Pyrgocythara helena (Dall, 1919)
kingdom: Animalia >
phylum: Mollusca >
class: Gastropoda Cuvier, 1795 >
subclass: Caenogastropoda L. R. Cox, 1960 >
order: Neogastropoda Wenz, 1938 >
superfamily: Conoidea J. Fleming, 1822 >
family: Mangeliidae P. Fischer, 1883 >
genus: Pyrgocythara Woodring, 1928 >
[1]
Dall, W. H. (1919). Descriptions of new species of mollusks of the family Turritidae from the west coast of America and adjacent regions. Proceedings of the United States National Museum, 56 (2288): 1–86, pls 1–24. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=287389