As I keep dreaming about the time when I will be able to start a real Camino :rolleyes:, I was thinking about the origin of the shell represented in the Compostela. I mean the so called concha (the shell), not the symbol.
As everyone knows, I guess, it is a shell of the Pectinidae family, which features between 250 and 900 species (the subject is controversial, though.) If, however, one also includes fossil species, then one reaches about 7000 different species. The Pectinidae have had a...