Applied to echinoderms that are attached to the substratum (e.g. primitive Crinoidea). The term is used informally, and in some classifications Pelmatozoa is ranked as a subphylum of the Echinodermata. Compare eleutherozoan.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。