Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 20. 2002. (Budapest, 2002)

4 DlMITRIJEVICH, V. Smithsonian Institution. RGF: Fossil bone collection in the Institute of Regional Geology and Palaeontology Comparative material available — Recent bones of the wing (humeri, ulnae, radii and carpometacarpi and phalanges alae 1 digiti 2) of the next taxa were studied: 1 — PocUcipediformes: Aechmophorus occidentalis (LAWRENCE), 1858 [male: USNM 560546, 560548, 561115, 561116; female: USNM 560550, 561113, 561117], Aechmophorus clarkii (LAWRENCE), 1858 [male: USNM 560534, 560535; female: USNM 560531, 560537], Podiceps cnstatus (LINNAEUS), 1758 [UBB], Podiceps auritus (LINNAEUS), 1758 [BBU], Podiceps nigricollis BREHM, 1831 [BBU], Podiceps griseigena (BODDAERT), 1783 [BBU], Tachybaptus ruficollis (PALLAS), 1764 [BBU]. 2 — Procellariformes: Fulmarus glaciális (LINNAEUS), 1761 [IPH 1154, MTM 561172, UCBL], Daption capense (LINNAEUS), 1758 [LAC 1997-134], Pagodroma nivea (FORSTER), 1777 [LAC 1997-1141], Pterodroma nigripennis (ROTHSCHILD), 1893 [MTM 614813], Pterodroma phaeopygia (SALVEN), 1876 [LAC 1997-148], Pterodroma baraui (JOUANIN), 1964 [UCBL], Pterodroma macroptera (SMITH), 1840 [LAC 1997-144], Pacbyptila vittata (FORSTER), 1777 [LAC 1997-140], Pacbyptila desolata (GMELIN), 1789 [LAC 1997-813], Bulweria sp. GÁL,E. & KESSLER, E. [LPH 1073], Procellaria cinerea GMELIN, 1789 [LAC 1910299, MTM 33516, 502128], Calonectis diomedea SCOPOLI, 1769 [LPH 1035, LAC 1992-24, BBU, UCBL], Pufmus pacificus (GMELIN), 1789 [USNM 289180, UCBL], Puffinus gravis (O'REILLY), 1818 [LPH 1419], Puffinus gnseus (GMELIN), 1789 [LPH 1418, UCBL], Puffinus puffinus (BRÜNNICH), 1764 [LPH 1152, MTM 556056, UCBL], Puffinus Iherminien LESSON, 1839 [UCBL], Oceamtes oceanicus KUHL, 1820 [LPH 581], Hydrobates pelagicus (LINNAEUS), 1758 [LPH 1252], Oceanodroma leucorhoa (VlELLLOT), 1817 [LPH 1268, USNM 428056, UCBL], Pelecanoides urinatrix (GMELIN), 1789 [LAC 1997-127, USNM 18771], Pnofinus sp. [LPH 1352]. 3 — Charadriiformes: Stercorarius pomarinus (TEMMINCK), 1815 [USMN 620722], Stercorarius longicaudus VIEILLOT, 1819 [USNM 491644], Stercorarius parasiticus (LlNNAEUS), 1758 [USNM 13648], Stercorarius maccormicki SAUNDERS, 1893 [USNM 488321], Sterna caspia PALLAS, 1770 [USNM 501244], Gebdxlidon miotica GMELIN, 1789 [USNM 289676} Recurvirostraavosetta LlNNAEUS, 1758 [USNM 610452]. Anatomical terminology follows BAUMEL et al. (1979), GILBERT et al. (1981) and BOCHENSKI (1994). Measurements were taken with mechanical and digital callipers to 0.1 mm and 0.01 mm, respectively. Systematics Order: Podicipediformes FÜRBRINGER, 1888 Family: Podicipedidae BONAPARTE, 1831 Genus Miodytes n. gen. Type species — Miodytes serbicus, new species. Included species — type species only. Type locality — Bela Stena, Suseoke village, Valjevo Basin, west Serbia. Type stratum — "Bela Stena series", Early Miocene Name derivation — Miocene and Dytes, from the Greek SmtKOtn (diving). Diagnosis — as for the holotype. Miodytes serbicus n. sp. (Figure 2-3) Type locality — Bela Stena, Suseoke village, Valjevo Basin, west Serbia. Holotype — A slab with an almost complete right wing skeleton (RGF 97/3): distal fragment of humerus, ulna, radius, carpometacarpus and phalanx alae 1 digiti 2 (Figure 2). Name derivation — The species name was derived after Serbia, the country where the fossil material was found. Diagnosis — Small grebe, morphologically and dimensionally differing from all the known recent and fossil species. On the humerus, sulcus musculi brachialis is very deep and long, epicondylus ventralis is well developed and processus supracondylaris dorsalis is lacking. The edge between trochlea carpalis and the point of processus extensorius is hollow on the carpometacarpus. Measurements — (in mm): humerus, width of diaphysis above the distal epiphysis: 4.60, width of the distal epiphysis: 7.31; ulna: total length: 56.27, estimated length of the proximal epiphysis: 6.80, width of the diaphysis: 3.05, thickness of the distal epiphysis: 4.70; radius: total length: 53.42, width of the diaphysis: 2.73, thickness of the distal epiphysis: 2.72; carpometacarpus: total length: 26.52, width of the proximal epiphysis: 5.70, length of the processus metacarpi I: 3.38, width in the middle of the bone: 3.32, width of the distal epiphysis: 4.04; phalanx alae 1 digiti 2: total length: 12.19; phalanx alae 2 digiti 2: total length: 8.02.