MILIOLIDAE - Acta Palaeontologica Polonica

74 EWA l.UCZKOWSKA
Voslau, Vienna Basin, as well as our specimens show a bifid tooth not
a simple one as recorded by d'Orbigny.
Dimorphism and ontogeny. The specimen sectioned belongs to the
micro generation; PD 50J.t. The cross-section shows tubular initial chambers,
only from the 6th or 7th chamber onward the shape of chambers is
trapezoid (Text-fig. 25.)
lmm
Fig. 25. Internal structure of Cycloforina badenensis (d'Orbigny), Lower Tortonian,
Korytnica, micro generation; a front view, b apertural view, c cross-section.
Remarks. - In its angular periphery this species resembles Cydoforina
contorta (d'Orbigny) which however differs in having an elongated and
less regular test shape, carinate edges and rough surface covered with
short fine longitudinal streaks. The specimens investigated are identical
with C. badenensis from Voslau (Vienna Basin).
Distribution. - Poland: Tortonian (Benczyn, Bogoria, Karsy, Korytnical.
Austria: Tortonian, the vicinity of Baden, Vienna Basin. Czechoslovakia:
Lower Tortonian, Zidlochovice. Hungary: Tortonian, vicinity of
Budapest. Tortonian and Sarmatian, Mecsek Mts. USSR: Middle Miocene,
West Ukraine, southern border of the Russian Platform, North Caucasian.
+ Cycloforina contorta (d'Orbigny, 1846)
(Part I, PI. XII, Fig. 3a-c; Part II, PI. XI, Figs 2a, b, 3a, b; Text-Fig. 26)
1846. Quinqueloculina contorta d'Orbigny; A. d'Orbigny, p. 298, PI. 20, Figs 4-6.
1952. Miliolina contorta (d'Orbigny); A. K. Bogdanowich, p. 109.
Material. - Over 100 specimens (Call. No. F-150, Sec. No. 161, 162,
167-170).
Dimensions: L 0.8-1.4; B 0.45-0.8; T 0.3-0.5.
Description. - Test regular, narrowly oval, periphery angular and
arcuate, of uniform width, and keeled; chambers narrow, with flattened