Photomicrographs of Acartophthalmites willii sp. n., holotype ♂ MCZ-PALE-19475 in Baltic amber (mid Eocene). 7 Left wing (slightly narrower than in reality due to the photographic angle, see Fig. 17 for an accurate wing shape) 8 Detail of the A1 vein from the left wing 9 Detail of the A1 vein from right wing 10 Sternum and basal leg segments in frontal view, showing the distoventral processes in Cx3 (arrows). Scale bars 250 µm.