| Demospongea (Demospongeans)
The representatives of the Class Demospongea are characteristic by spicules formed by SiO2 – monaxons and tetraxons.
Autor textu: Radek Vodrážka
| Astrobolia acuta | | | | p4189 | | Astrobolia acuta | | | | p4344 | | Astrobolia plauensis | | | | p5422 | | Astrobolia plauensis | | | | p3921 | | Astrobolia venusta | | | | p3946 | | Chonella crassa | | | | p3955 | | Chonella patella | | | | p3911 | | Chonella patella | | | | p4207 | | Chonella | | | | p3952 | | Demospongea Sollas, 1875 | | | | p3902 | | Maeandrospongia cavernosa | | | | p2479 | | Phymatella elongata | | | | p2546 | | Phymatella elongata | | | | p2488 | | Phymatella intumescens | | | | p4212 | | Phymatella intumescens | | | | p4333 | | Phymatella intumescens | | | | p4324 | | Phymatella intumescens | | | | p4214 | | Phymatella intumescens | | | | p2543 | | Phymatella intumescens | | | | p4197 | | Phymatella intumescens | | | | p4155 |
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Virtual museum of the Czech Geological Survey, cgs.gov.cz, (C) Czech Geological Survey, 2011, v.1.01 [29.09.2025]
![[ENG]](img/vlajka-cr.gif)
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