Comment on Ultrastructure reveals ancestral vertebrate pharyngeal skeleton in yunnanozoans

• 成果类型: Editorial Material
• 署名作者: Zhang, Xi-guang; Pratt, Brian R.
• 署名单位: Yunnan University; University of Saskatchewan
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11889
• DOI: 10.1126/science.adf1472
• 发表日期: 2023-07-28
• 关键词: shale; embryos; EVOLUTION

摘要

Tian et al. (Reports, 8 July 2022, p. 218) claim that Cambrian yunnanozoan animals are stem vertebrates, based partly on their observation at the nanometer scale of microfibrillar tissue located in the branchial arches. They interpret this to represent cellular cartilage with an extracellular matrix of microfibrils. Instead, we argue that the 'microfibrils' are more likely modern organic contamination.