| Summary: | During recent years the author has studied a number of fossil bird-bone remains from palaeontological sites in theCarpathian Basin. Publication of the results of the studies, following the taxonomic order of the remains, is planned in threepapers. Podicipediformes to Galliformes and Tetraondidae form the subject of the first part. The second part will include theremains of Galliformes to the Charadriiformes, while the third part will concentrate on bird bones from Columbiformes toPasseriformes. In addition to the detailed description of new taxa, emphasis is placed on species that are already extinct.In this paper (Part I) the following new fossil species are described: Podiceps csarnotanus n. sp.; Heliadornis minorn. sp.; Egretta polgardiensis n. sp.; Clangula matraensis n. sp. and Mergus minor n. sp.While working on recently excavated materials, the author also revised the already published details on extinctspecies i.e. details which are the subject of controversial taxonomic positioning. Consequently, the species level ofCiconia stehlini JÁNOSSY, 1992; Anas albae JÁNOSSY, 1979; Falco tinnunculus atavus JÁNOSSY, 1972; Tetraopraeurogallus JÁNOSSY, 1969 and Tetrao (Lyrurus) partium KRETZOI, 1962 have been confirmed, while Anser subanserJÁNOSSY, 1983 and Anas submajor JÁNOSSY, 1979 — up until now ranked among the fossil species — have beenconsidered as subspecies.The published fauna list in this paper also includes the following recent taxa: Pelecanus sp., Ardea cinerea, Egrettasp. (E. alba size), Botaurus sp., Anser anser, Tadorna ferruginea, Anas clypeata, Anas crecca, Anassp. (A. querquedulasize), Anas sp. (A. strepera/A. penelope size), Aythya sp. (A. ferina size), Anatidae sp. indet., Gypaetos barbatus, Aquilaheliaca, Accipiter gentilis, Accipiter nisus, Accipiter sp. (A. nisus size), Buteo lagopus, Buteo sp., Circus sp., Pandionhaliaetus, Falco cf. cherrug, Falco sp. (F. peregrinus size), Tetrao urogallus and Galliformes sp. indet. dszertani sorrendben, három egymás után következő dolgozatban mutat be. ...
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