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By Szives O., Csontos L., Bujtor L., Fözy I.

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Html, model after SCHETTINO & SCOTESE 2000. ” (OWEN 1996b). This global connection of main marine environments caused that ammonite faunas, at least in generic level were more or less cosmopolitan from the westernmost end of the former Tethys to the shores of Eastern Africa, of course with additional occurences of endemic taxa. This is unique during the Cretaceous period which can be characterized with extreme faunal provincialism. In the marine environments of the western Tethys two main palaeobiogeographic subprovinces can be recognized (MUTTERLOSE 1992, OWEN 1988, 1996b) during the Aptian: Boreal (North Temperate) and Mediterranean, but distinction between their ammonite record is not so clear than later in the Albian.

This idea relies on the fact that no older forms could be found in the basal sediment (FÜLÖP 1976) but ignores for instance the stromatolite cover of the hardground that indicates submarine environment at least for a period of time. SZIVES (1996, 1999a, 2002) concluded that the Tithonian hardground was flooded in the late Early Aptian. During Aptian – Early Albian times the sedimentation was very slow but continuous, sometimes intermittent for short periods, that resulted in a heavily condensed assemblage of ammonoids of a various state of preservation.

A new Tonohamites species is also found here (SZIVES & MONKS 2002). The subordo-level percentage disText-Figure 28. Generic distribution of the coltribution shows (Text-Figure 29) the high dominance of the Ancyloceratina lected specimens at Eperkés Hill section but it is surely due to the limited specimen number. The age of the ammonite fauna is determined as Uppermost Aptian (sensu KENNEDY et al. 2000) because of the appearance of Hamites, Tonohamites and Protanisoceras. The state of preservation is excellent; most of the specimens are internal moulds with fragments of the original, calcitized shell.

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