The authors would like to state that the three specimen numbers used in the original paper have already been occupied and each should be replaced with the following numbers: “AMNH Bu-SY16” in Section 3. Systematic palaeontology on page 1154 and Figs. 2 and 3 on page 1155 (used in Jałoszyński et al. Reference Jałoszyński, Yamamoto and Takahashi2017) should be replaced with “AMNH Bu-SY24”; “AMNH Bu-SY17” in Section 3. Systematic palaeontology on page 1156, Fig. 4 on page 1157 and Fig. 5 on page 1158 (used in Jałoszyński et al., Reference Jałoszyński, Brunke, Yamamoto and Takahashi2018) should be replaced with “AMNH Bu-SY25”; and “AMNH Bu-SY18” in Section 3. Systematic palaeontology on page 1159 and Fig. 6 on page 1160 (used in Jałoszyński et al., Reference Jałoszyński, Brunke, Yamamoto and Takahashi2018) should be replaced with “AMNH Bu-SY26”.
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