1. Width of fused middle part between pereonites 5 and 6 less than 0.5 of pereonite 5 width....................................... 2
- Width of fused middle part between pereonites 5 and 6 more than 0.5 of pereonite 5 width.................................... 4
2. Article 1 of antennula enlarged, almost reaching to distal margin of rostrum, distomedial lobes of male pleopod 1 shorter than distolateral lobes, medial margin of maxilliped palp article 3 rounded...................... B. daytoni sp. nov.
- Article 1 of antennula reaching no further than 0.7 rostrum length, distomedial lobes of male pleopod 1 longer than distolateral lobes, medial margin of maxilliped palp article 3 somewhat angled......................................................... 3
3. Body cuticle with fingerprint pattern, medial lobe of maxilliped palp article 4 broad, width 2.4 article 5 width, distomedial lobes of male pleopod 1 narrow, rounded, distolateral part of male pleopod 2 protopod enlarged, bent dorsally forming ventral keel............................................................................................................ B. stoddarti sp. nov.
- Body cuticle smooth, medial lobe of maxilliped palp article 4 elongate, width 1.3 article 5 width, distomedial lobes of male pleopod 1 broad, triangular, male pleopod 2 protopod not bent dorsally forming a ventral keel..................... ......................................................................................................................................................... B. grasslei sp. nov.
4. Pleotelson rounded terminally, distomedial lobes of male pleopod 1 truncate.............................................. B. parvus
- Pleotelson truncated terminally, distal lobes of male pleopod 1 rounded................................................... B. latifrons