MILIOLIDAE - Acta Palaeontologica Polonica

100 EWA LUCZKOWSKA
Remarks. - This species differs from Recent .Sigmoilopsis arenaria
(Brady), in having a thicker wall imd a shorter neck. Reuss claims that
S. foeda is abundant in the Miocene of Wieliczka and this is also true of
our materials from that locality. The illustration of Reuss is not clear
enough and for this reason the topotype is figured in the present paper
(PI. XV, Fig. 5). Sigmoilina plana Smigielska, 1957, from the Miocene of
Gliwice Stare does not differ from the specimens of this species from
Wieliczka. It differs from Sigmoilina abbreviata Vehglinsky, 1967, from
the Burdigalian of the Transcarpathians, in having a much broader test,
more coarse-grained wall, and much shorter, poorly developed neck. From
Sigmoilopsis wanganuiensis Vella, 1957, from the ·Holocene· of New
Zealand it hardly differs at all, but it is difficult to state if it is synonymous
with S. foeda because of the lack comparative materials from
New Zealand. S. foeda is often determined as S. coelata (Costa, 1855), from
the Tertiary of Italia, which species however seems different.
Distribution. - Poland: Tortonian (Gliwice Stare, Grabki Duze, Karsy,
Korytnica, Krywald, Ligota Zabrska, L~ki Dolne, Wieliczka). Austria:
Miocene, M611ersdorf, Vienna Basin. Czechoslovakia: Tortonian, Devinska
Nova Ves, Zidlochovice.
Genus Siphonaperta Vella, 1957
* Siphonaperta granulata (Smigielska, 1957)
(PI. XIV, Figs. 5a, b, 6a, b; Text-fig. 34/2)
1957. Sigmoilina granulata Smigielska; T. Smigielska, p. 260, PI. 16, Fig. 14a, b.
Material. -130 specimens (ColI. No. F-153, Sec. No. 417).
Dimensions: L 0.6-1.1; B 0.4-0.6; T 0.25-0.4.
Description. - Test oval, tapering at both ends, irregular, occasionally
S-shaped, triangular in cross-section, periphery subrounded; chambers
narrow, tubular, the basal end of the last chamber usually protruding and
curved, the apertural end sometimes bent to the back and giving the
chamber its S-shaped appearance, middle chambers large, tubular,
elongated and strongly projecting beyond the surface of the test; sutures
strongly depressed; wall with a number of coarse sand grains in the
surface layer of calcareous cement; surface very rough, studded with sand
particles of different size and shape in a disorderly manner; aperture
circular, at the end of a very short neck, extending beyond the outline of
the test, with an exserted lip and a short narrow or quadrate tooth.
Variability and ontogeny. The test shape varies from oval to S-shaped.
The extension of the chamber is also variable, being very short or lacking
at all. The characteristic features of the species are very prominent
chambers, with deep grooves between them. The internal structure is
irregularly quinqueloculine, the chambers increase considerably in size