Plumulaceous (downy) regions of a contour feather. Basal plumulaceous

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Downy feather fossils from the Lower Cretaceous of the Jiuquan Basin, Gansu Province, Northwest China - ScienceDirect

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Invertebrate remains in Madagascar pochard faeces. The x-axis

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Diagrammatic representation of key features of contour feathers.

Plumulaceous (downy) regions of a contour feather. Basal plumulaceous