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New frogs from the latest Cretaceous of Hateg Basin, Romania

100%

Venczel M., Csiki Z.

Acta Palaeontologica Polonica

2003

tom 48

nr 4

The latest Cretaceous (Maastrichtian) fluvio−lacustrine deposits of Haţeg Basin (Romania) have yielded a number of aquatic and terrestrial microvertebrates, including dissociated skeletal remains of the following anuran taxa: Hatzegobatrachus grigorescui gen. et sp. nov., Paralatonia transylvanica gen. et sp. nov., andAnura indet. H. grigorescui sp. nov. (type species), retaining some leiopelmatid−grade anuran features, is diagnosed as a small−sized primitive frog with still unclear relationships. P. transylvanica sp. nov. (type species) is a middle−sized discoglossine frog. Based on the characters of jaw−bones andpost−cranial skeletal elements, it appears as intermediate between primitive (Eodiscoglossus−like) andmore derived (Latonia−like) discoglossine discoglossid. In Hatzegobatrachus and Paralatonia the morphology of the hipbones shows that they differ in saltatorial abilities. Consequently, these forms may have occupied distinct ecological niches, suggesting that the latest Cretaceous microvertebrate assemblages of Haţeg Basin were connectedto more complex ecosystems than considered before.

Remarks on palaeoenvironmental changes based on reviewed Tertiary insect associations from the Krusne hory piedmont basin and the Ceske stredohori Mts in Northwestern Bohemia [Czech Republic]

100%

Prokop J.

Acta Zoologica Cracoviensia

2003

tom 46

nr Suppl.

Cenozoic insect fauna of northwestern Bohemia is preserved in fluviolacustrine deposits of the Krušné hory piedmont basins and the České středohoří Mts. The fossil insect assemblages are correlated with palaeobotanical results. The local palaeoenvironmental conditions such as the distance from the shoreline or water depth are interpreted. A reflection of changes in distribution of fossil entomofaunas is compared with relevant world localities of different palaeoenvironments. The sparse fossil insect taphocoenoses fill a gap in record of significant diverse non-marine invertebrate communities and serve for reconstruction of terrestrial palaeoecosystems. The selected fossil sites demonstrate insect taphocoenoses formed under conditions of the palaeoenvironment of a diatomaceous lake with subtropical forests (Kučlín), lowlands of riparian and mesophytic forests (Kundratice - Seifhennersdorf), warm-temperate swamp to riparian forests (Bílina mine) and lake sedimentation near mixed mesophytic forests (Mokřina). The aim is to compare fossil entomofaunas from several periods within Tertiary in northwestern Bohemia and search for analogous palaeoenvironmental conditions in other areas. The results are correlated with the previously proposed palaeobotanical models.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Acta Zoologica Cracoviensia

1 Csiki Z.

1 Prokop J.

1 Venczel M.

2 2003

Wyniki wyszukiwania

New frogs from the latest Cretaceous of Hateg Basin, Romania

Remarks on palaeoenvironmental changes based on reviewed Tertiary insect associations from the Krusne hory piedmont basin and the Ceske stredohori Mts in Northwestern Bohemia [Czech Republic]