Type species: Solumbellula monocephalus.
Valid species: Solumbellula monocephalus (Pasternak, 1964).
Diagnosis (from López-González & Drewery 2022): With a single large terminal autozooid. Sclerites monoaxial spindles and rods.
Distribution: Indian, North Atlantic and Southwestern Atlantic Ocean off Argentina. From 3910 m to 4851 m depth (López-González & Drewery 2022).