Naslov
Some remarks on Nummulites specimens from localities in south-eastern Slovenia and north-western Croatia

Autori
Ćosović, Vlasta ; Drobne, Katica

Izvornik
Annali del Museo Civico di Storia Naturale di Ferrara (1127-4476) 3 (2000); 14-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
Nummulites; axial sections; outer morphologies

Sažetak
The larger Foraminiferal faunas from the south-eastern Slovenia (Povlak, Šuštarica) and north-western Croatia (Višnjica and Ravna gora) are dominated by Nummulites specimens. The determination of Nummulites sp., in thin sections (mainly from their axial sections), is still rarely used. The five determined nummulitid species and subspecies, N. fabianii (Prever), N. fabianii retiatus Roveda, N.stellatus Roveda, N. incrassatus de la Harpe and N. sp. 1 (among them only N. fabianii occur at all localities) suggest Priabonian age (SBZ 19/20) of sediments. The extensive biometric analysis on equatorial section of megalospheric forms, resulted with reattribution of Roveda's (1970) N. fabianni retiatus into N. retiatus. The following parameters are used to distinguish axial section of megalospheric individuals: protoconch height, outer morphologies, diameter/thickness (d/t) ratio, presence or absence of alar prolongations and cetral pillars.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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