1	Anterior edge of carpus of pereopod 7 with four long plumose setae	B. juxtacornis K.H. Barnard, 1931
–	Anterior edge of carpus of pereopod 7 without plumose setae	2
2	Urosomite 1 not obviously produced to form a carina (from lateral view)	B. esferis J.L. Barnard, 1961
–	Urosomite 1 obviously produced to form a carina (from lateral view)	3
3	Urosomite 1 carina bilobed (from dorsal view)	4
–	Urosomite 1 carina not bilobed (from dorsal view	5
4	Uropod 2 inner ramus with robust setae	B. blasensis J.L. Barnard, 1964
–	Uropod 2 inner ramus without robust setae	B. arcillis J.L. Barnard, 1961
5	Pereopod 7 basis ventral lobe acute	B. plumicornis Ledoyer, 1978
–	Pereopod 7 basis ventral lobe rounded	6
6	Anteroventral corner of head produced and rounded	B. bellansantiniae sp. n.
–	Anteroventral corner of head not produced	B. profundi Mills, 1971