Haeckel, 1879
Umbrella highly vaulted, thick; about 16 square marginal lappets; lateral portions of peripheral canals broad at base, tapering outwards. Umbrella up to 30 mm wide and about 20 mm high; marginal lappets with 5-7 (or 9) statocysts; otoporpae short and narrow, about twice as long as width of transverse section of peripheral canals; gonads simple or lobed sacs.