♂ Metopiellus guanano sp. nov., holotype A segment VIII (tergum VIII and sternum VIII), lateral view B sternum VIII C tergum VIII D, aedeagus, ventral view E aedeagus, dorsal view F aedeagus, lateral view. Scale bars: 0.5 mm (A); 0.2 mm (B, C); 0.2 mm (D–F).