Full Text | Download - Grzybowski Foundation - The ...

Alegret, Ortiz & Kaminski (eds.), 2012. Ninth International Workshop on Agglutinated Foraminifera, Abstract Volume
Trochammina quadriloba (Grzybowski) sensu Geroch, 1960 in the Polish
Outer Carpathians
Ewa MALATA
Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, 30-063 Kraków, Poland
e-mail: ewa.malata@uj.edu.pl
An agglutinated foraminifera corresponding to Trochammina quadriloba (Grzybowski) sensu
Geroch (1960) have been found in the foraminiferal assemblages of the Middle-Upper Eocene
variegated marls and shales of the Fore-Magura Thrust. The characteristic features of this
species are a very rough surface of the test and low, trochospiral coiling with three chambers
visible on the umbilical side. Spiral side seems to consist of four chambers however, in some
specimens, particularly with higher coiling, more chambers can be observed. Such a species
was also described by Jurkiewicz (1967) from the Paleogene deposit of the middle part of the
Polish Flysch Carpathians as well as by Samuel (1977) from the Paleogene flysch formations
of the Slovakian West Carpathians.
Geroch (1960) included Grzybowski’s Haplophragmium (Resussina) quadrilobum in
the synonymes of Trochammina quadriloba (Grzybowski). Liszka & Liszkowa (1981) in their
revision of the foraminifera described by Grzybowski in 1896, after examination of only one
specimen from the original collection and basing on their observations from the Cretaceous
red shales rejected the opinion of Geroch (1960) and included Grzybowski’s species into
Trochammina bulloidiformis (Grzybowski). Huss (1966) presenting the agglutinated
foraminifera from the Upper Cretaceous deposits of the Subsilesian Unit also included
Grzybowski’s H. quadrilobum as well as Geroch’s T. quadriloba in the synonyms of T.
bulloidiformis.
Relatively numerous specimens from the Fore-Magura Thrust display some variety but
in general correspond perfectly with the Geroch (1960), Jurkiewicz (1967), and Samuel
descriptions, drawings and stratigraphic occurrence of the taxa determined as Trochammina
quadriloba (Grzybowski). This taxa has been noticed in the Middle-Upper Eocene deposits
and displays quite compact arrangement of chambers in contrary to Grzybowski (1986)
original descriptions and drawings of H. quadrilobum and H. bulloidiforme as well as Huss
(1966) description and illustration of the latter taxa showing spherical, more loosely arranged
chambers and described from the Cretaceous deposits of the Flysch Carpathians.
References:
Geroch, S. 1960. Microfaunal assemblages from the Cretaceous and Paleogene Silesian Unit in the
Beskid Śląski Mts. (Western Carpathians). Biuletyn Instytutu Geologicznego, 153, 7-138.
Grzybowski, J. 1896. Otwornice czerwonych iłów z Wadowic [The foraminifera of the red clays from
Wadowice]. Rozprawy Akademii Umijetności w Krakowie, Wydział Matematyczno-Przyrodniczy,
Kraków, ser. 2, 30, 261-308.
Huss, F. 1966. Otwornice aglutynujące serii podśląskiej jednostki roponośnej Węglówki (polskie
Karpaty Fliszowe). Prace Geologiczne, Polska Akademia Nauk, 34, 1-76.
Jurkiewicz, H. 1967. Foraminifers in the Sub-Menilitic Paleogene of the Polish Middle Carpathians.
Biuletyn Instytutu Geologicznego, 210, 5-116.
Liszka, S. & Liszkowa, J. 1981. Revision of J. Grzybowski’s paper (1896) “Foraminifera of the red
clays from Wadowice”. Annales Societatis Geologorum Poloniae, 51, 153-208.
49