MILIOLIDAE - Acta Palaeontologica Polonica

MILIOLIDAE FROM MIOCENE OF POLAND 87
in much larger, more elongated and more flattened test shape and in the
distinctly round aperture with a narrow bifid tooth.
Distribution. - Poland: Tortonian (Wieliczka).
* CycZojorina suturata (Smigielska, 1957)
(pl. XII, Fig. 2a-c; Text-fig. 28/4)
1957. Quinqueloculina suturata Smigielska; T. Smigielska, p. 259, PI. 16, Fig. 7.
Material. - 20 specimens (ColI. No. F-193, Sec. No. 371, 372).
Dimensions: L 0.88-1.3; B 0.35-0.5; T 0.2-0.3.
Description. - Test strongly elongated, subquadrangular, tapering at
both ends, periphery narrowly rounded; chambers narrow and elongate,
with flattened sides, somewhat expanded at the base, and with faintly
marked edge, middle chambers distinct, slightly convex; sutures distinct,
depressed; surface smooth, polished; wall thin; aperture at the end of the
somewhat protruding last chamber, round, and with a simple tooth bifid
at the end.
Variability. Distinctive features of the species are the narrow and
much elongated test shape, depressed sutures and flattened sides of the
chambers. The variability of the test shape is of little importance.
Dimorphism and ontogeny. The specimens sectioned belong to the
micro generation; PD 30-40 II (Text-fig. 28/4). The sections show semicircular,
regular chambers gradually increasing in size.
Remarks. - This species differs from CycZojorina hauerina (d'Orbigny)
in having a much more elongated slender test shape. From C. gracilis
(Karrer) it differs in the more slender shape and in the smooth and
polished, not rough and streaky, surface.
Distribution. - Poland: Upper Tortonian (Gliwice Stare, W~glinek).
CycZojorina toreuma (Serova, 1955)
(pI. XIII, Fig. 3a-c; Text-fig. 29/2, 31)
1955. Miliolina toreuma Serova; M. J. Serova, p. 317, PI. 9, Figs 1-3.
1961. Quinqueloculina toreuma (Serova); V. J. Didkovsky, p. 23, PI. 1, Fig. 9.
Material. - 40 specimens (CoIl. No. F-139, Sec. No. 304, 305).
Dimensions: L 0.3-0.5; B 0.25-0.35; T 0.15-0.25.
Description. - Test broadly oval, periphery narrowly rounded;
chambers broad, narrowing towards the end and with flattened sides,
subtriangular in cross-section, middle chamber short and broad, slightly
oblique, fifth chamber small but clearly visible; sutures distinct, depressed;
surface smooth and polished, covered with 6-8 longitudinal ribs which
are irregular, occasionally bifurcated or interrupted, placed mostly on the
periphery and leaving the sides of chambers free; wall thin; aperture