Click on photo to enlarge. Scale line in photo equals 1cm unless otherwise specified.
* Species which are commonly encountered on the beach.
Odostome snails can be difficult to identify and are under study to
sort out the species. Ours were identified by Pyramidellidae
authority Patrick LaFollette of the Natural History Museum, Los
Pyramidellidae Ucluelet, BC
Boonea cf. cincta (Carpenter, 1864)intertidal to shallow subtidal size to 3mm
southern California to southern BC
is very rarely found due to its small size. It has a subtle beaded
sculpture which fades to only spiral grooves near the base of the
(previous name - Odostomia cincta)
Brachystomia angularis (Dall & Bartsch, 1907)
intertidal to 64m size to 6mm
southern California to southeast Alaska
This is rarely found intertidally in our area. The shell is white. The last whorl exhibits an angled lower portion.
(previous name - Odostomia angularis)
Turbonilla aurantia (Carpenter, 1864)Golden Turbonille
intertidal to 37m size to 7mm
California to BC
is rarely found intertidally. The shell is golden-yellow to
reddish-brown. There are 20-22 axial ribs per whorl. They
do not extend to the base of the last whorl. The shell also has
very fine spiral lines.
Aartsenia satura (Carpenter, 1864)
intertidal to shallow subtidal size to 6mm
southern California to BC
This is rarely found intertidally in our area. The shell is yellowish.
(previous name - Odostomia satura)
intertidally on a Mopalia kennerleyi
photographed intertidally on a Tresus capax siphon photographed subtidally on
species tentatively identified as O. tenuisculpta Zirfaea pilsbryi, feeding
Odostomia tenuisculpta Carpenter, 1864intertidal to 55m size to 6mm
northern Mexico to Alaska
is occasionally found intertidally. It is a parasite and has been
found on various species of mollusks. The shell is white to
yellow with microscopic spiral striations. It has a rounded base
and an oval aperture.
It was recently found on Tresus capax which hadn't been observed before. See article here. It was subsequently found in another location on T. capax. Further research shows this species may parasitize the siphons of a wide range of bivalves.
(It was determined this could not be of the genus Evalia.)
Turbonillas are a little understood group in the Pacific Northwest
which need further study. We do not attempt to identify them to
species level at this time, except for T. aurantia.
Our numbering system does not correlate to any other reference, but is
simply our own way to keep track of the types we have found. We
are not sure exactly how many valid species exist in our area.
Turbonilla sp. 4
This page last revised: 2-25-2018
Turbonilla sp. 3 Turbonilla sp. 2 Turbonilla sp. 1