Remarks: B. laubieri and B. vrijenhoeki are sister species. They form the laubieri group [versus thermydron group (consisting of B. thermydron and B. galapagensis) with non-twisted G1 (versus twisted and S-shaped G1 in the thermydron group), short and regular setation (versus scattered tufts of stiff setae in thermydron group), with short and stout pereopods, the shortest legs being in male B. laubieri (versus longer and more slender in the thermydron group; proportionately the longest and more slender in B. thermydron)].