500–0 Ma 的海蜘蛛显示是有争议的总群化石至现生导航包络，因为 Cambropycnogon 仅可能属于海蜘蛛，并非可靠的冠群首现。
claim:taxon:pycnogonida:fossil-range图谱首页 / 参考文献 / A Larval Sea Spider from the Upper Cambrian Orsten of Sweden, and the Phylogenetic Position of Pycnogonids
参考文献 / paperA Larval Sea Spider from the Upper Cambrian Orsten of Sweden, and the Phylogenetic Position of Pycnogonids
Waloszek, D.; Dunlop, J.A.
年份2002
来源角色primary-study
DOI / ID10.1111/1475-4983.00244
适用范围
taxonomy · range · 形态 · 拓扑
Primary study proposes Cambropycnogon as the oldest pycnogonid/chelicerate record; subsequent review leaves its assignment uncertain.