From Williams et al., 2017:

[Pyxidiella, Cookson and Eisenack, 1958, p. 51

Type species: Pyxidiella pandora, Cookson and Eisenack, 1958 (pl.6, fig.10)]

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Original description: [Cookson and Eisenack, 1958]:

Description:
Shell longer than broad, with straight or convex sides and rounded ends behind one of which a pylome is developed.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Modified description:

Stover and Evitt, 1978, p. 120:

Synopsis:
Cysts proximate, elongate ellipsoidal, without horns; autophragm uniformly ornamented with features of low relief; paratabulation indicated by archeopyle only, latter intercalary, Type l; archeopyle index >0.5.

Description:
Shape: Subspherical.
Wall relationships: Autophragm only.
Wall features: No parasutural features. Autophragm densely ornamented with features of low relief.
Paratabulation: Indicated by archeopyle only.
Archeopyle: Intercalary, Type I (normally 2a only); occasionally paraplates 1a and/or 3a are free or outlined by parasutures; archeopyle index >0.5; operculum free.
Paracingulum: Not indicated.
Parasulcus: Not indicated.
Size: Small to intermediate.

Affinities:
Pyxidiella differs from Hexagonifera essentially in shape only, being elongate ellipsoidal rather than subspherical to lenticular.