Dove-shell fans,

I've got a 9mm gastropod from western Costa Rica, almost certainly a
columbellid, that doesn't fit neatly with anything from Keen's book nor from
Radwin's papers on western Atlantic columbellids.

It's slender, almost perfectly biconic, with aperture less than half the
length. No axial ribbing except faintly on the first teleoconch whorls
(Zafrona?), but the periostracum is axially arranged. The primary sculpture
is spiral grooving (Cosmioconcha?), even above the periphery. Outer lip has
small denticles.

Anyone game to look at some images?

David Kirsh
Durham, NC