Pyrgophorus platyrachis is a species of very small aquatic snail, an operculate gastropod mollusk in the family Hydrobiidae.
Description The maximum recorded shell length is 5.3 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
Habitat The minimum recorded depth for this species is 0 m, and the maximum recorded depth is 0 m.
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