Click on photo to enlarge. Scale line in photo equals 1cm unless otherwise specified.
* Species which are commonly encountered on the beach.
Mitrella aurantiaca (Dall, 1871)
intertidal to subtidal size to 4.5mm
northern Mexico to southern BC
is very rare to find in the Pacific Northwest and has locally only been
found on the west coast of Vancouver Island. The shell is very
small with a yellowish-brown shell. It may have a pattern of
brown chevron markings. In contrast, our locally common species, A. carinata, has wavy, irregular markings.
(previous names - Alia aurantiaca, Astyris aurantiaca)
This page last revised: 5-25-2019
Amphissa versicolor Dall, 1871
Joseph's Coat Amphissa
intertidal to 46m northern Mexico to southern BC size to 19mm
This is extremely rare to find north of Oregon. It has similar coloring to A. columbiana.
It can be differentiated by its ribbing which is at an angle to
the central axis. This species also does not grow as large as A. columbiana.
(synonyms - Amphissa incisa, Amphissa lineata)