Vorstadt Manukyan, 2023

Manukyan, A. R., 2023, New data on the subfamily Hybrizoninae (Hymenoptera: Ichneumonidae) in Baltic Amber, Russian Entomological Journal 32 (4), pp. 403-409 : 405-406

Genus Vorstadt Manukyan , gen.n.

Type species: Vorstadt ambermuseum Manukyan , sp.n.

ETYMOLOGY. The genus name comes from the German word meaning “suburb”. This was the name of the Jewish district in Königsberg where the famous Amber Manufactory was located.

DIAGNOSIS. It is distinguished from other genera of recent and fossil Hybrizoninae by flagellomeres with distinct constriction in the middle, and also by three-segmented maxillary palps. The genus Paxylobembra with unknown morphology of antennae and palpi resembles Vorstadt gen.n. by absence of notauli and S-curved vein 4Rs. However, the latter genus differs from Paxylobembra by much larger body size and presence of vein r-m.

Type species. Vorstadt ambermuseum Manukyan sp.n., by present designation.

Species composition. Vorstadt ambermuseum Manukyan sp.n.; V. groehni ( Tolkanitz et Perkovsky, 2015).

DESCRIPTION. Flagellum 11–13-segmented, all flagellomeres including first one with distinct medial constriction ( Figs 4–5 ). Occipital carina obliterated. Small obscure area at level of stemmaticum (area bounded by the ocelli) probably preserved. Maxillary palps 3-segmented, long, not reduced; segment 2 not widened at apex; labial palps reduced, 2-segmented. Forewings with vein 2m-cu ( Figs 1–2 ). Length of vein 4Rs 4-5.2 times as long as vein r-rs. Vein 1cu-a (nervulus) interstitial. Fore tarsi as long as middle tarsi. Base of 1T distinctly above base of hind coxae. 1T and basal half of 2T probably longitudinally striated.

NOTE. Accurate determination of the number of apical flagellomeres is problematic because the difference between constrictions and segment boundaries is unclear.

Figures

Figs 4–5. Vorstadt ambermuseum sp.n., holotype, female: 4 — flagel- lomeres of left flagellum, arrows indicate constrictions; 5 — 4th to 11th flagellomere of left flagellum, arrows indicate constrictions. Рис. 4–5. Vorstadt ambermuseum sp.n., голотип, самка: 4 — левый жгутик, стрелками покаЗаны перетЯжки; 5 — 4–11-й членики левого жгутика, стрелками покаЗаны перетЯжки.

Figs 1–2. Vorstadt ambermuseum sp.n., holotype, female: 1 — dorsal view; 2 — fragment of front wing. Рис. 1–2. Vorstadt ambermuseum sp.n., голотип, самка: 1 — вид сверху; 2 — фрагмент переднего крыла.