| Křemité houby (Hexactinellida)
Křemité houby (lat. Hexactinellida) mají tříosé (triaxonními) jehlice, tvořené opálem (ve fosilním záznamu oxidem křemičitým).
Autor: 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 | téka | | 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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