| Adelomelon, Amoria guttata, Amoria molleri|
Adelomelon riosi, common name Rios's volute, is a species of sea snail, a marine gastropod mollusk in the family Volutidae, the volutes.
Adelomelon riosi Wikipedia
The length of the shell varies between 200 mm and 315 mm.
This marine species occurs off the Atlantic coast of South America, from Brazil to Argentina.