MILIOLIDAE - Acta Palaeontologica Polonica

40 EWA LUCZKOWSKA
Q. schweyeri Bogdanowich from the Konka horizon (Middle Miocene) it
differs in its broadly rouded periphery and more numerous striae.
Distribution. - Poland: Lower Tortonian (Korytnica, Karsy, Benczyn).
USSR: Konka (Middle Miocene), the western Forecaucasian region and
the West Ukraine.
Quinqueloculina anagallis sp.n.
(PI. I, Figs. la-c, 2a, b, 3a-c; Text-figs 7-9, 11/1, 4)
Holotypus: PI. I, Fig. 2a, b.
PaTatypi: PI. I, Figs la-c, 3a-c.
Locus typicus: Karsy near JE:drzej6w.
StTatum typicum: Lower Tortonian (Badenian), gray clay marls.
DeTivatio nominis: anagallis (Lat.) - ornamented.
Diagnosis. - Periphery sharply keeled, wall ornamented with numerous
arcuate ribs, which form a rotatory pattern on the surface.
Material. - 20 QS and about 200 MS (ColI. No. F-I03, Sec. No.9, 12,
47-52, 54-58, 213, 216, 236-238, 240, 241).
Dimensions: Holotype MS length 1.7 mm, breadth 1.45 mm, thickness
0.5 mm; Paratypes QS length 0.5-1.25 mm, breadth 0.45-0.95 mm,
thickness 0.25-0.75 mm; MS length 1.6-2.3 mm, breadth 1.3-2.1 mm,
thickness 0.4-0.7 mm.
Description. - Quinqueloculine stage broadly oval, triangular or trapezoid
in cross-section, periphery acute; chambers broad and flattened,
middle chamber large, projecting and somewhat sloping, with distinct
acute edge, fifth chamber visible as a narrow band; massiline stage large,
flat, nearly circular, rhomboid in cross-section, periphery acute and
keeled; last two chambers very broad with slightly inflated sides, very
small middle chamber forms a small ridge in the central part of the test,
surrouded with an annular depression, beside it there are sometimes
traces of 1-2 flat chambers; sutures distinct, slightly depressed; surface
smooth, polished, covered with numerous prominent arcuate ribs, which
are often parallel to the periphery in quinqueloculine specimens, but
usually slightly oblique to the periphery in massiline specimens; wall
thin; aperture large, oval, surrouded with a thickened rim and with a long
and bifid tooth; it is parallel to the acute periphery in massiline specimens,
and oblique in quinqueloculine specimens.
Variability. A distinctive feature of the species is the wall ornamentation,
in the richness of which some specimens differ somewhat from each
other. The shape of test is invariable.
Dimorphism. Specimens of the microspheric, megalospheric I and
megalospheric II generations have been observed. The massiline forms
are mainly megalospheric II (Text-fig. 7), the megalospheric I generation
is less numerous (Text-fig. 8) and the microspheric generation is quite