Zealochus stepheni Khalaim & Ward, 2019

Khalaim, Andrey I. & Ward, Darren F., 2019, Tersilochinae (Hymenoptera: Ichneumonidae) from New Zealand. Part 2. Review of genera Kiwi gen. nov. and Zealochus Khalaim, Zootaxa 4613 (3), pp. 521-545 : 541

Zealochus stepheni Khalaim & Ward , sp. nov.

( Figs 6 , 17, 50–52 , 66)

Comparison. The new species is very similar to Z. abdominosus but differs from this species by darker colouration of head ( Figs 50–52 ), more slender antennal flagellum ( Fig. 50 ), longer distance between propodeal spiracle and pleural carina ( Fig. 52 ) and strongly upcurved ovipositor apex.

Description. Female. Body length 2.9 mm. Fore wing length 2.45 mm. Flagellum weakly clavate, with 15–16 flagellomeres (15 in holotype); subbasal flagellomeres 2.0–2.5× and subapical flagellomere 1.2–1.3× as long as broad. Foveate groove distinct, with short transverse wrinkles, long and usually reaching front margin of mesopleuron anteriorly ( Fig. 52 ). Propodeal spiracle separated from pleural carina by 1.0–2.0× diameter of spiracle. Fore wing with vein 2m-cu interstitial or slightly postfurcal ( Fig. 6 ). Ovipositor strongly upcurved apically ( Fig. 17 ); sheath 1.5–2.0× (2.0× in holotype) as long as hind tibia.

Head dark brown or brownish black; clypeus and lower part of gena next to mandible yellow; face usually yellowish or pale reddish brown ( Figs 50–52 ). Mandible yellow, teeth reddish black. Scape and pedicel of antenna yellow; flagellum entirely black, at most slightly paler basally ( Fig. 50 ). Mesosoma orange or reddish orange, propodeum and metapleuron usually slightly darker ( Fig. 55 ). Pterostigma brown. Legs yellow, hind coxa usually orangish, hind tibia and tarsus sometimes infuscate. Metasoma posterior to second tergite brownish or blackish dorsally.

Male. Flagellum very slender, filiform, with 16–18 flagellomeres; metasoma uniformly brown or dark brown. Otherwise similar to female.

Etymology. The new species is named after Stephen Thorpe, a New Zealand entomologist, and collector of a number of tersilochine specimens included in this study.

Material examined. Holotype female (NZAC), North Island ,AK, St Heliers Dingle Dell, sweeping, 30.IV.2004, coll. J.A. Berry, NZAC04037683 .

Paratypes. AK: 1 ♀ (NZAC) Waikowhai, Mt Roskill, reared in association with Zorion sp. ( Cerambycidae ) on Entelea arborescence , 26.IX.2001, coll. G. Roskill. 1 ♀ (ZISP) same data as holotype. 1 ♂ (NZAC) Henderson, Opanuku Walkway at Chardon Place, foliage, 12.X.2005, coll. S.E. Thorpe. 1 ♀ (ZISP) Whatipu, coastal forest, 19.XI.2009, coll. D. Ward [DNA]. 1 ♂ (ZISP) Huapai, Kauri forest, 20.XI.2009, coll. A.I. Khalaim. BP: 1 ♂ (AMNZ) Te Araroa, Tokata, 5 m, Manuka & Muehlenbeckla scrub around swamp, Yellow pan trap, 2–4.II.1993, coll. J.W. Early & R.C. Henderson. CL: 1 ♂ (NZAC) 19 km E of Tapu, 31.I.1981, coll. J.S. Noyes. 1 ♂ (AMNZ) Little Barrier Island, Summit Track, 335–549 m, 19.I.1983, coll. K.A.J. Wise. 1 ♀ (AMNZ) Cuvier Island, Radar Point Track, 100 m, in forest, Yellow pan trap, 29.III–5.IV.2000, coll. J.W. Early & R.F. Gilbert. 1 ♀ (AMNZ) Great Barrier Island, Mt Hobson, Malaise trap, 30.IV–14.VI.2003, coll. K. Parsons. HB: 1 ♀ (NZAC) Puketitiri, Little Bush, 21.II.1986, coll. T.H. & I.M. Davies. ND: 1 ♀ (AMNZ) Waipoua Forest, Yakas Track, 320 m, Agathis forest, Screen sweep, 13.XI.2000, coll. J.W. Early & R.F. Gilbert. NN: 1 ♀ (NZAC) Nelson, 18.II.1929, coll. E.S. Gourlay. 2 ♀ (NZAC) Nelson, Botanical Hill, sweeping, 10.III.1972, coll. E.W. Valentine. WN: 1 ♂ (ZISP) Lower Hutt, Harbour View Res, Malaise trap, 3–8.XII.2002, coll. Schnitzer. 1 ♀ (ZISP) Wellington, Otari/Wilton Bush, Malaise trap, 6–12.XII.2002, coll. Schnitzer. 1 ♀ (NZAC) Wellington, Huntleigh Park, Malaise trap, 5–9.IV.2003, coll. Schnitzer. 1 ♀ (NZAC) Wellington, Karori Sanctuary, Malaise trap, 11–15.XII.2003, coll. Schnitzer. 1 ♀ and 1 ♂ (NZAC) Wellington, Maupuia Park, Malaise trap, 10–14.II.2004, coll. Schnitzer. BP or GB: 1 ♀ and 1 ♂ (ZISP) Te Koau, track to Hovell’s Watching Dog, 140–240 m, Puriri-nikau-ta waroa forest, Yellow pan trap, 31.I–4.II.1993, coll. J.W. Early. 1 ♀ and 1 ♂ (AMNZ) same data, but screen sweep.

Distribution. North Island (ND, AK, CL, BP, HB, WN), South Island (NN).

Biology. One female was reared in association with Zorion sp. ( Cerambycidae ) on Entelea arborescence .

Figures

FIGURES 1–6. Wings of Tersilochinae, females, paratypes (1, 3–6) and non-type (2): 1—Kiwi barrattae sp. nov.; 2—K. gauldi; 3—K. ruzelus sp. nov.; 4—K. waitakerus sp. nov.; 5—Zealochus abdominosus sp. nov.; 6—Z. stepheni sp. nov. All scale bars 1.0 mm.

FIGURES 46–51. Zealochus abdominosus sp. nov., paratype, female: 46—head with antenna, lateral; 47—head, front; 48— head and mesoscutum, dorsal; 49—propodeum and base of metasoma, dorsolateral. Zealochus stepheni sp. nov., paratype female: 50—head with antennae, lateral; 51—head, front.

FIGURES 52–57. Zealochus stepheni sp. nov., paratype, female: 52—head and mesosoma, lateral. Zealochus supergranulatus, holotype (54, 55, 57) and paratype (53, 56), female: 53—head with antennae and base of mesosoma, lateral; 54—head and mesoscutum, dorsal; 55—head and mesosoma, lateral; 56—fore wings; 57—apex of ovipositor, lateral.

FIGURES 15–17. Zealochus spp., holotypes (16, 17) and paratype (15), females, lateral: 15—Z. abominosus sp. nov.; 16—Z. supergranulatus; 17—Z. stepheni sp. nov.