Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2009129117 |
Three-dimensional reconstructions of the putative metazoan Namapoikia show that it was a microbial construction | |
Akshay Mehra; Wesley A. Watters; John P. Grotzinger; Adam C. Maloof | |
2020-08-03 | |
发表期刊 | Proceedings of the National Academy of Science
![]() |
出版年 | 2020 |
英文摘要 | Strata from the Ediacaran Period (635 million to 538 million years ago [Ma]) contain several examples of enigmatic, putative shell-building metazoan fossils. These fossils may provide insight into the evolution and environmental impact of biomineralization on Earth, especially if their biological affinities and modern analogs can be identified. Recently, apparent morphological similarities with extant coralline demosponges have been used to assign a poriferan affinity to Namapoikia rietoogensis, a modular encrusting construction that is found growing between (and on) microbial buildups in Namibia. Here, we present three-dimensional reconstructions of Namapoikia that we use to assess the organism’s proposed affinity. Our morphological analyses, which comprise quantitative measurements of thickness, spacing, and connectivity, reveal that Namapoikia produced approximately millimeter-thick meandering and branching/merging sheets. We evaluate this reconstructed morphology in the context of poriferan biology and determine that Namapoikia likely is not a sponge-grade organism. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/287919 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Akshay Mehra,Wesley A. Watters,John P. Grotzinger,et al. Three-dimensional reconstructions of the putative metazoan Namapoikia show that it was a microbial construction[J]. Proceedings of the National Academy of Science,2020. |
APA | Akshay Mehra,Wesley A. Watters,John P. Grotzinger,&Adam C. Maloof.(2020).Three-dimensional reconstructions of the putative metazoan Namapoikia show that it was a microbial construction.Proceedings of the National Academy of Science. |
MLA | Akshay Mehra,et al."Three-dimensional reconstructions of the putative metazoan Namapoikia show that it was a microbial construction".Proceedings of the National Academy of Science (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论