MILIOLIDAE - Acta Palaeontologica Polonica

118 EWA·LUCZKOWSKA
elongated, narrowing upwards test shape and in the' more rounded periphery.
Distribution. - Poland: Tortonian (Bogucice, Brzeznica, Gieraszowice,
Gliwice Stare, Grzyb6w, Karsy, Krywald, Ligota Zabrska, Wieliczka).
Austria: Tortonian, Baden, Vienna Basin. Czechoslovakia: Lower Tortonian,
Zidlochovice. Romania: Tortonian, Kostej in Banat. USSR: Middle
Miocene, West Ukraine.
X Pyrgo lunula (d'Orbigny, 1846)
(Pl. XXII, Fig. 5a, b; Text-fig. 3917)
1846. Biloculina lunula d'Orbigny; A. d'Orbigny, p. 264, PI. 15, Figs 22-24.
1868. Biloculina scutella Karrer; F. Karrer, p. 134, PI. 1, Fig. 7.
1952. Pyrgo lunula (d'Orbigny); A. K. Bogdanowich, p. 169, PI. 25, Fig. 6, 7.
1956. Pyrgo lunula (d'Orbigny); A. Sulimski, p. 76, PI. 2, Fig. la-c.
Material. - About 150 specimens (ColI. No. F-171, Sec. No. 433).
Dimensions: L 0.55-1.4; B 0.5-1.5; T 0.35-1.0.
Description. - Test circular, regular, lenticular in cross-section; cham
bers slightly inflated, circular, arcuate in cross-section; periphery acute;
chamber sides fairly broad, undulating, flat or slightly sloping; sutures
distinct; surface smooth, polished; aperture semicircular, somewhat flattened
at the top, with a transverse quadrangular low tooth and lateral
processes.
Variability and ontogeny. The convexity of the chambers and the width
of the aperture and tooth are variable. The specimen sectioned belongs to
the mega I generation; PD 130 ~. The internal structure is biloculine
throughout (Text-fig. 39/7).
Remarks. - This species is very close to Pyrgo amphiconica (Reuss),
but differs in having broader chamber sides, a more flattened test and an
aperture which is less extended laterally. The topotypes from Baden
correspond to d'Orbigny's illustration and to our specimens from the
Upper Tortonian.
Distribution. - Poland: Tortonian (Benczyn, Bogucice, Brzeznica, Gliwice
Stare, Grzyb6w, Krywald, Ligota Zabrska, Suchowola, Wieliczka).
Austria: Tortonian, Baden, Vienna Basin. Romania: Tortonian, Kostej in
Banat. USSR: Upper Tortonian, Volhyn-Podolian Platform.
Pyrgo subsphaerica (d'Orbigny, 1839)
(Pl. XXII, Fig. 4a, b; Text-fig. 39/8)
1839. Biloculina subsphaerica d'Orbigny; A. d'Orbigny, in: Ramon de la Sagra, p. 162,
Pl. 8, Figs .25-27; fide Catalogue Ellis & Messina.
Material. - About 50 specimens (ColI. No. F-l72, Sec. No. 434).
Dimensions: L 0.35-0.75; B 0.25-0.65; T 0.28-0.7.