With Chondrites, an ichnoguild of many-branched, radial, trace fossils probably made by a worm that moved back and forth through the sediment, each branch of its burrow exploring a new area. They are believed to be fodinichnia.
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。