Leucaltis Haeckel, 1872

Diagnosis. " Leucaltidae with a body composed of large, ramified and anastomosed tubes. Each tube has a distinct cortex, a choanoderm composed of elongated and ramified choanocyte chambers, and a central atrium. The choanoderm and the atrial wall have a secondary skeleton composed of small triactines and tetractines" (Borojevic et al. 2002).

Type species. Leucaltis clathria Haeckel, 1872