文章报道了产自云南寒武系第三阶小石坝生物群的小西德尼虫新种(Sidneyia minor sp.nov.),为西德尼虫属(Sidneyia)目前所发现的最古老物种.该新种具有其他已知小西德尼虫的一些典型特征,如新月形的头甲两侧后部具眼窝(notches),柄眼从...文章报道了产自云南寒武系第三阶小石坝生物群的小西德尼虫新种(Sidneyia minor sp.nov.),为西德尼虫属(Sidneyia)目前所发现的最古老物种.该新种具有其他已知小西德尼虫的一些典型特征,如新月形的头甲两侧后部具眼窝(notches),柄眼从眼窝处伸出,此外,最重要而且从未知晓的是显微-CT检测显示的头甲下3对触角后头部附肢.文章基于小西德尼虫新种和模式种的特征以及谱系分析结果,确认西德尼虫类与其他的异尾虫类(vicissicaudatans)构成姊妹群,归属物种显著分异的类肢动物(Artiopoda).展开更多
We report the extraordinarily preserved euarthropod Sidneyia minor sp.nov.from the Cambrian Stage 3 Xiaoshiba Lagerst?tte in Yunnan,South China.So far this is the earliest occurrence of the genus.As with other species...We report the extraordinarily preserved euarthropod Sidneyia minor sp.nov.from the Cambrian Stage 3 Xiaoshiba Lagerst?tte in Yunnan,South China.So far this is the earliest occurrence of the genus.As with other species of Sidneyia,the new taxon shares similar features such as a crescent-shaped head shield with paired lateral notches for stalked eyes,but more significantly and new,is the presence of three pairs of post-antennal appendages beneath the head shield identified by micro-CT methods.We conclude that Sidneyia is a sister group to other members of Vicissicaudata within the diverse radiation of Artiopoda.展开更多
文摘文章报道了产自云南寒武系第三阶小石坝生物群的小西德尼虫新种(Sidneyia minor sp.nov.),为西德尼虫属(Sidneyia)目前所发现的最古老物种.该新种具有其他已知小西德尼虫的一些典型特征,如新月形的头甲两侧后部具眼窝(notches),柄眼从眼窝处伸出,此外,最重要而且从未知晓的是显微-CT检测显示的头甲下3对触角后头部附肢.文章基于小西德尼虫新种和模式种的特征以及谱系分析结果,确认西德尼虫类与其他的异尾虫类(vicissicaudatans)构成姊妹群,归属物种显著分异的类肢动物(Artiopoda).
基金supported by the National Natural Science Foundation of China (Grant Nos. 41730318, 42162002 and 42202003)the Innovative Research Fund of Yuxi Normal University (Grant No. 202111390020)。
文摘We report the extraordinarily preserved euarthropod Sidneyia minor sp.nov.from the Cambrian Stage 3 Xiaoshiba Lagerst?tte in Yunnan,South China.So far this is the earliest occurrence of the genus.As with other species of Sidneyia,the new taxon shares similar features such as a crescent-shaped head shield with paired lateral notches for stalked eyes,but more significantly and new,is the presence of three pairs of post-antennal appendages beneath the head shield identified by micro-CT methods.We conclude that Sidneyia is a sister group to other members of Vicissicaudata within the diverse radiation of Artiopoda.
