Gauldiana triangulata Khalaim & Ward,

Khalaim, Andrey I. & Ward, Darren F., 2018, Tersilochinae (Hymenoptera: Ichneumonidae) from New Zealand. Part 1. Generic key and three new genera, Zootaxa 4425 (1), pp. 41-77: 75-76

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Gauldiana triangulata Khalaim & Ward

sp. nov.

Gauldiana triangulata Khalaim & Ward  , sp. nov.

( Figs 20View FIGURES 16–20, 37View FIGURES 32–37, 104–109View FIGURES 104–109)

Comparison. The new species is immediately distinguished from all others in this genus by its subtriangular clypeus with ventrolateral margins concave ( Fig. 105View FIGURES 104–109), twisted mandibles, entirely orange antenna with subapical flagellomere transverse ( Fig. 104View FIGURES 104–109), distinctly impressed notauli ( Fig. 106View FIGURES 104–109) and large body.

Description. Female. Body length 4.9 mm. Fore wing length 3.8 mm.

Head strongly rounded behind eyes in dorsal view, with gena short, about 0.65× as long as eye width ( Fig. 106View FIGURES 104–109). Clypeus subtriangular (lower margin laterally concave), smooth, with sparse punctures in upper part ( Fig. 105View FIGURES 104–109). Mandible basally robust, apically twisted about 40–45°, with upper tooth much longer than lower tooth. Malar space 0.6–0.8× as long as basal mandibular width. Flagellum short, clavate, with 19–21 flagellomeres, basally slender and with subapical flagellomere transverse ( Fig. 104View FIGURES 104–109). Face and frons densely granulate ( Figs 105, 106View FIGURES 104–109). Vertex finely granulate, dull. Genae centrally smooth and shining.

Mesosoma with notaulus rather strongly impressed, with fine wrinkle along anterior margin of the depression ( Fig. 106View FIGURES 104–109). Propodeum usually with very weak basal keel which is 0.6–0.8× as long as apical area ( Fig. 107View FIGURES 104–109). Propodeal spiracle separated from pleural carina by 1.5–2.0× diameter of spiracle.

Fore wing ( Fig. 20View FIGURES 16–20) with vein R1 almost reaching apex. Vein 2m-cu interstitial or slightly postfurcal. Hind wing with vein cu1&cu-a reclivous.

First metasomal tergite rather strongly depressed, transversely oval in cross-section ( Fig. 108View FIGURES 104–109). Second tergite about as long as broad anteriorly. Ovipositor apically strongly upcurved; sheath 1.3–1.5× as long as hind tibia.

Head black; clypeus, palpi and lower end of gena orange. Antenna orange, slightly infuscate basally. Mesosoma reddish orange, with three mesoscutal marks and mesosternal region blackish. Pterostigma brown. Legs brownish yellow; hind coxa reddish brown; hind femur centrally, tibia and tarsus more or less darkened with brown. First metasomal tergite reddish orange to reddish brown. Metasoma behind first tergite brownish yellow.

Male. Flagellum with 21–22 flagellomeres, filiform. Otherwise similar to female.

Etymology. Named on account of its subtriangular clypeus.

Remarks. Large numbers of individuals of this species have been reared from the scolytid-infested wood of Pseudopanax simplex  ( Araliaceae  ). One female was reared from Hebe stricta  ( Plantaginaceae  ).

Material examined. Holotype. Female ( NZAC), New Zealand, NN, Dun Mt. Tramway, 548 m, ex wood of Pseudopanax simplex  , collected 24.VIII.1967, emerged 6.XI.1967, J.I. Townsend, NZAC 0 4036599.

Paratypes. NN: 52 ♀ and 44 ♂ (46 ♀ and 40 ♂—NZAC, 6 ♀ and 4 ♂—ZISP) data as holotype. 4 ♂ (NZAC) Pretty Bridge V, pasture, pit trap, 9.XI.1966, G. Hitchings. 1 ♀ (NZAC) Whangamoa Saddle, ex Hebe stricta  , collected 14.III.1966, emerged 27.III.1966, J.I. Townsend.

Distribution. South Island: NN.


New Zealand Arthropod Collection