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- W4382241946 abstract "The ontogenetic status of the known specimens of alvarezsaurid theropod dinosaurs is revised. We present histological data that the holotype of Parvicursor remotus from the Upper Cretaceous Barungoyot Formation of Mongolia is not an adult individual, as previously thought, but a juvenile less than one year old. The miniaturization took place only in the Late Cretaceous Asiatic Parvicursorinae, whereas the Late Cretaceous South American non-parvicursorine alvarezsaurids were large animals. The miniaturization occurred by shifting ossification to earlier ontogenetic stages, in particular, by the closure of the neurocentral sutures on the presacral vertebrae of juvenile animals. There is no morphological support for the myrmecophagy in the alvarezsaurids and a shift to a myrmecophagous ecological niche does not explain the need for miniaturization." @default.
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- W4382241946 date "2023-06-27" @default.
- W4382241946 modified "2023-09-23" @default.
- W4382241946 title "Ontogeny and miniaturization of Alvarezsauridae (Dinosauria, Theropoda)" @default.
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- W4382241946 doi "https://doi.org/10.21638/spbu03.2023.201" @default.
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