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Monophyletic taxon: Class Hexactinellida Schmidt, 1870 - hexactinellids (sponge)
 Entity: 

Basic information

Period : Early Cambrian - Present (541 Ma - present)
Status : extant

Paleontology

Period : Ediacaran - Present Ref: 1997: 23/11/2004.
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Last updated: 1 Feb 2024