| Individual tubular sponges with one apical osculum. |
| white or white at base & fade to reddish apic |
| The articulated choanoskeleton is made up by numerous rows of sagittal triactines. The atrial skeleton contains tetractines with the apical ray protruding to the atrium and triactines, which may have a very long unpaired actine (more than four times the size of the paired actines). The osulum has a fringe of trichoxea. |
| The cortex contains longitudinal giant diactines (up to four in a row). |
| Cortical giant diactines, oscular trichoxeas, choanosomal and sub-atrial sagittal triactines, atrial tetractines and sagittal triactines, latter with sometimes elongated upaired actine. |
