The native peoples of Mexico, especially the Mixtec, dyed their fabrics with an excretion from a snail called Purpura patula pansa, which was related to a snail used by the Tyrians.
Šie gliemeži, kuru zinātniskais nosaukums ir Purpura patula pansa, ir radniecīgi tiriešu izmantotajiem purpurgliemežiem.