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.
Zivkovicia spec. with three openings
Zivkovicia spiralis – drawing Ferry Siemensma
Zivkovicia spec.