Figure 2; Sphaerillo boninensis A right mandible, holotype (male) B left mandible, holotype (male) C outer endite of first maxilla, holotype (male) D inner endite of first maxilla, holotype (male) E second maxilla, holotype (male) F maxilliped, holotype (male). Scale bars: 100 μm (A, B); 50 μm (C–F).