Urosalpinx aspinosus
Urosalpinx aspinosus is an extinct species of sea snail, belonging to the family Muricidae, which includes murex snails or rock snails. It was a marine gastropod mollusk. Description
The length of the shell attains 10 mm. Distribution
Fossils were found in Oligocene strata of Mississippi, USA. References

External links
 Harnik, Paul G. ; Macroecological drivers of extinction risk in early Cenozoic mollusks; The University of Chicago ProQuest Dissertations Publishing,  2009. 3369451. aspinosus
Gastropods described in 1886
Oligocene gastropods