Fig. 2 in Revisiting Sabath's "Larger Avian Eggs" from the Gobi Cretaceous

Fig. 2. Plots of diameter vs. length (A) and elongation index (EI) vs. length (B) for the three forms originally included in the oogenus Gobioolithus, showing good separation between the three varieties. Gobioolithus minor and Styloolithus sabathi oogen. et oosp. nov. data comes from ZPAL specimens, the data for G. major from PIN specimens. Much of the variation in EI appears to represent variability in the distortion of eggs, with some foreshortened along their long axis, whereas others exhibit modified diameters.