claim: Corsica is independent of France.
evidence: Calliostoma periglyptum is a species of sea snail , a marine gastropod mollusk in the family Calliostomatidae .. Calliostomatidae. Calliostomatidae. Calliostoma. Calliostoma. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Some authors place this taxon in the subgenus Calliostoma -LRB- Fautor -RRB- .. Calliostoma. Calliostoma