The Centropyxis aerophila Complex (Protozoa: Testacea)

The Centropyxis aerophila complex 267
Figs. 48-55. Centropyxis sylvatica, selected small (“transparent”) specimens (48-53) and a large opaque specimen (54, 55) identified with the
characteristics given by Deflandre (1929), in the light (48-53) and scanning electron microscope (54, 55). Arrow in Figs. 51 and 52 marks minute
groove, where the inner pseudostome abuts to the dorsal shell wall. 48-51 - same specimen (size 68 x 74 x 46 µm) in ventral view, where the
inner pseudostome is not recognisable; in oblique ventral view, where the pseudostome becomes minute; in frontal view, where the broadly
elliptical inner pseudostome is well recognisable (arrowheads); and in lateral view, where the lip perforation (inner pseudostome, arrowheads)
is difficult to recognise; 52, 53 - lateral and frontal view of another specimen showing the inner pseudostome (arrowheads); 54, 55 - ventral
view of same specimen at low and high magnification showing impressively the outer (arrow) and inner (arrowheads) pseudostome, length
94 µm. The inner pseudostome is obviously made of small xenosomes attached to the dorsal wall of the shell and the lateral walls of the outer
pseudostome