Phymorhynchus agina is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Distribution This marine species has been found in Pliocene strata of Charco Azul, Panama
References
Olsson, Axel Adolf. "Tertiary and Quaternary fossils from the Burica Peninsula of Panama and Costa Rica." (1942): 153–258.