MILIOLIDAE - Acta Palaeontologica Polonica
MILIOLIDAE - Acta Palaeontologica Polonica
MILIOLIDAE - Acta Palaeontologica Polonica
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58 EWA l.UCZKOWSKA<br />
Description. - QS oval or narrowly oval, trapezoid in cross-section,<br />
periphery acute; chambers flat, narrow, arcuate, middle chamber oval,<br />
flat, tapering at both ends, fifth chamber appears as a narrow ridge;<br />
MS much flattened, broadly oval, periphery acute; chambers broad, flat,<br />
arcuate, two middle chambers are usually seen on both sides of the test;<br />
in adult specimens the narrow, prominent ridge of the third chamber is<br />
besides visible between them; sutures flat, distinct; surface smooth,<br />
polished; wall thin; aperture oval, with flexuose margins and thickened<br />
rim, and with a long bifid tooth.<br />
Variability. The test shape and the degree of test flattening are variable.<br />
Quinqueloculine forms are narrowly oval and elongated, becoming<br />
more rounded and flattened as massiline chambers increase in number.<br />
Dimorphism. Massiline forms are of the mega I and micro generations<br />
(Text-fig. 15/1, 2). Quinqueloculine forms represent only the mega I generation<br />
(Text-fig. 15/3). The differentiation of generations is not marked<br />
in morphology. PD: micro - 20 Il, mega I - 60-120 fl. Quinqueloculine<br />
forms are abundant and massiline forms rare.<br />
Remarks. - This species differs from Quinqueloculina haidingeri<br />
d'Orbigny in having a more elongate shape, more flattened test, a more<br />
acute periphery and thinner walls. From Q. dichotoma (Reuss) it differs<br />
in its smooth, not striated surface. The shape of both these species is<br />
almost identical, being however more flattened in Q. peregrina.<br />
Distribution. - Poland: Lower Tortonian (Grabki Duze, Karsy, Korytnica).<br />
Austria: Lower Tortonian, the vicinity of Baden, Vienna Basin.<br />
Czechoslovakia: Lower Tortonian, Zidlochovice, Devinska Nova Ves. Italy:<br />
Miocene, Siena and Toscania region.<br />
Quinqueloculina pseudobuchiana sp.n.<br />
(PI. IV, Fig. 5a-c, PI. V, Figs la, b; 2a, b; Text-fig. 20)<br />
1952. Miliolina ungeriana (d'Orbigny); A. K. Bogdanowich, p. 110, PI. 10, Fig. 3a-c<br />
(non 2a, b).<br />
Ho!otypus: PI. V, Fig. 2a, b.<br />
Paratypi: PI. IV, Fig. 5a-c, PI. V, Fig. la, b.<br />
Locus typicus: Korytnica near JE:drzej6w.<br />
Stratum typicum: Lower Tortonian (Badenian), gray clay marls.<br />
Derivatio nominis: pseudobuchiana - false Q. buchiana.<br />
Diagnosis. - Test broadly oval, chambers slightly inflated, periphery<br />
subacute, not keeled, middle chamber with slightly prominent edge, fifth<br />
chamber poorly visible.<br />
Material. - About 120 QS and about 50 MS (ColI. No. F-111, Sec.<br />
No. 97-101, 227-231, 256, 269-272, 354, 355).<br />
Dimensions: Holotype MS - length 2.0 mm, breadth 1.5 mm, thickness<br />
0.75 mm; Paratypes QS - length 0.7-2.2 mm, breadth 0.6-1.6 mm,