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Pyxidicula stenostoma, from Bartos, 1963

Pyxidicula stenostoma Bartos, 1963

Diagnosis: Shell dark brown, organic, its surface very finely, but irregularly scattered with granules and here and there sparingly covered with very minute mineral pieces. Shell in dorsal view circular, in lateral view hemispherical, ventral side flattened. Ventral side bends strongly inward, thus forming a funnel-shaped pseudostome.

Dimensions: Shell Ø 52 µm, height 35 µm, inward funnel 14 µm high, pseudostome Ø 11 µm.

Ecology: Indonesia, Java; moss.

Remarks: It’s doubtful whether this is a true Pyxidicula species. The inward funnel-shaped pseudostome differs from all known Pyxidicula species. Bartos writes that this could be another genus (“Wahrscheinlich werden die Arten dieser Gattung nach einem grünbdlicheren Studium mindestens in zwei bis drei Untergattungen oder gar Gattungen geteilt.” Probably the species of this genus will be divided after a more thorough study in at least two or three subgenera or even genera.)

Bartos, E.: Rhizopoden einiger Moosproben aus Java – Acta Universitatis Carolinae, Biologica Vol. 1963 No 2 Pag. 119-190.

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