Amnicola andersoni Arnold, 1909 † accepted as Hydrobia andersoni (Arnold, 1909) † (original description)
Anodonta kettlemanensis Arnold, 1909 † (original description)
Carinifex marshalli Arnold, 1909 † accepted as Helisoma marshalli (Arnold, 1909) † (original description)
Gonidea coalingensis Arnold, 1909 † (original description)
Gonidea coalingensis var. cooperi Arnold, 1909 † accepted as Gonidea coalingensis Arnold, 1909 † (original description)
Goniobasis kettlemanensis Arnold, 1909 † accepted as Juga kettlemanensis (Arnold, 1909) † (original description)
Physa wattsi Arnold, 1909 † accepted as Physella wattsi (Arnold, 1909) † (original description)
Planorbis vanvlecki Arnold, 1909 † accepted as Planorbifex vanvlecki (Arnold, 1909) † (original description)
Sphaerium cooperi Arnold, 1909 † accepted as Sphaerium striatinum (Lamarck, 1818) (original description)
Sphaerium kettlemanensis Arnold, 1909 † accepted as Sphaerium kettlemanense Arnold, 1909 † (original description)