Vitreochlamys is a genus of green algae in the family Chlamydomonadaceae.

[3] It is sometimes known by the name Sphaerellopsis, published by Aleksandr Arkadievich Korshikov.

The cell wall is swollen, giving the appearance of a layer surrounding the protoplast.

[2] Species are distinguished from each other by their cell shape, number of contractile vacuoles and pyrenoids, location of the cell nucleus, and degree of longitudinal striation of the chloroplasts.

[4] The swollen cell wall is gelatinous, and similar in composition to the gelatinous matrices of other colonial algae, such as the Volvocaceae.