Eastern Europe

Only one region in Eastern Europe has thus far yielded mammals of Late Cretaceous age, the Halieg Basin, Romania (figure 2.16, table 2.17). A useful account of the geologic setting and microvertebrate fauna in general is given by Grigorescu et al. (1999). As noted, Europe assumed the form of an archipelago during parts of the Late Cretaceous. Theropods known from Transylvania are generally small, and this seems to be true of other dinosaurs as well, suggesting that the region was, indeed, insular (Weisham-pel et al., 1991; Csiki and Grigorescu, 1998). Mammals are known from five sites in the Halieg Basin. Two are near Sinpetru (also called the Sibifel Valley) and are in the Sin-petru Formation. The locality of Dupa Rau (figure 2.16) has yielded an unidentified cimolodontan (Grigorescu, 1984; Grigorescu and Hahn, 1987). A partial skull is known from the nearby site of Tama§el. Kogaionon ungureanui, based on this specimen, is referred to its own family, Kogiaononidae, known only from Europe (Kielan-Jaworowska and Hurum, 2001, see chapter 8). Also in the Sinpetru Formation, the locality of Pui (figure 2.16), in the eastern part of the Halieg Basin, has yielded three multituberculate taxa (Grigorescu et al., 1985; Radulescu and Samson, 1986, 1997). The only named species is Barbatodon transylvanicum, which is a basal cimolodontan referred to the so-called Paracimexomys group (see chapter 8).

rr~n Upper Cretaceous —1— marine deposits deposits

Maastrichtian continental deposits

Crystalline basement figure 2.16. Late Cretaceous (Maastrichtian) mammal localities in the Hateg Basin, Romania. Localities: 1, Pui; 2, Dupa Râu; 3, Tamaçel (Sînpetru Formation); 4, Tuçtea; 5, Fântânele (Densus-Ciula Formation). Source: redrawn from an illustration provided by Z. Csiki.

deposits

Maastrichtian continental deposits rr~n Upper Cretaceous —1— marine deposits

Crystalline basement figure 2.16. Late Cretaceous (Maastrichtian) mammal localities in the Hateg Basin, Romania. Localities: 1, Pui; 2, Dupa Râu; 3, Tamaçel (Sînpetru Formation); 4, Tuçtea; 5, Fântânele (Densus-Ciula Formation). Source: redrawn from an illustration provided by Z. Csiki.

table 2.17. Late Cretaceous Mammals of Romania. Localities (all in the Hateg Basin, Romania; see figure 2.16; locality numbers do not correspond between map and table): 1, Dupa Rau; 2, Tamasel; 3, Pui (Sinpetru Formation, Maastrichtian); 4, Tustea; 5, Fantanele (Densus-Ciula Formation, Maastrichtian)

Multituberculata

Family incertae sedis

Barbatodon transylvanicum (3) Gen. et sp. indet. ("ptilodontoid") (3) Gen. et sp. indet. ("taeniolabidoid") (3)1 Gen. et sp. indet. (1,4, 5) Kogaionidae

Hainina sp. A (5) Hainina sp. B (5) Kogaionon ungureanui (2)

1 Occurrence of great significance if confirmed; presently considered highly dubious.

The remaining two sites are in the northwest part of the Hateg Basin (see Csiki and Grigorescu, 2000). They are both in the Densu^-Ciula Formation, which is believed to be a correlative of the Sinpetru Formation. A single incisor of an unidentified cimolodontan is known from the site of Tustea. The Fantanele locality, west of Tustea and near Valioara, has yielded three multituberculate taxa, two of which are referable to Hainina. This genus appears to be related to Kogaionon; its occurrence in the Densus-Ciula Formation is notable because Hainina is otherwise known from the Paleocene of Western Europe (Vianey-Liaud, 1979, 1986).

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