Noremia, a new microfossil genus from the Hungarian eocene, and systematical and stratigraphical problems about the Crassosphaeridae (dedikált példány) [antikvár]

ncremia. a new microfossil genus from the hungarian eocene, and systematica!. and stratigraphical problems about the crassosphaeridae (Micrcpaleontological Investigations in the Basin of Dudar I) M. Kedves Institute of Botany, University of Szeged INTRODUCTION Norem's [1955] description of the genus Tytthodiscus has opened a new chapter of micropaleontological investigations. Two species, T. californiensis Norem 1955 and T. chondrotus Norem 1955, are described in his paper. Soon after this publication, the investigations of Eisenack [1957], Gocht [1959], Solé de Porta [1959, 1961], and Venkatachala & Baltes [1962] furnished additional data about the new genus. Besides that, Gocht's paper [1959] is significant because in his opinion Tasmanites mourai Sommer 1956, published by Sommer [1956], has to be placed into the Tytthodiscus Norem 1955 genus. Gocht [1959] put the genus Tytthodiscus Norem 1955 taxo-nomically into the Leiosphaeridae family, and did not separate it from the Hystrichosphaeridea. cookson & Manum [1960] described the genus Crassosphaera with three new species, and discussed in their paper the question of the affinity of the genera Tytthodiscus Norem 1955 and Crassosphaera Cookson & Manum 1960. Besides specimens of Tytthodiscus Norem 1955, Venkatachala sc Baltes [1962] demonstrated microorganisms, belonging to the Crassosphaera genus. Simoncsics & Kedves [1961] proved Crassophaera concinna Cookson & Manum 1960 from the Hungarian Liassic. To mark off Crassosphaera from the Hystrichosphaeridae, they introduced the new taxon Crassosphaeridae. Góczán, E. Kriván-Hutter & Rákosi reported at the meeting of the Hungarian Geological Society, 14th June 1961, several Tytthodiscus Norem 1955 and Crassosphaera Cookson & Manum 1960 species. Crassosphaera stellulata Cookson & Manum 1960 had been observed in the Lower Eocene, Crassosphaera concinna Cookson & Manum 1960 in the Middle Oligocene strata. They reported also about the discovery of some new species. E. Nagy gave an (oral) information about having found in the course of her investigations on Oligocene material some specimens of Crassosphaera concinna Cookson & Manum 1960. 2* , 19