Family Astartidae & Carditidae
Click on photo to enlarge. Scale line in photo equals 1cm unless otherwise specified.
* Species which are commonly encountered on the beach.
off west coast Vancouver Is., BC
Islands, WAAstarte compacta Carpenter, 1864Compact Astartesubtidal, 10-200m Puget Sound, WA to the central Aleutian Islands, AK size to 30mmThis species has low, broad commarginal ribs with a thick hinge plate and large teeth. The periostracum is generally light brown and silky. The hinge teeth are large.
(synonym - Astarte willetti)
Pribilof Islands, AK
Kasitsna Bay, AKAstarte borealis (Schumacher, 1817)Boreal Astarte
intertidal to 50m size to 55mm
north central BC to Arctic; througout Bering Sea; Circumboreal
species has small commarginal ribs near the early portion of the shell
and a thick, olive- brown to black periostracum.
(previous name - Tridonta borealis)
Tunstall Bay, BC
Masset, Haida Gwaii, BCAstarte esquimalti (W. Baird, 1863)Wavy-Line Astartesubtidal, 50-200m Puget Sound, WA to the Beaufort Sea and west to Sea of Okhotsk size to 23mmThis species has variable sculpture, from distinct wavy irregular ribs to fine, only slightly irregular ribs, to a nearly smooth surface with only a few wavy ribs near the umbones. The periostracum may be tan to black.(previous name - Crassatella esquimalti)
Kasitsna Bay, AK Barkley Sound, BC
Glans carpenteri (Lamy, 1922)Carpenter Carditid
intertidal to 100m size to 15mm
northern Mexico to northern BC
This species is infrequently found intertidally.
The distinctive shell is small and elongated.
It has about 14 robust radial ribs.
(synonyms - Lazaria subquadrata,
San Juan Islands, WA
off central BC coast Cyclocardia ventricosa ventricosa (Gould, 1850)Stout Carditidsubtidal, 20-450m size to 27mmnorthern Mexico to central AlaskaThis species has about 20 low, broad radial ribs overlain with commarginal ribs. The periostracum is light to dark brown. This is the most abundant species on the temperate easternPacific Coast. There are three geographic subspecies. Cyclocardia ventricosa ventricosa occurs from central Californiato central Alaska. C. ventricosa montereyensis and C. ventricosa redondoensis are the more southern subspecies.
(synonym - Cardita ventricosa)
Esperanza Inlet, BC
Miodontiscus prolongatus (Carpenter, 1864)Elongate Carditid
subtidal, 5-210m size to 12mm
southern California to central Alaska; also the Kuril Islands
to northern Japan, but not reported from the Aleutian Islands
This species has about 10 broad, shallow radial ribs with
narrow interspaces. It sometimes has deep commarginal
(synonyms - Miodon prolongatus, Venericardia yatesi,
Astarte elliptica (Brown 1827)
subtidal 20-250m size to 35mm
circumboreal; northern Alaska to Puget Sound, WA and
also south to the UK, Massachusetts and the Sea of Japan
This species has prominent, widely spaced, commarginal
ribs. The beak is pointed distinctly toward the anterior side.
(synonyms - Crassina elliptica, Astarte alaskensis)
This page last revised: 11-17-2015
Carditidae Kodiak, AKCyclocardia crassidens (Broderip & Sowerby, 1829)Thick Carditasubtidal, 1-200m size to 40mm
Quadra Is., BC to north Alaska and across to Kamchatka and north Japan
This shell may be very thick and slightly variable in shape. The periostracum is thick and relatively smooth.
(synonyms - Astarte crassidens)