Family Leucaltidae Dendy & Row, 1913

Diagnosis. ‘ Clathrinida with a tubular, ramified or even anastomosed cormus with many oscula, or individualised with a large central atrium and a single osculum. The sponge wall is composed of a distinct cortex sustained by a well-developed skeleton, and a choanosome. The skeleton of the choanosome and the atrial wall may be absent or composed of small and dispersed triactines and tetractines.’ (Borojević et al. 1990).

Remarks. The family Leucaltidae is not monophyletic (Voigt et al. 2012).