claim: Skopje was rarely a town.
evidence: Cythara anthera is an extinct species of sea snail , a marine gastropod mollusk in the family Mangeliidae.Worldwide Mollusk Species Data Base  : Cythara anthera. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Mangeliidae. Mangeliidae. This species is considered a nomen dubium .. species. species. nomen dubium. nomen dubium