RHABDAMMINA M. Sars, 1869
Type species: Rhabdammina abyssorum M. Sars, in Carpenter, 1869; OD.
Rhabdammina M. Sars, in Carpenter, 1869 (*488), p. 61. Rhabdammina M. Sars, 1869 ( *2734), p. 248 ( nom. nud. ); M. Sars, in Carpenter, 1868 (*487), p. 171, 172 (nom. nud.).
Arrhabdammum Rhumbler. 1913 (*2621), p. 351 (err. emend.).
Test with three, or less commonly four to five, radiating tubes of nearly constant diameter, cavity in central area globular, that of branches narrow, about one-third the diameter of the branches; wall thick, of firmly cemented coarse sand grains, exterior rough but cavity interior smooth; apertures at the open ends of the tubular rays. Holocene, in deep water, from 700 m to 4,800 m; cosmopolitan.