Siliceous spicules from the basal-Cambrian Soltanieh Formation are the oldest reliable sponge remains under the cited candidate-by-candidate diagnostic reassessment.
claim:event:soltanieh-basal-cambrian-spiculesGiving the early fossil record of sponges a squeeze
Antcliffe, J.B.; Callow, R.H.T.; Brasier, M.D.
Year2014
Source roleprimary-study
DOI / ID10.1111/brv.12090
Fitness and scope
taxonomy · range · morphology · geochronology · methods
Reassesses twenty early sponge candidates and documents basal-Cambrian siliceous spicules from the Soltanieh Formation as the oldest reliable material in that analysis.
Claim ledger
Hexactinellida is displayed at 536–0 Ma only as a basal-Cambrian-spicule-to-living navigation anthology: the Soltanieh material is a cautious fossil anchor, not an exact crown-Hexactinellida FAD or continuous occupancy record.
claim:taxon:hexactinellida