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Zivkovicia compressoidea
Z. compressoidea, a-b after Chardez, 1958; c after Jung, 1942

Zivkovicia compressoidea  (Jung, 1942) new.comb.
Basionym: Pontigulasia compressoidea Jung, 1942

Diagnosis: Shell ovoid and compressed, without any constriction between neck and body.

Dimensions: Jung (1942): Length 173-185 µm; breadth 105 µm, diameter of aperture 38-40 µm. Chardez (1958): Length 190 µm. My measurements: 158-230 µm.

Ecology: Fresh water. Chili, Belgium, Netherlands, Germany.

Zivkovicia compressoidea
Z. compressoidea, a-b the same shell (223 µm), c damaged shell (230 µm); Germany, collected by Wolfgang Bettighofer, 2021
Zivkovicia compressoidea
Z. compressoidea, 158 µm; Naardermeer, the Netherlands, 2021
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