Gauldiana dubia Khalaim & Ward, 2018

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 : 71

Gauldiana dubia Khalaim & Ward , sp. nov.

( Figs 31 , 98, 99 )

Comparison. The new species is very similar to G. postfurcalis but differs from this species by the shorter vein R 1 in the fore wing, dark mesosoma ( Fig. 31 ), and a slightly shorter ovipositor. Also differs from G. aspiringa by the shorter ovipositor.

Description. Female. Small species. Body length 3.2 mm. Fore wing length 2.8 mm.

Head in dorsal view with gena 0.8× as long as eye width. Flagellum slightly clavate, with 16 flagellomeres in paratype and 18 flagellomeres in holotype ( Fig. 99 ); second flagellomere about twice as long as broad and subapical flagellomeres slightly elongate. Clypeus lenticular, finely granulate and with a few scattered punctures in upper half. Malar space distinctly shorter than basal mandibular width in holotype and almost as long as basal mandibular width in paratype. Upper tooth somewhat longer than lower tooth.

Propodeum with basal part almost as long as apical area. Propodeal spiracle very small, separated from pleural carina by almost 2.0× diameter of spiracle.

Fore wing with vein R1 not reaching apex of the wing. Vein 2m-cu postfurcal, weakly pigmented, its posterior 0.3 distinct. Hind wing with vein cu1&cu-a reclivous.

Metasoma with first tergite very slender, round in cross-section, strongly granulate to irregularly wrinkled. Second tergite about 1.3× as long as broad anteriorly. Thyridial depression very weak (sometimes indistinct), elongate. Ovipositor slender, weakly upcurved, more or less evenly tapered towards apex; sheath 1.1–1.3× as long as hind tibia.

Head, mesosoma and first tergite brownish black to black ( Fig. 98 ). Clypeus brownish yellow in lower half, blackish in upper part. Palpi brown. Mandible (teeth black) brownish yellow. Antenna black, scape and pedicel paler. Pterostigma brown. Legs brownish yellow, hind coxa blackish, all tarsi fuscous.

Male. Unknown.

Etymology. Named from the Latin dubius (doubtful, dubious, uncertain).

Remarks. The paratype is conspicuously smaller than the holotype, with body length 2.3 mm and fore wing length 2.1 mm; the malar space is longer; and vein R1 is somewhat shorter than in the holotype. This species (as “Gsp.d”) is listed as “Data Deficient” on the New Zealand threatened species list ( Ward et al. 2012).

Material examined. Holotype. Female ( NZAC), New Zealand, BR, Lake Rotoiti, 600 m, edge of Nothofagus forest, Malaise trap, XI.1980, F. Dodge, NZAC04035368 .

Paratype. BR: 1 ♀ ( ZISP) Lake Rotoiti , 600 m, edge of Nothofagus forest, Malaise trap, XI.1980, F. Dodge.

Distribution. South Island: BR.

Figures

FIGURES 27–31. Holotypes (all except 30) and paratype (30), females, lateral: 27—Barycnellus robustus sp. nov.; 28— Diaparsis zealandica sp. nov.; 29—Gauldiana arantia sp. nov.; 30—G. aspiringa sp. nov.; 31—G. dubia sp. nov.

FIGURES 98–103. Gauldiana dubia sp. nov., paratype, female: 98—body, lateral; 99—head with antenna, lateral. Gauldiana kaweka sp. nov., paratype, female: 100—head with antenna, lateral. Gauldiana minuta sp. nov., paratype, female: 101—head with antenna, lateral; 102—propodeum, dorsolateral; 103—apex of mesosoma and metasoma with ovipositor, lateral.