Demospongea - Agelasida - Thaumastocoeliidae

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

Sister taxa: Lingyunocoelia, Naybandella, Pamirothalamia, Pamiroverticillites, Shotorithalamia, Sphaeroverticillites

Subtaxa: Thaumastocoelia cassiana, Thaumastocoelia dolomitica, Thaumastocoelia irregularis, Thaumastocoelia ovoidalis, Thaumastocoelia sphaeroida

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Type: Thaumastocoelia cassiana

Ecology: stationary epifaunal suspension feeder