Costalampys joanae sp. nov. A, Male habitus, dorsal view; B, Male habitus, ventral view; C, Male antenna, lateral view; D, Male pronotum, dorsal view; E, Sternum IX, ventral view; F, Pygidium, dorsal view; G, Syntergite, dorsal view; H, Sternum IX, Ventral view; I, Aedeagus, dorsal view, blue arrow pointing to the transverse keel on the dorsal plate; J, Aedeagus, lateral view; K, Aedeagus, ventral view; L, Aedeagus, oblique view, red arrow pointing to the ventral plate. Scale bar: 2 mm (A–C); Scale bar: 1.0 mm (D–L).