Probably different species.
Lamp shells found washed up on the beach. The whole critter is 2 shells together, one wider and a different shape to the other.
Found on the beach. Obviously from two different individuals. In this area, regularly seen attached to shallow subtidal rocks.
Many of these found washed up on the beach.
Photo scanned from 35mm slide.
red/orange (the one named here) and black brachipods frequent on these beaches; this we colloquially know as 'Grandma's toenails'.
Black brachiopod frequent here
Found in dredge near Friday harbor labs. Various sizes and ages. Found literally hundreds in 2 dredges
I cannot remember which Brachiopod order this living specimen belongs to. I think Terebratulida.
you can tell it is a brachiopod and not a limpet or hipponicid by the ring of hairs extending from around the shell.