vertigo
  • Vertigo cristata – Crested Vertigo
  • Vertigo modesta – Cross Vertigo
  • Vertigo ovata – Ovate Vertigo

Family Punctidae

  • Paralaoma servilis – Pin-head Spot
  • Punctum randolphii – Conical Spot

 Family Discidae

  • Discus whitneyi – Forest Disc

 Family Pristilomatidae

  • Pristiloma arcticum – Northern Tightcoil
  • Pristiloma chersinella – Black-foot Tightcoil
  • Pristiloma lansingi – Denticulate Tightcoil

 Family Euconulidae

  • Euconulus fulvus – Brown Hive
  • Euconulus praticola – Marsh Hive

 Family Gastrodontidae

  • Zonitoides arboreus – Quick Gloss

 Family Oxychilidae

  • Nesovitrea binneyana – Blue Glass
  • Nesovitrea electrina – Amber Glass

 Family Vitrinidae

  • Vitrina pellucida – Western Glass-snail

 Family Agriolimacidae

  • Deroceras laeve – Meadow Slug
  • Deroceras reticulatum – Grey Fieldslug

 Family Arionidae

  • Arion subfuscus – Dusky Arion

 Family Helicidae

  • Cepaea nemoralis – Grovesnail

 Family Polygyridae

  • Vespericola columbianus – Northwest Hesperian

 Family Thysanophoridae

  • Microphysula cookei – Vancouver Snail


Further reading

  • Forsyth, R.G. “2001″ [2002]. New records for land snails from the mountains of northwestern British Columbia. The Canadian Field-Naturalist 115 (2): 223–228. [pdf here or at Biodersity Heritage Library]