Bristle Scale As a Predecessor of Protofeather and Feather
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The bristle scale is a skin appendage recognized in the ornithiscian dinosaurs Daurosaurus olovus and Kulindapteryx ukureica from the Kulinda locality (Transbaikalia, Russia). Morphologically, the bristle scale is a horn plate immersed in the dermis, with strands (bristles) diverging from its external edge. It is assumed that the filamentous protofeather of dinosaurs is the monobristle variant of the bristle scale and avian feather results from its tubular spatial modification. The bristle scale is considered to be intermediate between the reptilian scale and avian feather.
Keywords:scales protofeather feather dinosaurs birds evolution
This study was supported by the Russian Foundation for Basic Research, project no. 16-05-00408.
- 1.Alifanov, V.R., Infraorder Alvarezsauria, in Iskopaemye pozvonochnye Rossii i sopredel’nykh stran. Iskopaemye reptilii i ptitsy. Chast’ 2 (Fossil Vertebrates of Russia and Adjacent Countries: Fossil Reptiles and Birds: Part 2), Kurochkin, E.N. and Lopatin, A.V., Eds., Moscow: Geos, 2012, pp. 325–334.Google Scholar
- 2.Alifanov, V.R. and Saveliev, S.V., Two new ornithischian dinosaurs (Hypsilophodontia, Ornithopoda) from the Late Jurassic of Russia, Paleontol. Zh., 2014, no. 4, pp. 72–82.Google Scholar
- 3.Alifanov, V.R. and Saveliev, S.V., Jurassic dinosaurs of Transbaikalia, Priroda, 2016a, no. 4, pp. 35–44.Google Scholar
- 4.Alifanov, V.R. and Saveliev, S.V., Jurassic dinosaurs of Transbaikalia, Priroda, 2016b, no. 5, pp. 39–48.Google Scholar
- 5.Alifanov, V.R., Saveliev, S.V., Tereshchenko, E.Yu., et al., Integument structure in ornithischian dinosaurs (Hypsilophodontia, Ornithopoda) from the Late Jurassic of Transbaikalia, Paleontol. Zh., 2014, no. 5, pp. 72–80.Google Scholar
- 7.Brush, A.H., Evolving a protofeather and feather diversity, Am. Zool., 2000, vol. 40, pp. 631–639.Google Scholar
- 8.Brush, A.H., The beginnings of feathers, in New Perspectives on the Origin and Early Evolution of Birds, Gauthier, J. and Gall, L.F., Eds., New Haven: Yale Univ. Press, 2001, pp. 171–179.Google Scholar
- 9.Chen, P., Dong, Z., and Zhen, S., An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China, Nature, 1998, vol. 391, no. 6663 P, pp. 147–152.Google Scholar
- 14.Saveliev, S.V. and Alifanov, V.R., A new type of skin derivatives in ornithiscian dinosaurs from the Late Jurassic of Transbaikalia, Dokl. Ross. Akad. Nauk, 2014, vol. 456, no. 2, pp. 251–253.Google Scholar
- 15.Saveliev, S.V. and Alifanov, V.R., Integumentary appendages in Late Jurassic ornithiscian dinosaurs from Transbaikalia and the problem of the origin to feather, Vest. St. Peterb. Gos. Univ. Ser. 3 Biol., 2016, vol. 3, pp. 130–134.Google Scholar