Plagiodontes is a recent genus of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropods in the family Odontostomidae.

[2][3] Plagiodontes is sometimes considered a subgenus in the genus Cyclodontina.

It occurs in tropical and sub-tropical regions of South America.

[4] The fossil record of Plagiodontes extends back to the Brazilian Paleocene, with a supposed specimen of Plagiodontes dentatus found in Itaboraí Basin.

[5][6][7] Species within the genus Plagiodontes include: