Back Glassponse AF هيكساكتينليد ARZ Altışüalı süngərlər AZ Силициеви Bulgarian হেক্সাক্টিন্যালিড (এন্টার্ক্টিক গ্লাস স্পঞ্জ) Bengali/Bangla Hexactinèl·lides Catalan Hexactinellida CEB Křemité houby Czech Glasschwämme German Hexactinellid-sponguloj EO
| Glass sponges Temporal range: Late Ediacaran–present
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| "Hexactinellae" from Ernst Haeckel's Kunstformen der Natur, 1904 | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Hexactinellida Schmidt, 1870 |
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Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed siliceous spicules, often referred to as glass sponges. They are usually classified along with other sponges in the phylum Porifera, but some researchers consider them sufficiently distinct to deserve their own phylum, Symplasma. Some experts believe glass sponges are the longest-lived animals on earth;[2] these scientists tentatively estimate a maximum age of up to 15,000 years.
- ^ Brasier, Martin; Green, Owen; Shields, Graham (April 1997). "Ediacarian sponge spicule clusters from southwestern Mongolia and the origins of the Cambrian fauna" (PDF). Geology. 25 (4): 303–306. Bibcode:1997Geo....25..303B. doi:10.1130/0091-7613(1997)025<0303:ESSCFS>2.3.CO;2.
- ^ "Hexactinellid sponge (Scolymastra joubini) longevity, ageing, and life history". genomics.senescence.info. Retrieved 2 March 2023.