Hi Paul et al,
Emily Vokes sez all three (brunneus, microphyllus, torrefactus) are valid.
Isn't taxonomy wonderful?
A major distinguishing feature is that microphyllus has 2-3 intervarical
nodes and torrefactus has only one. All three are tropical Indo-Pacific,
not Point Barrow?
Paul, I also think that color is a poor distinguishing feature for most
mollusks, but especially Murcidae and Pectinidae...
Best regards
John Wolff
2640 Breezewood Dr.
Lancaster, PA 17601, U.S.A.