Centropyxis declivistoma  Chardez, 1990

Diagnosis: Shell ovoid, slightly compressed dorso-ventrally, especially in the anterior region, embedded with polymorph mineral platelets. Pseudostome oval, formed by a short visor which covers a small but very elongated and straight aperture. In lateral view, this pseudostome forms an angle of some degrees with the longitudinal axis. In apertural view, this aperture is a simple slit. One long lobopodium observed.

Dimensions: Length 150-154 µm; width 98-100 µm; thickness 70-76 µm; pseudostome 19-20 x 6.5-9.9 µm.

Ecology: Freshwater.

Geographical distribution: Tirol, Austria, Germany.

Remarks: Chardez (1990): “The systematic position of this new species is difficult to decide. The very particular structure and appearance of the shell due to its hue, is reminiscent of Heleopera petricola var. amethystea Pénard, but the pseudostome, although in a narrow slit, is not placed as in Heleopera, but is part of the region which must be considered as ventral. Centropyxis declivistoma therefore falls within the morphological type of simple plagiostome (PLS) as defined by Bonnet (1975).”

References: Chardez, D., 1990. Contribution a la connaissance des Thecamoebiens aquatiques du Tirol allemande (Rhizopoda, Shellacea). Acta Protozool., 29(2):152-156.