Apertochrysa ventralis (Curtis, 1834) Chrysopa ventralis Curtis, 1834: original description Anisochrysa ventralis (Curtis, 1834): Hölzel & Ohm, 1972 Dichochrysa ventralis (Curtis, 1834): Paulian, 1996 Mallada ventralis (Curtis, 1834): Séméria, 1985 Pseudomallada ventralis (Curtis, 1834): Monserrat, 2016 Apertochrysa ventralis (Curtis, 1834): Breitkreuz et al., 2021 Diagnosis: Available live-colored material: 34♀, 12♂ (Switzerland, Germany, Poland) The most prominent and unique trait of the medium to large-sized A. ventralis is the presence of black abdominal sternites (Fig. 16) and the black spot ventrally and on the prothorax. Body coloration grass-green or bluish-green. Tips of the palps dark. Face all green. Vertex green or yellowish-green, sometimes with two brown spots. Scape rarely (5%) with black caudal dots. Interantennal spot usually a very characteristic inverted clove shape (Figs. 4, 17), but more rarely pear- or Y-shaped. Subantennal sutures usually pale, but 13% had red or brown sutures. Female forewings 13.0–16.0 mm, male forewings 11.0–15.0 mm. Costal crossveins completely dark, males with furwings. Dark portion of im cell 12–30%, usually in one piece. Prothorax with one or two pairs of large brown or black spots. Three lateral prothoracic spots large, often one black, two brown. Dorsal abdomen usually without spots, 20% had single pairs of spots on some or most of the segments. The eggs are deposited singly. Distribution: Europe, mainly the northern half.

Published as part of Duelli, Peter & Henry, Charles S., 2022, The Apertochrysa prasina group (Neuroptera: Chrysopidae), with a key to the European species, pp. 61-91 in Zootaxa 5134 (1) on pages 81-82, DOI: 10.11646/zootaxa.5134.1.3, http://zenodo.org/record/6531298