TABLE 1. Measurements (in millimeters) of Winnicavis gorskii gen. et sp. nov., holotype, specimen ISEA AF/WIN2a+b from Winnica, Poland, early Oligocene compared with those of all Oligocene passerine and zygodactylid birds. Abbreviations: cmc - carpometacarpus, hum - humerus. Letters in superscript indicate publications that were checked for measurements. a - Bochenski et al. (2011); b - Bochenski et al. (2013); c - Mayr and Manegold (2004); d - Mayr and Manegold (2006a); e - Weidig (2010); f - Mayr (1998). Asterisk (*) indicates arithmetic mean of left and right bone.
| Species | Number | hum | ulna | cmc | hum/ulna | hum/cmc |
| Winnicavis gorskii gen. et sp. nov. | ISEA AF/WIN2a+b | 18.6 | 24.0* | 9.4 | 0.78 | 1.98 |
| Jamna szybiaki a | MSMD Av JAM-6 | 17.2* | 18.5* | 9.4* | 0.93 | 1.83 |
| Resoviaornis jamrozi b | MSMD Av WR-9a+b | 12.4* | 17.0 | 8.0 | 0.73 | 1.55 |
| Wieslochia weissi c,d | SMF Av 497 | 18.1 | - | 13.2 | - | 1.37 |
| Wieslochia weissi d | SMNK-PAL 3980 | 17.7 | 23.8 | 13.4 | 0.74 | 1.32 |
| Eozygodactylus americanus e | USNM 299821 | 16.8 | 19.0 | 8.8 | 0.88 | 1.91 |
| Eozygodactylus americanus e | WDC-CGR-014 | 17.2 | 18.2 | 8.8 | 0.95 | 1.95 |
| Primozygodactylus danielsi f | SMF-ME 2522 (holotype) | 16.5 | 18.3 | 8.2 | 0.90 | 2.01 |
| Primozygodactylus major f | SMF-ME 1758 | 28.4 | 31.1 | 12.0 | 0.91 | 2.37 |
| Primozygodactylus ballmanni f | SMF-ME 2108 | 21.0 | 22.9 | 9.0 | 0.92 | 2.33 |
| Primozygodactylus ballmanni f | HLMD-Me 15396 | 20.0 | 20.9 | 9.1 | 0.96 | 2.20 |
