Choristella hickmanae

Choristella hickmanae is a species of sea snail, a marine gastropod mollusk in the family Choristellidae.^[1]

Choristella hickmanae
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Family:	Choristellidae
Genus:	Choristella
Species:	C. hickmanae
Binomial name
Choristella hickmanae McLean, 1992

Description

Shell large for genus (maximum diameter 9 mm), spire height relatively low (height-width ratio of holotype 0.72). Shell wall extremely thin, maximum thickness of broken lip 0.1 mm. Surface dull, yellowish white, periostracum not evident, surface finely pitted. Protoconch and earliest teleoconch whorl missing. Remaining whorls 3.5, rounded, smooth; suture deeply impressed. Umbilicus broad, deep, not obstructed by reflection of inner lip. Spiral sculpture represented only by single narrow ridge deep within umbilicus; axial sculpture lacking, growth increments not apparent. Peristome complete, area of contact with previous whorl minimal. Operculum pale brown, nucleus slightly excentric, final three whorls evenly expanding in multispiral pattern. Height 6.5 mm, width 9 mm.^[2]

Distribution

This marine species occurs in the Cascadia Abyssal Plain off Oregon, USA