Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 20. 2002. (Budapest, 2002)
Figure 2 — Slab with the right wing skeleton of Miodytes Serbiens n. gen & n. sp. Comparison — Comparison with some fossil and modern genera of Podicipediformes, Procellariformes and Charadriif ormes were done (see in the description). Description — As the bones can not be extracted from the slab without risk of damage, direct comparisons were possible only on the distal end of humerus and proximal part of carpometacarpus. On the humerus, sulcus musculi brachialis forms a deep depression, having an in versed V-shape (Figure 3: la). This appears only in Fulmarus and Oceanodroma genera of Procellariformes, and Gelocbelidon, Hydroprogne and Stercorarius (Laridae), Recurvirostra and Himantopus (Recurvirostridae) of Charadriiformes, but not as deep and long as in the Suseoke specimen. Fossa m. brachialis (Figure 3: lb) is round and deep. Epicondylus ventralis (Figure: 3: lc) is well developed. Contrary to Procellariformes and Charadriiformes, processus supracondylaris dorsalis is lacking. The shape of the forearm and the phalanx alae 1 digiti 2 is similar to grebes. First of all, ulna is arched that excludes Procellariformes. The shape of the proximal epiphysis of ulna and depressio musculi brachialis on the Figure 3 — Humerus (1). - a: sulcus musculi brachialis; b: fossa musculi brachialis; c: epicondylus ventralis. — Carpometacarpus (2). - a: edge between trochlea carpalis and the point of processus extensorius; b: edge of processus extensorius. — Phalanx alae (3). - a: apophysis of crista on the distal part. cranial face corresponds to grebes. Radius is not showing any indicative morphological feature. Concerning the carpometacarpus, the edge between trochlea carpalis and the point of processus extensorius is hollow (Figure 3: 2a). The edge of processus extensorius (Figure 3: 2b) of the carpometacarpus presents similarities with some Procellaridae and Laridae species, but it is much closer to Podicipedidae. The form of spatium intermetacarpalis and distal epiphysis and the height of synostosis metacarpahs distalis also refer to the grebes. The shape of phalanx alae 1 digiti 2 differs from Charadriiformes. Procellariformes phalanx has the same shape, but the apophysis of crista on the distal part (Figure 3: 3a) projects, contrary to the Suseoke specimen. Discussion The remains are in a slab and belong to the right wing of a bird. The bones are in anatomical connection. The total length of the humerus may be only estimated, because it lacks the proximal end. Among the phalanges only phalanx alae 1 digiti 2 and phalanx alae 2 digiti 2 are distinct, moved away from the carpometacarpus. For a detailed description of the bones see above. Regarding its sizes, the fossil wing skeleton belongs to a smaller specimen then the fossil Podicipedidae species (Table 1). By reason of the own measurements and bibliographical data, the ratio of the main bones of the wing also ranks among the fossil grebes. Considering the ratios of the humerus, ulna, carpometacarpus and phalanx alae 1 digiti 2, we calculated the next values: - the humerus/ulna proportion of Pterodroma, Procellaria, Frigadafons, Bulweria, Calonectis and Hydrobates is less then 1.00 (0.92-0.99). The same
