Persististrombus radix is an extinct species of fossil sea snail, a marine gastropod mollusk in the family Strombidae, the conchs.Stromboidea
Fossil record Fossils of Persististrombus radix are found in marine strata of the Oligocene (age range: from 28.4 to 23.03 million years ago.). Fossils are known from Bulgaria, France, Greece, India, Iran and Somalia. Database Paleobiology Database
References
Mathias Harzhauser and Gijs C. Kronenberg The Neogene Strombid Gastropod Persististrombus in the Paratethys Sea