''Fluminicola nuttallianus'', common name dusky pebblesnail, is a possibly extinct species of

freshwater snail Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs ...

with an operculum, an aquatic

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family

Lithoglyphidae Lithoglyphidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. This family is in the superfamily Truncatelloidea and in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by ...

. ''Fluminicola nuttallianus'' is the type species of the genus ''Fluminicola''.Hershler R. & Frest T. J. (1996). "A review of the North American freshwater snail genus ''Fluminicola'' (Hydrobiidae)". '' Smithsonian Contributions to Zoology'' 583: 1-41
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Distribution

This species occurs (or occurred) in Oregon, USA.''Fluminicola nuttallianus''
NatureServe Explorer, accessed 28 May 2011.

Description

''Fluminicola nuttallianus'' has several (not exactly counted) rows of teeth on its

radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food ...

. Each row has 2-3 central basocones, 4-5 central octocones, 7-8 lateral teeth, ca. 16 inner marginal teeth and 12-13 outer marginal teeth.Thompson F. G. (1984). "North American freshwater snail genera of the hydrobiid subfamily Lithoglyphinae". '' Malacologia'' 25(1)
109
141.

References

Lithoglyphidae Extinct gastropods Gastropods described in 1838 {{Lithoglyphidae-stub