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Há 11 horas · A member of Galeaspida belonging to the family Xiushuiaspidae; a replacement name for Xiyuaspis Liu et al. (2019). Shan et al. (2023) also named a new species X. lixiensis from the Telychian Qingshui Formation (Jiangxi, China). A lamprey. The type species is Y. occisor; genus also includes Y. ingensdentes .
