Schmitz and Motani measured the inner and outer dimensions of this ring, plus the size of the eye socket, in 33 fossils of dinosaurs, ancestral birds and pterosaurs.
斯切米茨和藻谷测量了33具恐龙、始祖鸟和翼龙化石的巩膜环内围和外围及眼眶大小。
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