are there more species of Persea or Cryptotaenia
Persea Persea is a genus of about 150 species of evergreen trees belonging to the laurel family, Lauraceae. The best-known member of the genus is the avocado, "P. americana", widely cultivated in subtropical regions for its large, edible fruit.
Aartsenia arctica Aartsenia arctica is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of the two species within the Aartsenia genus, with the exception of the other related species being Aartsenia candida.