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The analysis is based on an updated matrix of Tschopp, Mateus & Benson (2015), transformed to a species-level analysis. Galeamopus pabsti sp. n. is recovered within Diplodocinae, as sister taxon to Galeamopus hayi. Note that the position of Amphicoelias altus among the species of Brontosaurus is dubious (see text).
