| Glass sponges (Hexactinellida)
Glass sponges - class Hexactinellida are typical by tri-axial (triaxonn) spicules, composed of opal (in the fossil record by SiO2).
Author: Radek Vodrážka
| Craticularia angustata | | | | p4193 | | Craticularia beaumonti | | | | p4346 | | Craticularia bifrons | | | | p5423 | | Craticularia | | | | p4179 | | Craticularia subseriata | | | | p4169 | | Craticularia subseriata | | | | p4206 | | Craticularia vulgata | | | | p4043 | | Craticularia vulgata | | | | p4192 | | Cystispongia verrucosa | | | | p4311 | | Cystispongia verrucosa | | | | p4320 | | Cystispongia verrucosa | | | | p2541 | | Doryderma ramosa | | | | p4177 | | Exanthesis Regnard, 1925 | AD. Poukarová, H. & Bubík, M. (2012), Bc. práce(2012), Příloha č. 8, obr. 10 | | | HP31 | | Guettardia | | | | p3914 | | Guettardia trilobata | | | | p4057 | | Hexactinellida Schmidt, 1870 | | | | p4328 | | Hexactinellida Schmidt, 1870 | | | | JK5818 | | Hexactinellida Schmidt, 1870 | | | | p4294 | | Hexactinellida Schmidt, 1870 | | | | p4296 | | Hexactinellida Schmidt, 1870 | | | | p4323 |
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![[ENG]](img/vlajka-cr.gif)
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