Fig. 3 in An enigmatic, possibly chemosymbiotic, hexactinellid sponge from the early Cambrian of South China

Fig. 3. Interpretative reconstruction of hexactinellid−like sponge Decumbispongia yuani gen. et sp. nov. Internal structure is hypothetical and illustrates a possible canal structure allowing ventilation of interior from convex outer surface (see text for discussion), with exhalent canals on concave, inner surface. Internal spiculation, if any, unknown.