Petalacmis triplehorni sp. nov., male thorax. A–E prothorax: A dorsal B ventral C anterior D posterior E lateral. F–K pterothorax: F mesoscutellum, dorsal G alinotum, dorsal H pterothorax, ventral I pterothorax, dorsal (detail of meso and metaendosterna J alinotum, dorsal K pterothorax and abdominal tergum I, lateral L–N wings: L elytron, dorsal M elytron, lateral (outer view) N left wing, dorsal O, P legs: O left pro, meso and metaleg (left to right) P detail of left pro, meso and metaleg apices (left to right). Scale bars: 500 µm (A–K); 1 mm L–N; 750 µm (O); 250 µm (P).