|Drawing of a shell of Boonea bisuturalis|
(Say, 1822) 
Boonea bisuturalis (also known as the three-toothed odostome or the two-groove odostome) is a species of minute sea snail, a pyramidellid gastropod mollusk or micromollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of eleven known species within the Boonea genus of gastropods.
This species is ectoparasitic (an external parasite) on various bivalves and other gastropods. It is notorious as a pest on oyster beds. Its preferred hosts are the common periwinkle Littorina littorea, the mud snail Hyanassa obsoleta or the eastern oyster Crassostrea virginica 
The length of the shell varies between 2.8 mm and 5.8 mm. The smooth shell has a light brownish epidermis. The 5-6 whorls of the teleoconch show an impressed revolving line below the suture. The periphery is obtusely angulated.
This marine species occurs off Gulf of St Lawrence, Canada, and can exceed distribution throughout marine areas ranging from Canada to the state of Delaware, USA. The species is also notable within the Gulf of Maine.
- Say, T. (1822). An account of some of the marine shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia 2: 221-248, 257-276, 302-325
- Bouchet, P. (2011). Boonea bisuturalis (Say, 1822). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=397024 on 2011-03-14
- Robert Robertson and Terry Mau-Lastovicka, The Ectoparasitism of Boonea and Fargoa (Gastropoda: Pyramidellidae); Biol Bull157: 320-333. (October 1979)
- G.W. Tryon, Manual of Conchology vol. VIII p. 357; 1886 (described as Odostomia bisuturalis)
- Totten, J. G. 1834. Description of some new shells, belonging to the coast of New England. American Journal of Science and Arts 26: 366-369, 1 pl.
- Couthouy, J. P. 1838. Descriptions of new species of Mollusca and shells, and remarks on several polypi found in Massachusetts Bay. Boston Journal of Natural History 2: 53-111, pls. 1-3.
- De Kay, J. E. 1843. Mollusca. Zoology of New York 5: [iii] + iv + [iv] + 271 pp., 40 pls
- Bartsch, P. 1909. Pyramidellidae of New England and the adjacent region. Proceedings of the Boston Society of Natural History 34: 67-113, pls. 11-14