Fig. 7 in First record of chambered hexactinellid sponges from the Palaeozoic

Fig. 7. Three-armed branched individual of chambered hexactinellid sponge Casearia devonica sp. nov., BSPG 2012 I 47a (paratype) from the Lower Emsian at Colle, Cantabrian Mountains, NW Spain. Central branch exhibiting almost longitudinal section with chambers gradually increasing in size from base to top, and axial spongocoel. Irregular gastral surface within spongocoel, showing possible openings of exhalant canals (arrows). Sponge encrusted by fistuliporid bryozoans, at least some of which colonized surface of sponge post mortem, see, e.g., bryozoan fully overgrowing the osculum.