A new brown lacewing species of the genus Pseudonotherobius Makarkin, 2024 (Neuroptera: Hemerobiidae) from the Eocene Baltic amber

A new species of the lacewing family Hemerobiidae, Pseudonotherobius fenestromaculatus sp. nov., is described from the Eocene Baltic amber. The new species is assigned to Pseudonotherobius based on the following characters: the forewing RP with three ORBs, the ORB1 and CuP deeply forked, and the presence of dark brown coloration. The species can be distinguished from Pseudonotherobius kohlsi Makarkin, 2024 by the forewing membrane medially with a large dark marking from costal margin to M vein along third gradate series, and distally with a broad dark marking covering whole wing apex. Our finding provides new evidence for understanding the palaeodiversity of brown lacewings from the Tertiary.