SIPHONINOIDES Cushman. 1927
Tipe species: Planorbulina echinata Brady. 1879 (*338), p. 283; OD.
Siphoninoides Cushman. 1927 (*742), p. 77.Test subglobular, irregularly trochospiral, chambers enlarging rapidly: wall calcareous, hyaline, thin in the early stage, later much thickened and coarsely perforate, surface pustulose; aperture elevated on a short neck, rounded, and filled with a concave plate that has a single small central pore. Miocene to Holocene; Australia: Pacific Ocean: Indian Ocean; Caribbean: Cuba.
Remarks: As noted by Hofker (1970, *1519, p. 33), the previously reported large round aperture and phialine lip are incorrect interpretations. The neck contains a concave plate that is pierced centrally by a small opening.