Mitromorpha aspera
Mitromorpha aspera is a species of sea snail, a marine gastropod mollusk in the family Mitromorphidae. Description
The reddish brown shell is spirally lirate and longitudinally closely costulate, the intersections forming a roughly aspirated surface. Distribution
This marine species occurs in the Pacific Ocean off California, USA. References

 Carpenter. Jour, de Conch., xii, 146, 1865

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aspera
Gastropods described in 1864
Taxa named by Philip Pearsall Carpenter