Zivkovicia – Microworld

Zivkovicia compressa – drawing by Ferry Siemensma

Genus Zivkovicia Ogden, 1987

Diagnosis: Shell pyriform, often with a distinct constriction of the neck region, either circular or compressed in transverse-section, composed mainly of agglutinate mineral particles bound by an organic cement matrix; aperture terminal, usually circular; internally the shell is partitioned by two circular openings.

For the species described by Penard, look here.

Type species: Zivkovicia compressa (Carter, 1864)
Other species:

Zivkovicia spectabilis (Penard, 1902)
Zivkovicia flexa (Cash & Hopkinson, 1909)
Zivkovicia spiralis

Zivkovicia spec. with three openings

Z. spiralis – drawing Ferry Siemensma

Z. spectabilis

Ferry Siemensma
Created March 6, 2019
Last updated February 14, 2021

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Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec. Diagnosis: Shell pyriform, circular in oral view, with a clear

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