Rhizopsammia Verrill, 1870
Diagnosis.
Small reptoid colonies produced by extra-tentacular stoloniferous budding. Synapticulotheca of finely granular costae, often covered with epitheca. Pourtalès plan present; pali absent. Columella spongy, usually small. Endotheca absent.
Type species.
Rhizopsammia pulchra Verrill, 1870, by monotypy