MILIOLIDAE - Acta Palaeontologica Polonica

112 EWA LUCZKOWSKA
Quinqueloculina guriana Djanelidze has also been synonymized with
A. ucrainica although this author reports that the difference between these
two forms consists in the presence of a keel on the last chamber of
A. ucrainica. Since in the description of this species the author did not
mention the presence of the keel, and neither itis figured in the illustrations
of A. ucrainica, this feature has been omitted in the present description.
Distribution. - Poland: Upper Tortonian (Bogucice, Ligota Zabrska,
Rytwiany, W~glin). Romania: Lower Sarmatian, the Moldavian Platform.
USSR: Upper Tortonian, Volhyn-Podolian Platform, West Ukraine,
Georgia.
Affinetrina voloshinovae timenda (Chutzieva, 1960)
(pI. XXVI, Fig. 5a-c; Text-fig. 38/6)
1960. Quinqueloculina voloshinovae (Bogdanowich) var. timenda Chutzieva; in
A. K. Bogdanowich, p. 245, PI. 1, Figs 5, 6.
Material. - 40 specimens (ColI. No. F-164, Sec. No. 404, 405).
Dimensions: L 0.25-0.35; B 0.15-0.25; T 0.12-0.2.
Description. - Test very small, oval in shape, periphery rounded;
chambers somewhat inflated, broad at the base and narrowing towards
the aperture, middle chamber small and narrow; sutures depressed,
indistinct, masked with ornamentation; wall thin; surface ornamented
with short irregular ridges, running in different directions; aperture very
narrow, high, parallel to the flattening of the test and filled with a long
narrow tooth.
Variability. This species is characterized by its ornamentation which is
irregular and variable. There exist spinose or nodulose protuberances
in some specimens and they are prominent in the lower part of the
chambers and disappear near the aperture.
Dimorphism and ontogeny. The specimens sectioned represent the
micro generation; PD 30 fl. The internal structure is triloculine, the
chambers of the last whorl are irregularly triloculine (Text-fig. 38/6).
Remarks. - This species morphologically resembles Affinetrina cubanica
(Bogdanowich, 1947), but differs in the ornamentation of the test.
It is very close to Varidentella nanae (Maissuradze) in its shape and
ornamentation, but differs in the distinct high and narrow aperture with
a long tooth, and not broad and low with a quadrate tooth. It is quite like
Triloculina taiwanica Ishizaki, 1943, from the Pliocene of Formosa, differs
however in having a higher test, tapering at the top, a narrower aperture
and the ornamentation composed of irregular ridges, not of irregular
costae.
Distribution. - Poland: Lower Sarmatian, (Dwikozy, Grzyb6w, Zrecze).
USSR: Middle Sarmatian, West Precaucasian region.