MILIOLIDAE - Acta Palaeontologica Polonica

MILIOLIDAE :fROM MIOCENE OF POLAND 1.11
ours. Morphologically our species much resembles Triloculina ukrainica
(Serva) var. satanovi Didkovsky from the Upper Tortonian (Badenian)
of Ukrainian SSR, but differs distinctly in the rough,longitudinally
irregularly striated surface.
Distribution. - Poland: Upper Tortonian (Gliwice Stare, W£:glinek).
Cuba and Jamaica: Recent.
Affinetrina ucrainica (Serova, 1952)
(PI. XXVI, Fig. 3a-c; Text-fig. 38/4)
1952. Miliolina ucrainica Serova; in: A. K. Bogdanowich, p. 104, PI. 8, Fig. 2.
1955. Miliolina cuneata (Karrer) var. ucrainica Serova; M. J. Serova, p. 308, PI. 3,
Figs 7-9.
1959. Triloculina confirmata Krasheninnikov; V. A. Krasheninnikov, p. 83, PI. 7,
Fig. 3a-c.
1961. Triloculina ukrainica (Serova) var. ukrainica (Serova); V. J. Didkovsky, p. 94,
PI. 19, Fig. la-c.
1968. Triloculina ukrainica (Serova); B. Ionesi, p. 263, PI. 11, Figs 18-20.
1970. Quinqueloculina guriana Djanelidze; O. Djanelidze, p. 101, PI. 19, Fig. 4a-c,
cum syn.
Material. - 20 specimens (Coli. No. F-163, Sec. No. 402).
Dimensions: L 0.3-0.65; B 0.2-0.45; T 0.15-0.35.
Description. - Test oval-quadrangular, periphery rounded; chambers
broad and curved at the base, become straight and narrow towards the
end, middle chamber oval and small; sutures slightly depressed; wall
thick; surface smooth, polished; the aperture occurs as a high narrow slit,
parallel to the flattening of the test, filled with a thin longitudinal tooth.
Dimorphism and ontogeny. The micro generation with the P diameter
30 If1 has been found; its internal structure is cryptoquinqueloculine. The
shape of chambers is invariably semicircular in cross-section (Text-fig.
38/4).
Remarks. - This species differs from Affinetrina cubanica (Bogdanowich)
in the larger and more elongated test shape, thiner walls, and
aperture parallel and not oblique, to the flattening of the test. It has also
a cryptoquinqueloculine, not triloculine internal structure in the adult
stage, and semicircular, not sickle-shaped, chamber cross-sections. It is
very similar to Quinqueloculina seminulum meotica (Gerke) and to
Q. pseudocuneata Gerke (in Bogdanowich, 1969), but differs from the first
form in its more rounded periphery and higher test, and from the other
form in the higher and narrower aperture. Both forms are compared
by Gerke with Q. seminulum or were described before as "varieties" of
Q. seminulum. However, judging from the description and illustrations
both these forms have a little in common with Q. seminulum, because the
type of aperture refers them to the genus Affinetrina, and their internal
structure, according to Gerke, is cryptoquinqueloculine. On the basis
of these characters, they should be included in the genus Affinetrina.