Neurogoniella van Achterberg & Long, 2024

Oanh, Nguyen Thi, Long, Khuat Dang, Achterberg, Cornelis Van, Nghiep, Hoang Thi & Hiep, Nguyen Duc, 2024, A new genus and rare genera of Macrocentrinae from the Oriental region (Hymenoptera: Braconidae), Zootaxa 5551 (3), pp. 580-590 : 583-584

Neurogoniella van Achterberg & Long , gen. nov.

Type species: Macrocentrus crassinervis Nixon, 1950 .

Diagnosis. Antenna with 46–47 antennomeres ( Nixon 1950, this paper); maxillary palpus long, 1.6 × height of head; clypeus slightly concave medio-ventrally ( Fig. 4C ); mandibular teeth rather robust, mandible strongly twisted; malar suture obsolescent ( Fig. 4C ); notauli deep anteriorly, wider and shallow posteriorly, smooth or nearly so; prescutellar sulcus narrow laterally, crenulate; propodeum punctate or punctulate anteriorly, with fine semi-circular striation posteriorly ( Figs 4E, F ); vein cu-a of fore wing postfurcal, strongly swollen basally ( Fig. 4G ). Inner and outer hind tibial spurs longer 0.5 × length of hind basitarsus; hind tarsal claws with large acute lobe and with basal pecten ( Fig. 4D ); vein C-SC+R of hind wing with two setae, and vein R1 straight, apex of R1 with four curved hamuli; vein cu-a curved outward ( Fig. 4G ); vein SR curved basally, resulting in oval basal part of marginal cell and cell distinctly widened apically; vein 1-SC+R horizontal (longitudinal) ( Fig. 4I ); first metasomal tergite smooth or superficially finely sculptured; ovipositor sheath distinctly longer than metasoma and about 0.7 × as long as fore wing.

Small Oriental genus, containing parasitoids of Noctuidae .

Etymology. Derived from “neuron” (Greek for nerve) and “gonio” (Greek for angle), because of the angled vein M+CU1 of the fore wing. Gender: feminine.

Notes. The postfurcal and basally strongly swollen vein cu-a of the fore wing readily separates the new genus from other known Oriental macrocentrine genera. The new genus shares with the Afrotropical genus Dicranoneura Kriechbaumer, 1894 the modified veins M+CU1 and cu-a of the fore wing. However, Dicranoneura differs by having vein SR1 of hind wing straight or nearly so basally (strongly sinuate in Neurogoniella ) and base of vein cu-a of fore wing at most moderately widened (strongly widened in Neurogoniella ). The widened vein cu-a of the fore wing is an autopomorphy among macrocentrine genera but occurs also in genera of other subfamilies, e.g., Gyroneuron Kokujev, 1901 ( Rogadinae ).

Figures

FIGURE 4 A–K. Diagnostic characters of Neurogoniella crassinervis (Nixon), Vietnam, female, “Macr.080”(IEBR) A Head, dorsal B Mesopleuron C Head, frontal D Hind tarsal claw E Propodeum, dorsal F Propodeum, lateral G Fore wing H First– fourth metasomal tergites I Hind wing J Middle femur, outer side K Hind femur, outer side.