Melanastera trematos, Serbina & Malenovský & Queiroz & Burckhardt, 2025

The trematos -group

Description. Adult. Head, in lateral view, inclined at ≥ 45° from longitudinal axis of body. Vertex ( Figs 10G–I View FIGURE 10 , 11A–H View FIGURE 11 ) trapezoidal, covered with distinct imbricate microsculpture (partly reduced in ♂ of M. dimorpha sp. nov.: Fig. 10J View FIGURE 10 ) and microscopical setae. Thorax weakly or moderately arched, covered with microscopical setae. Forewing ( Figs 17 View FIGURE 17 , 18A, B View FIGURE 18 ) relatively uniformly coloured, with small brown dots; pterostigma distinctly expanding towards the middle or apical third, longer than 4.0 times as wide; vein R 1 weakly convex or straight medially. Paramere, in lateral view, irregularly spatulate or lanceolate. Distal segment of aedeagus bearing ventral process (small in M. cabucu sp. nov. and M. dimorpha ) which is, in dorsal view, narrower than apical dilation.

Immature. Antenna 10-segmented.

Comments. The group includes eleven species from Brazil described here and Melanastera maculipennis (Brown & Hodkinson) from Panama. Eight species develop on Melastomataceae ( Miconia , Pleroma ), two on Cannabaceae ( Trema ) and one each on Annonaceae ( Guatteria ) and Myristicaceae ( Virola ).