Gudeodiscus phlyarius is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Plectopylidae.
Gudeodiscus phlyarius is the type species of the genus Gudeodiscus.
The distribution of Gudeodiscus phlyarius includes Vietnam.
It is a ground-dwelling species as all other plectopylid snails in Vietnam.
It co-occur with other plectopylids in Vietnam: with Gudeodiscus anceyi, Gudeodiscus messageri raheemi and with Gudeodiscus villedaryi. Gudeodiscus francoisi, Gudeodiscus giardi, Sicradiscus mansuyi, Gudeodiscus dautzenbergi and Gudeodiscus suprafilaris live at geographically close sites to Gudeodiscus phlyarius.