Anculotus nuttalii Reeve, 1861

Described from “ Oregon ”, Hershler & Frest (1996) considered this to be an incorrect subsequent spelling of nuttaliana Lea, 1838 . Reeve attributed the name Anculotus nuttalii to “Lea MS”, and did not refer to Paludina nuttaliana I. Lea, 1838 . The name is thus neither an incorrect subsequent spelling nor an emendation, but a newly established nominal species founded on its own type material. It was included by Graf (2001), who did not examine the type material. We follow Hershler & Frest (1996) in placing it in the synonymy of Fluminicola nuttalianus ( Lithoglyphidae Tryon, 1866). Anculotus Conrad, 1834 is an incorrect subsequent spelling of Anculosa . This species was omitted by Frest & Johannes (2010).