BRACHYSIPHON Chapman, 1906
Type species: Brachysiphon corbuliformis Chapman, 1906; OD.
Brachysiphon Chapman. 1906 (*535), p. 83. Arbrachysiphum Rhumbler, 1913 (*2621), p. 351 (err. emend.).
Test free, subcylindrical; wall with a distinct proteinaceous inner layer, and an outer layer of coarse particles including tests of other foraminifers, agglutinated in a finer ground mass; aperture terminal, rounded, bordered by a thickened extension of the organic lining. Holocene, at 220 m; S. Pacific: off New Zealand, North Island .