Hexactinellid
Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed silaceous spicules, often referred to as glass sponges. They are usually classified along with other sponges, but some researchers consider them sufficiently distinct to deserve their own phylum, Symplasma.
| Hexactinellid sponges Temporal range: Cambrian - Recent | |
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| "Hexactinellae" from Ernst Haeckel's Kunstformen der Natur, 1904 | |
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| Class: | Hexactinellida Schmidt, 1870 |
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Amphidiscophora | |
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