Abstract: 'The outcrop at Milivojeviica Kamenjar in Druz'etic (Jadar Block, Vardar Zone, NW Serbia),
which exposes a fossiliferous limestone olistolith, is one of the key sites for Carboniferous
stratigraphy and paleogeography in the Balkan Peninsula.  Its age has been debated several times,
and re-examination of the succession was required.  Based on ammonoids and conodonts, an interval
spanning from the latest Devonian to the basal Serpukhovian is represented. From the early late
Visean portion of the section, the new ammonoid genus and species Ubites filipovici gen. nov. et sp.
nov. is described.  Entogonites tetragonus (Kullmann, 1962), a formerly misinterpreted
ammonoid species, is revised.