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Trachysycon Zittel 1878 (demosponge)

Demospongea - Lithistida - Siphoniidae

PaleoDB taxon number: 3308

Parent taxon: Phymatellinae according to R. M. Finks et al. 2004

Sister taxa: Calymmatina, Craterella, Kalpinella, Paraspelaeum, Phymatella, Phymoracia

Subtaxa: Trachysycon muricatum

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Ecology: stationary epifaunal suspension feeder