A new species of Hallucigenia from the Cambrian Stage 4 Wulongqing Formation of Yunnan (South China) and the structure of sclerites in lobopodians
A new species of Hallucigenia from the Cambrian Stage 4 Wulongqing Formation of Yunnan (South China) and the structure of sclerites in lobopodians
复制标题
云南寒武纪四期五龙庆组迷幻植物一新种及叶足类骨片结构
DOI：
10.3140/bull.geosci.1280
复制
发表时间：
2012-01-01
影响因子：
1.9
通讯作者：
Keupp, Helmut
中科院分区：
文献类型：
--
作者：
Steiner, Michael;Hu, Shixue;Keupp, Helmut
描述了采自云南省昆明市广威地区寒武系五龙箐组关山四期化石Lagerstatte中的Hallucigenia hongmeia sp. nov.和Hallucigenia sparsa。叶足类的成对的躯干骨片显示出一种一般的网状显微结构，这是记录的属Hallucigenia。Onychodictyon和Microdictyon。这种显微结构是一个类似的显微结构在palaeoscolecidan广义Cricocosmia和Tabelliscolex的成对的树干骨片。叶足动物的网状躯干Scierites被解释为具有许多感觉或分泌乳头。Lobopodian骨片，例如Hallucigenia、Onychodictyon和Microdictvon以及palaeoscolecidans s.1。Cricocosmia和Tabellicsolex主要由晒黑的有机结构组成。在小网藻属和环藻属中，树干骨片的重复表明外部角质层的蜕皮。Hallucigenia hongmeia sp. nov.的爪的结构和形状被解释为一个适应的生活方式在底栖动物的指示。
Hallucigenia hongmeia sp. nov. and Hallucigenia sparsa are described from the Cambrian Stage 4 Guanshan fossil Lagerstatte of Wulongqing Formation from Guangwei in Kunming district, Yunnan Province, South China. The paired trunk sclerites of lobopodians reveal a general net-like microstructure, which is documented for the genera Hallucigenia. Onychodictyon and Microdictyon. This microstructure is comparable to a similar microstructure in paired trunk sclerites of the palaeoscolecidan sensu lato Cricocosmia and Tabelliscolex. The net-like trunk scierites of lobopodians are interpreted as having carried numerous sensory or secretory papillae. Lobopodian sclerites such as Hallucigenia, Onychodictyon and Microdictvon and the palaeoscolecidans s.1. Cricocosmia and Tabellicsolex were primarily composed of tanned organic structures. Duplicates of trunk sclerites in Microdictyon and Cricocosmia point to a moulting of the external cuticle. The structure and form of prominent claws in Hallucigenia hongmeia sp. nov. are interpreted as indicative of an adapted lifestyle in the epibenthos.