Two new deepwater assfish species, Bassozetus trachibranchus and Bassozetus squamosus, are described from the 29 western Atlantic and four western Indian and western South Pacific specimens, respectively. In addition, a redescription of Bassozetus robustus Smith and Radcliffe in Radcliffe 1913, with which both of the above two new species have been previously confused, is provided on the basis of 14 specimens and its distributional range is revised to the western Pacific Ocean. The three species are separable from the 13 known congeners by the following combination of characters: dorsal-fin rays (116–126), anal-fin rays (95–103), oblique scale rows (30–47), pelvic-fin length (14.3–21.7% SL), a single well-developed median bashibranchial tooth patch, and one or two deep indentations on the sagitta dorsal margin, plus long gill rakers (10–14 in B. robustus) and head, predorsal and prepelvic lengths (20.5–22.8% SL, 19.4–21.1% SL and 15.3–18.1% SL, respectively, in B. robustus). Additionally, B. trachibranchus, B. squamosus and B. robustus are distinguishable from each other as follows: oblique scale rows (39–45 in B. trachibranchus, 44–47 in B. squamosus, and 30–36 in B. robustus), eye diameter to head length ratio (greater in B. squamosus than in similarly sized specimens of the other species), pelvic fin length/distance between pelvic and anal fins ratio (smaller in B. robustus than in similarly sized specimens of the other species), and 2nd to 4th lower limb morphology (many small tooth patches arranged along the outer ridges in B. trachibranchus, absent or a few only in the other species).

分别从29个西大西洋和​​4个西印度和西太平洋标本中描述了两种新的深水water鱼物种，即Bassozetus trachibranchus和Bassozetus squamosus。此外，一个重述Bassozetus粗壮史密斯和拉德克利夫在Radcliffe 1913（以前将上述两个新物种都与之混淆）是在14个标本的基础上提供的，其分布范围已修改为西太平洋。这三个种类可通过以下特征与13个已知同类动物分开：背鳍射线（116–126），臀鳍射线（95–103），斜鳞行（30–47），骨盆鳍长度（14.3-21.7％SL），一个单一的发达位数bashibranchial齿补丁，以及一个或上矢背缘两个深凹槽，加长鳃耙（10-14在B.粗壮）和头部，predorsal和prepelvic长度（20.5-22.8％SL，19.4-21.1％SL和15.3-18.1％SL，分别在B.粗壮）。另外，曲枝芽孢杆菌，鳞茎芽孢杆菌和B.粗壮彼此区分如下：斜鳞片列（39-45在B. trachibranchus，在44-47 B.鳞，和30-36中B.粗壮），眼直径头长度比（大于在鳞状芽胞杆菌中比在其他物种的相同大小的标本中），骨盆鳍长度/骨盆和肛门鳍之间的距离比（在健壮芽孢杆菌中比在其他物种的类似大小的标本中小）以及下肢形态为第二到第四（许多小齿片沿曲枝芽孢杆菌的外脊排列，在其他物种中不存在或仅少数）。