MILIOLIDAE - Acta Palaeontologica Polonica

138 EWA LUCZKOWSKA
Variability and ontogeny. The large and broad specimens agree in
general with the illustration given by Toula. The juvenile stage taken
out of the inside of such large specimens is more elongated in shape. The
specimen sectioned represents the mega II generation, its proloculus being
180 f! in diameter. The internal structure is regularly triloculine (Textfig.
46/3).
Remarks. - The single specimen figured by the author of the species,
found in Neudorf on March (Devinska Nova Ves) in Czechoslovakia, West
Slovakia, and Triloculina tricarinata d'Orbigny, described by Reuss from
the Miocene of Wieliczka, correspond closely to our specimens. The Recent
specimen of T. tricarinata, which was described from the Black Sea, is
however different from T. neudorfensis. As regards the Recent specimens
of T. tricarinata found in the comparative materials from the Gulf of
Aden, they are much smaller in size and have more acute edges and a
narrower chamber border than T. neudorfensis.
Distribution. - Poland: Tortonian (Karsy, Krywald, Wieliczka). Czechoslovakia:
Miocene, Theben-Neudorf on the March (Devinska Nova Ves)
in Western Slovakia.
Genus Varidentella Luczkowska, 1972
Varidentella georgiana n.sp.
(PI. XXVII, Figs 3a-c, 4a-c; Text-fig. 47)
1971. Quinqueloculina sp.; L. S. Maissuradze, p. 53, PI. 4, Figs 3, 4.
Holotypus: PI. XXVII, Fig. 3a-c.
Paratypus: PI. XXVII, Fig. 4a-c.
Locus typicus: Mach6w 255 bore-hole, depth 73 m.
Stratum typicum: Lower Sarmatian, Syndesmya clays.
Derivatio nominis: georgiana - from Georgia (Caucasus) from which L. S. Maissuradze
distinguished Quinqueloculina sp.
Diagnosis: Test nearly circular, covered densely with longitudinal striae, aperture
transverse-slitlike with a low tape-shaped tooth.
Material. - Over 100 specimens (ColI. No. F-190, Sec. No. 148-151).
Dimensions: Holotype length 0.4 mm; breadth 0.28 mm; thickness
0.2 mm. Paratypes length 0.28-0.35 mm; breadth 0.22-0.26 mm; thickness
0.15-0.20 mm.
Description. - Test circular-oval, periphery rounded; chambers broad
at the base and narrowing towards the aperture, last chamber extended
and inclined towards the penultimate chamber, middle chamber large,
convex, oval; sutures distinct, depressed; wall thin; surface covered
densely with fine longitudinal striae, running sligthly obliquely on the last
chamber; aperture low and broad, sometimes transversely slitlike, with
a low tapeshaped tooth or surrounded with everted border only and
without tooth; the aperture edge strongly sloping, occasionally perpendicular
to the penultimate chamber and somewhat deflected.