Bauer, J.E.; Waters, J.A.; Sumrall, C.D.
taxonomy · topology · range · morphology
No reusable Creative Commons license was verified for the article; the associated Dryad dataset is separately available as DOI 10.5061/dryad.rr48616 under CC0.
The supported blastoid record used here extends from the Sandbian Macurdablastus uniplicatus to a Wuchiapingian last occurrence near 255 Ma; a Permian–Triassic boundary endpoint would be an extinction inference rather than the observed last appearance.
claim:taxon:blastoidea:sandbian-wuchiapingian-recordMacurdablastus uniplicatus is treated in the cited revision as a blastoid outside Eublastoidea, providing a source-bounded class record rather than a claim about every blastoid relationship.
claim:taxon:blastoidea:taxonomyThe displayed blastoid evidence is restricted to named Sandbian and Wuchiapingian records in its source studies and does not establish a global distribution, origin centre or extinction geography.
claim:taxon:blastoidea:biogeographyThe cited systematic and hydrospire studies do not establish a class-wide diet, habitat preference, locomotor performance, body-size distribution or guild for Blastoidea; these fields remain unresolved.
claim:taxon:blastoidea:ecologyMacurdablastus is a named blastoid with source-described morphology, and hydrospire interpretation is retained as a source-bounded functional-morphology result rather than a class-wide invariant trait.
claim:taxon:blastoidea:morphology