MILIOLIDAE - Acta Palaeontologica Polonica

62 EWA LUCZKOWSKA
1962. QuinqueZoculina badenensis pZanocarinata Venglinsky; 1. V. Venglinsky, p. 75,
PI. 5, Fig. la-c.
Material. - Over 150 QS (ColI. No. F-113, Sec. No. 307-311).
Dimensions: L 0.55-0.62; B 0.38-0.45; T 0.30-0.35.
Description. - Test rhomboidal, regular, periphery narrowly rounded
and slightly truncate; chambers narrow, of uniform width, arcuate,
trapezoid in cross-section, middle chambers large, strongly projecting,
fifth chamber well marked, convex; sutures depressed, distinct; wall thick;
surface smooth, polished; aperture small, triangular or semicircular in
shape, with a short and broad, quadrangular, not bifid, tooth.
Variability. Distinctive features of the species are its slight morphological
variability, very regular internal structure, truncate periphery
and triangular or semicircular aperture. Only the shape of the tooth varies
markedly from quadrangular to transversely rectangular or tape-shaped,
being sometimes completely reduced. Such specimens with a reduced
tooth were probably used by Reuss in describing the species.
Dimorphism and ontogeny. All specimens sectioned represent the micro
generation; PD 20-30 fl. The sections show very thick walls and the
unusually regular arrangement of low and wide, but constantly trapezoid
chambers (Text-fig. 21/1,2).
Remarks. - This species much resembles Cyclojorina suturalis (Reuss),
which however differs in its more oval, not rhomboidal, shape of the test,
rounded, not truncate, periphery and circular, not triangular or semicircular,
shape of the aperture. Q. regularis is probably related to Q. padana
Perconig, from the Upper Pliocene of Italia and to Q. pentagona
Giunta from Recent of the vicinity of Genoa, but these species have
a much more truncate periphery in comparison with Q. regularis. This
species corresponds rather to the genus Varidentella in its type of the
aperture and tooth, although it has a typically quinqueloculine internal
structure. It belongs, together with Q. pygmaea, to the supposed group of
intermediate forms between the genera Quinqueloculina and Varidentella.
Distribution. - Poland: Tortonian (Brzeznica, Budy, Chelm n/Rabq,
Gliwice Stare, Grzyb6w, Ligota Zabrska, Krywald, Wieliczka, Zrecze,
Zglobice). Austria: Tortonian, the vicinity of Baden, Vienna Basin.
Czechoslovakia: Tortonian, Devinska Nova Ves. USSR: Upper Tortonian,
the Precarpathian Foredeep and Transcarpathians.
Quinqueloculina spondiungeriana (Serova, 1955)
(pl. X, Fig. 1a-c; Text-fig. 22)
1955. MiZiolina spondiungeriana Serova; M. J. Serova, p. 307, PI. 3, Figs. 1-3.
1961. QuinqueZoculina spondiungeriana (Serova); V. J. Didkovsky, p. 49, PI. 9, Fig. 1.
Material. - Over 100 QS (ColI. No. F-l14, Sec. No. 131-132).
Dimensions: L 1.0-1.4; B 0.55-0.75; T 0.35-0.50.