Centropyxis platystoma
Centropyxis platystoma
C. platystoma, c. 60 µm, in ventral view and lateral view

 

 

Centropyxis platystoma (Penard, 1890)

 

Diagnosis: shell of medium size, variable in size and shape, elliptical or sometimes broad ovoid in front view, more or less flattened; aperture at the border of the shell, eccentric, largely elliptic or nearly circular, deeply invaginated; a visor expands fan-like above and around the aperture; there is a more or less distinct incision between body and visor, giving the test the shape of an 8; visor usually flattened, but broad, hence the name: platys = broad, stomatos = mouth (Greek); shell covered with closely-set sand grains and/or diatoms, giving a grey color to the test; fundus sometimes with some larger mineral grains.

 

Centropyxis constricta