The discovery is a 'rare and important' find that raises new questions for evolution.
t, it was suggested that dinosaurs had a reproductive function that was similar to that of turtles and other reptiles. According to the release, this was in contrast to the segmented reproductive tract of crocodiles and birds with separate regions of membrane and shell deposition.
Although crocodiles have separate regions of shell membrane and mineralized shell deposition, like turtles and other reptiles, they ovulate and release all the eggs simultaneously, as opposed to the sequential ovulation of birds, which lay one egg at a time. “The finding of an ovum-in-ovo egg from a titanosaurid nest opens up the possibility that sauropod dinosaurs had an oviduct morphology similar to those of crocodiles or birds, and they may have adapted to a mode of the egg-laying characteristic of birds,” said DU researcher Dr. Harsha Dhiman, lead author of the paper.According to paleontologists, birds-like behavior has been observed in the fossil record of dinosaurs in the form of nest construction and evidence of parental care.
The eggs were found in the lower Narmada valley's sandy limestone/calcareous sandstone. During multiple field works conducted by the authors in the Bagh-Kukshi areas of the Dhar district, 108 titanosaur nests were identified, including intact clutches, isolated eggs, and several eggshell fragments. Pathologic eggs have been documented in the amniote eggs of birds, turtles, and dinosaurs.
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