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-rangeNew insights into the Devonian sea spiders of the Hunsrück Slate
Sabroux, R.; Garwood, R.J.; Pisani, D.; Donoghue, P.C.J.; Edgecombe, G.D.
年份2024
来源角色primary-study
DOI / ID10.7717/peerj.17766
适用范围
taxonomy · range · 形态 · 拓扑
Table 1 classifies Cambropycnogon only as possibly Pycnogonida, requiring a contested total-group interpretation.