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 20 View Figure , 37 View Figure , 104–109 View Figure )

Comparison. The new species is immediately distinguished from all others in this genus by its subtriangular clypeus with ventrolateral margins concave ( Fig. 105 View Figure ), twisted mandibles, entirely orange antenna with subapical flagellomere transverse ( Fig. 104 View Figure ), distinctly impressed notauli ( Fig. 106 View Figure ) 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. 106 View Figure ). Clypeus subtriangular (lower margin laterally concave), smooth, with sparse punctures in upper part ( Fig. 105 View Figure ). 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. 104 View Figure ). Face and frons densely granulate ( Figs 105, 106 View Figure ). 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. 106 View Figure ). Propodeum usually with very weak basal keel which is 0.6–0.8× as long as apical area ( Fig. 107 View Figure ). Propodeal spiracle separated from pleural carina by 1.5–2.0× diameter of spiracle.

Fore wing ( Fig. 20 View Figure ) 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. 108 View Figure ). 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 ( NZACAbout 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, NZACAbout 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