Katherine A Turk, Mikaela A Pulsipher, Helke Mocke, Marc Laflamme, Simon A F Darroch
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引用次数: 0
摘要
Himatiichnus mangano igen. et isp. nov.是纳米比亚南部 Urusis Formation 埃迪卡拉晚期 Huns 成员中的一种新的痕量化石，它由相互缠绕的管子组成，表现出双重线纹模式，让人联想到现代和寒武纪早期的priapulid蠕虫洞穴。这些相似性支持了对芒果 H. 的全群蝶形虫追踪器的解释，从而为蝶形虫首次出现在埃迪卡拉晚期（约 539 Ma）提供了直接证据。因此，这一新材料表明在寒武纪边界以下存在全群鳞角类，并支持寒武纪大爆发的漫长前寒武纪引信的推断。
Himatiichnus mangano igen. et isp. nov., a scalidophoran trace fossil from the late Ediacaran of Namibia.
Himatiichnus mangano igen. et isp. nov., a new trace fossil from the late Ediacaran Huns Member of the Urusis Formation, southern Namibia, comprises intertwining tubes exhibiting dual lineation patterns and reminiscent of both modern and early Cambrian examples of priapulid worm burrows. These similarities support the interpretation of a total-group scalidophoran tracemaker for H. mangano, thus providing direct evidence for the first appearance date of Scalidophora in the late Ediacaran ca 539 Ma. This new material is thus indicative of the presence of total-group scalidophorans below the Cambrian boundary and supports inference of a lengthy Precambrian fuse for the Cambrian explosion.
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