MILIOLIDAE - Acta Palaeontologica Polonica

98 EWA LUCZKOWSKA
Description. - Test oval, smal, triangular in cross-section, periphery
sUbacute; chambers broad, with slightly inflated .or flat sides, middle
chamber small, faintly inflated, less than one-third the width of the test,
fifth chamber poorly visible or invisible; sutures flat, indistinct; surface
smooth, dull; aperture triangular, large, lyre-shaped, with a long simple
tooth.
Variability. The walls are more or less inflated and, consequently, the
periphery may be more or less rounded.
Remarks. - This species differs from Podolia lyra (Serova) in its more
rounded test shape and subacute, not acute, periphery.
Distribution. - Poland: Upper Tortonian (Grabowiec, Niskowa). USSR:
Upper Tortonian, Podolia.
Genus Pseudohauerina Ponder, 1972
+ Pseudohauerina ornatissima (Karrer, 1868)
(PI. XVIII, Figs 8, 9a-c)
1868. Quinqueloculina ornatissima Karrer; F. Karrer, p. 151, PI. 3, Fig. 2.
1917. Hauerina ornatissima (Karrer); J. A. Cushman, p. 63, PI. 23, Fig. 5a, b.
1946. Hauerina ornatissima (Karrer); J. A. Cushman, p. 5, PI. 1, Fig. 16a-c.
1955. Hauerina ornatissima (Karrer); M. J. Serova, p. 328, PI. 13, Figs 1-4.
Material. - 40 specimens (ColI. No. F-143).
Dimensions: L 0.4-0.7; B 0.35-0.55; T 0.15.
Description. - Test irregularly rounded, flattened, periphery acute;
outer chamber.:; broad, with slightly inflated sides, 2-3 in the last whorl,
middle chambers occupy a small area in the center of the test; surface
covered with 6-8 transverse radiate plications, with concave intervening
areas of the same breadth, filled with small transverse ridges and making
the peculiar ornamentation of the test; sutures flat, indistinct; aperture
triangular, trematophore, with about 10 circular, fairly large pores, placed
at the end of the somewhat contracted last chamber.
Variability. The test shape is variable, as the last chamber of the
3-chambered planospiral stage may be more or less reduced in length.
Remarks. - As was stated by Cushman (1946), this species is often
recognized in both Tertiary and Recent sediments. Observations of this
author indicate however that it occurs only in the Miocene of Europe and
that the Recent species are different. The Recent related species are:
Pseudohauerina occidentalis (Cushman), differing in the rounded, not
acute, periphery, in the more inflated central part of the test, and in the
more numerous ridges on the chambers; P. involuta (Cushman), very close
to P. ornatissima, from which it differs only in its broader chambers and
more abundant plications; P. orientalis (Cushman), which differs in its
more flattened test, gentler plications, and tinier pores in the aperture.