![](http://www.alamy.com/thumbs/6/7577371C-12D0-4491-829F-12DE54B57909/DTF7TP.jpg)
Hydnoceras tuberosum, fossil glass sponge
A vase-shaped, fossil glass (silaceous skeleton) sponge from the Devonian of New York.
Size: 3620px × 5227px
Photo credit: © Natural History Museum, London / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: animal, devonian, fortey, fossil, fossilised, fossils, glass, hexactinellid, hexactinellida, hydnoceras, invertebrata, invertebrate, key, marine, paleozoic, phanerozoic, porifera, prehistoric, prehistory, reticulosa, richard, silaceous, sponge, tuberosum