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Demospongea (Demospongeans)

      The representatives of the Class Demospongea are characteristic by spicules formed by SiO2 – monaxons and tetraxons.

Autor textu: Radek Vodrážka
Phymatella intumescens p4352
Phymatella p4313
Phymatella YA391
Phymatella tuberosa p4190
Phymatella tuberosa p4213
Phymatella tuberosa p2544
Phymatella tuberosa p2542
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]