Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 21. 2003. (Budapest, 2003)

Figure 3 — Geographic extension and stratigraphie position of the Nummulites communities of the Lutetian Nummulites lorioli Zone. The percentages of genera are as follows: Nummulites 80, Assilina 15, Discocylina 5. The borehole Pénzesgyőr térképező 31. is located in the central part of the High Bakony. In the core taken from the interval 56.8—59.6 m (clay-marl), N. perforatus makes up 68 % of the community. Both the generic and the specific diversity are higher. Along with JV. perforatus the punctuate species are represented by JV. aturicus and N. meneghinii (2 % each). The group of reticulate Nummulites is considerable (13 %) and rather varied: N.puschi, N. sordensis, N. pen^esgyoerensis and N. praefabianii. Six rare species represent the striate Nummulites: N. variolarius, N. discorbinus, N. anomalus, N. -^ircensis, N. anomaloides and N. striatus. The two species of smooth Nummulites, N. millecaput and N. maximus combined make up 6 %. The generic composititon is: 87 % Nummulites, 13 % Discocyclina, 9 % Operculina. The Zirc Basin is represented by borehole Dudar 218. The 172.2—172.7 m interval is very rich in larger foraminifera (abundance index = 4), 83 % of which is a medium diversity Nummulites community. The dominant taxon is N. perforatus (58 %). The punctuate species are represented by N. meneghinii (2 %). Out of the reticulate Nummulites, JV. brongniarti has to be pointed out (10 %), while JV. sordensis is but a "colouring element" (2 %). The percentage of the striate Nummulites is relatively high: 20 %. Among these, JV. discorbinus makes up 8 % of the community, while JV. variolarius, N. anomalus and JV. sinensis 3 to 7 % each. The smooth Nummulites make their appearance: a few specimens of N. dufrenoyi could be identified. The predominant Nummulites (83 %) are accompanied in the community of larger foraminifera by Alveolines (11 %) and discocyclinids (6 %). The N. perforatus community of the Northeaster Bakony was studied on core 443.0—443.3 m of borehole Balinka 219. The friable limestone contained a suprisingly rich and varied Nummulites fauna (abundance index = 4). Its dominant species is N. perforatus, with 65 %. The reticulate Nummulites (JV. praegarnieri, N. garniert, N. stun) are rather accessor)- elements (8 %). On the contrary, the striate Nummulites excel with a richer and more varied fauna as compared to the previously described communities. Their 8 taxa (JV. variolarius, N. discorbinus, JV. anomalus, N. striatus, N. carpenteri, N. anomaloides, N. kopeki, N. subtilis maior) make up 22 % of the community. N. variolarius has the highest percentage (8), the others range from 1 to 4 %. A forerunner of the smooth Nummulites, N. millecaput is present also here (a few specimens). The generic composition is the following: Nummulites 90 %, discocyclinids 8 %, Alveolina 2 %. Comparing the four profiles it can be stated that the diversity of Nummulites communities is low to medium, increasing from the West towards the East being the highest in the High Bakony and the NE Bakony areas. The dominating species of the communities is N perforatus. In the Sv. 1. sample it constitutes an almost monospecific fauna (88 %). Eastwards its predominance is somewhat decreasing (down to 60 %), and a considerable number of reticulate and striate species are associated to it. Particularly common associates are the small-size Nummulites, such as JV. variolarius, N. discorbinus and N. anomalus, which are constant community members. It has to be pointed out that in these communities, most of the species are new for Hungary or for science (JV. pen^esgyoerensis, N. ^rcensis, N. anomaloides, N kopeki, N. meneghinii, N. sordensis, N. praefabianii, N. praegarnieri, N. garniert' sturi, N. carpenteri,