Time will tell. This is really exciting stuff.
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For previous TetZoo articles relevant to this one, see…
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Daza, J. D., Bauer, A. M., Stanley, E. L., Bolet, A., Dickson, B. & Losos, J. B. 2018. An enigmatic miniaturized and attenuate whole lizard from the mid-Cretaceous amber of Myanmar. Breviora 563, 1-18.
Daza, J. D., Stanley, E. L., Wagner, P., Bauer, A. M. & Grimaldi, D. A. 2016. Mid-Cretaceous amber fossils illuminate the past diversity of tropical lizards. Science Advances 2 (3), e1501080.
Lee, M. S. Y., Cau, A., Naish, D. & Dyke, G. J. 2014. Sustained miniaturization and anatomical innovation in the dinosaurian ancestors of birds. Science 345, 562-565.
Wang, M. & Zhou, Z. 2017. The evolution of birds with implications from new fossil evidences. In Maina, J. N. (ed) The Biology of the Avian Respiratory System. Springer International Publishing, pp. 1-26.
Xing, L., McKellar, R. C., O’Connor, J. K., Bai, M., Tseng, K. & Chiappe, L. M. 2019. A fully feathered enantiornithine foot and wing fragment preserved in mid-Cretaceous Burmese amber. Scientific Reports 9, 927.
Xing, L., McKellar, R. C., Wang, M., Bai, M., O’Connor, J. K., Benton, M. J., Zhang, J., Wang, Y., Tseng, K., Lockley, M. G., Li, G., Zhang, Z. & Xu, X. 2016a. Mummified precocial bird wings in mid-Cretaceous Burmese amber. Nature Communications 7, 12089.
Xing, L., McKellar, R. C., Xu, X., Li, G., Bai, M., Scott Persons IV, W., Miyashita, T., Benton, M. J., Zhang. J., Wolfe, A. P., Yi, Q., Tseng, K., Ran, H. & Currie, P. J. 2016b. A feathered dinosaur tail with primitive plumage trapped in mid-Cretaceous amber. Current Biology 26, 3352-3360.
Xing, L., O’Connor, J. K., McKellar, R. C., Chiappe, L. M., Bai, M., Tseng, K., Zhang, J., Yang, H., Fang, J. & Li, G. 2018. A flattened enantiornithine in mid-Cretaceous Burmese amber: morphology and preservation. Science Bulletin 63, 235-243.
Xing, L., O’Connor, J. K., McKellar, R. C., Chiappe, L. M., Tseng, K., Li, G. & Bai, M. 2017. A mid-Cretaceous enantiornithine (Aves) hatchling preserved in Burmese amber with unusual plumage. Gondwana Research 49, 264-277.
Xing, L., O’Connor, J. K., Schmitz, L., Chiappe, L. M. McKellar, R. C., Yi, Q. & Li, G. 2020. Hummingbird-sized dinosaur from the Cretaceous period of Myanmar. Nature 579, 245-249.