Barycnellus globosus 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 : 61-63

Barycnellus globosus Khalaim & Ward , sp. nov.

( Figs 15 , 26 , 69–76 )

Comparison. Barycnellus globosus is very similar to B. aucklandellus but differs in having a smooth and shining frons ( Fig. 70 ); and head, in profile, with eyes distinctly displaced below ( Fig. 71 ). It is also generally smaller than B. aucklandellus .

Description. Female. Body length 2.5 mm. Fore wing length 3.1 mm.

Face granulate, dull; frons, vertex and gena more or less smooth and shining ( Fig. 70 ). Head globose, in lateral view about 1.5× as high (from lower margin of clypeus to top of head) as broad, with antennae inserted slightly below level of centre of head ( Fig. 71 ). Clypeus lenticular, not especially broad. Malar space about half as long as basal mandibular width. Flagellum moderately slender, filiform or very weakly narrowed towards apex, with 17– 18 flagellomeres (17 in holotype) ( Fig. 69 ).

Mesosoma mostly granulate, mesopleuron and lateral lobes of mesoscutum sometimes almost smooth ( Fig. 72 ). Mesosoma weakly compressed laterally, with mesoscutum, in dorsal view, 0.6× as broad as head ( Fig. 70 ). Notaulus present, weakly reaching 0.3 along mesoscutum. Foveate groove weak and shallow, situated in centre of mesopleuron ( Fig. 72 ). Propodeum with only weak transverse carina which is often indistinct laterally, mediodorsally with shallow groove which is subequal to or slightly longer than apical area ( Fig. 73 ). Apical area broad (when discernible).

Fore wing ( Fig. 15 ) with vein R1 not reaching apex of the wing. Veins Rs and Rs+2 r meeting at obtuse angle. Vein 2m-cu antefurcal, sometimes almost interstitial. Vein Cu1b intercepted near its centre. Legs robust, hind femur about 3.8× as long as broad ( Fig. 74 ).

Metasoma more or less cylindrical. First tergite granulate, petiole laterally striate, postpetiole posteriorly smooth ( Figs 72, 73 ). Glymma present, sometimes indistinct. Second tergite 1.8× as long as anteriorly broad. Thyridial depression about 2.5× as long as broad. Ovipositor weakly and evenly upcurved, with sharp dorsal subapical notch ( Fig. 75 ); sheath about 1.5× as long as hind tibia.

Head, mesosoma and first tergite dark brown to black. Clypeus mostly yellow, narrowly blackish in its upper part. Palpi, mandible (teeth darkened) and tegula pale. Pterostigma brown. Fore and mid legs yellowish; hind leg yellowish brown with trochanters yellow and coxa dark brown to black. Metasoma behind first tergite predominantly dark brown, tergites 2–6 usually yellowish dorsoposteriorly.

Male. Similar to females in structure and coloration, but often are slightly smaller. Differ from males of B. aucklandellus by the less slender flagellum, eyes conspicuously displaced below, and smooth and shining frons.

Molecular data. BOLD BIN: AAW9309.

Etymology. On account of its globose head shape.

Remarks. In the NZAC there are 74 females and 1 male, all similarly labelled which have apparently been reared from the larva of an elaterid which is preserved along with the ichneumonids.

Material examined. Holotype. Female ( NZAC), New Zealand, AK, Walker Bush Track, 5.XI.1976, A.K. Walker, sweeping, NZAC04036286 .

Paratypes. AK: 1 ♀ ( NZAC) Huia, Malaise trap, in bush, II.1981, B.M. May. 1 ♀ ( NZAC) Huia, Malaise trap, in bush, III.1981, B.M. May. 1 ♀ ( NZAC) Huia, Malaise trap, in bush, IV.1981, B.M. May. 1 ♀ ( NZAC) Lynfield,

Malaise trap, 9.XI.1980, G. Kuschel. 1 ♂ ( NZAC) Lynfield , Malaise trap, 4.XII.1974, G. Kuschel . 2 ♀ and 1 ♂ ( NZAC) Kawau I., Malaise trap, 27.III–13.V.1992, D. Williams . 1 ♀ ( NZAC) Walker Bush Track , 5.XI.1976, A.K. Walker. Birkenhead, Malaise trap, in second growth bush, J.F. Longworth : 3 ♀ and 9 ♂ (2 ♀ and 7 ♂—NZAC, 1 ♀ and 2 ♂—ZISP) X.1980, 4 ♀ and 9 ♂ (3 ♀ and 8 ♂—NZAC, 1 ♀ and 1 ♂—ZISP) XI.1980, 4 ♀ and 5 ♂ (NZAC) XII.1980, 3 ♀ and 7 ♂ (1 ♀ and 6 ♂—NZAC, 2 ♀ and 1 ♂—ZISP) I.1 981, 3 ♀ and 1 ♂ (NZAC) II.1981, 1 ♀ and 4 ♂ (NZAC) III.1981. 1 ♂ ( NZAC) Birkenhead , sweeping, 13. XII.1 982, A.K. Walker . 1 ♂ ( NZAC) Titirangi , Malaise trap, in garden , X.1980, G.W. Ramsay. 1 ♀ and 1 ♂ (NZAC) Titirangi, Malaise trap, in garden, XI.1980, G.W. Ramsay. 2 ♀ (NZAC) Titirangi, Malaise trap, in garden, XII.1980, P.A. Maddison. 1 ♂ (NZAC) Waitakere Ra, XI.1980, J.S. Noyes. 1 ♀ and 11 ♂ (NZAC) Waitakere Ra, I.1981, J.S. Noyes. 1 ♀ and 2 ♂ (NZAC) Waitakere Ra, 26.X.1980, J.S. Noyes. BP: 1 ♀ (NZAC) Te Koau, 243 m, Malaise trap, 31.I–15.III.1993, J.S. Dugdale. 2 ♀ ( NZAC) Rereauira Swamp , Malaise trap, 16.IX–20.X.1992, J.S. Dugdale . 2 ♀ (NZAC) Rotorua, Forest Research Institute, Malaise trap, II.1981, J. Bain. BR: 1 ♀ ( ZISP) Lake Rotoiti , 600 m , Malaise trap, edge of Nothofagus forest, XII.1980, F. Dodge. 1 ♀ ( NZAC) Lake Rotoiti , 600 m , Malaise trap, edge of Nothofagus forest, I.1981, F. Dodge. 1 ♀ ( NZAC) Lake Rotoiti , 600 m , Malaise trap, edge of Nothofagus forest, IV.1981, F. Dodge. CL: 2 ♀ ( AMNZ) Cuvier I., West Ridge Track , 160 m , in forest, Yellow pan trap, 11–18.XI.1999, J.W. Early & S.E. Thorpe. 2 ♀ and 2 ♂ (AMNZ) Cuvier I., Main Ridge Track, 100 m, forest margin, Malaise trap, 10–18.XI.1999, J.W. Early & S.E. Thorpe. 1 ♀ (AMNZ) Cuvier I., Ridge Track, 120 m, forest edge, Malaise trap, 29.III–6.IV.2000, J.W. Early & R.F. Gilbert. 4 ♀ ( AMNZ) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 11.XII.2001 – 18.I.2002, P. Sutton. 1 ♀ ( AMNZ) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 21.II–26.III.2002, P. Sutton. 1 ♀ ( AMNZ) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 13.XII.2002 – 17.I.2003, P. Sutton. 1 ♀ ( AMNZ) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 26.III–16.IV.2002, P. Sutton. 1 ♀ ( AMNZ) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 21.XI–13.XII.2002, P. Sutton. 6 ♀ and 1 ♂ (4 ♀ — AMNZ, 2 ♀ and 1 ♂ — ZISP) Great Barrier Island , Little Windy Hill, 220 m , forest edge, Malaise trap, 7.XI–11.XII.2001, P. Sutton & R.F. Gilbert. 1 ♀ ( NZAC) Kauaeranga Valley , Thames, Malaise trap, 29.XI.1970, H.A. Oliver. GB: 1 ♂ (AMNZ) Te Koau, track to Hovells Watching Dog, Puriri/nikau forest, Screen sweep, 140–240 m, 31.I.1993, J.W. Early. HB: 1 ♀ (NZAC) Puketitiri, Little Bush, 15.III.1986, T.H. & I.M. Davies. 1 ♀ (NZAC) Puketitiri, Little Bush, Malaise trap, cyanide, 27.XII.1986, T.H. Davies. 1 ♀ (NZAC) Puketitiri, Little Bush, Malaise trap, cyanide, 20.XII.1988, T.H. Davies. MC: 1 ♂ ( NZAC) Banks Peninsula, Prices Valley , edge of native bush, Malaise trap, X.1980, R.P. Macfarlane. ND: 1 ♂ ( AMNZ) South of Te Haumi , Paihia, 3.I.1986, K.A.J. Wise. 13 ♀ and 2 ♂ ( NZAC) Waipoua SF, Waipoua R, Ricker Track by bridge, w67/94, reared em: 25.IX.1968, 17.X.1967, J.S. Dugdale. NN: 1 ♂ ( NZAC) Aniseed V. , 6.I.1934, E.S. Gourlay. 74 ♀ and 1 ♂ ( NZAC) Nelson, ex elaterid larva , 4.XI.1929, E.S. Gourlay. 1 ♀ and 1 ♂ ( NZAC) Upper Maitai , Nelson , III.1953, B.B. Given. OL: 2 ♀ (NZAC) Mt Aspiring NP, Makarora, sweeping Nothofagus/Podocarpus, 25.I.1981, J.S. Noyes & E.W. Valentine. TO: 1 ♀ (NZAC) Kaimanawa North Forest Park, 762 m, 20.II.1979, J.S. Dugdale. WN: 3 ♀ (1 ♀ — NZAC, 2 ♀ — ZISP) Wellington, Otari / Wilton Bush, Malaise trap , 6–12.XII.2002, F.R. Schnitzler. 2 ♀ ( NZAC, ZISP) Lower Hutt , Belmont Reg. Park, Malaise trap, 3– 7.XII.2003, F.R. Schnitzler. 8 ♀ (1 ♀ — NZAC, 7 ♀ — ZISP) Lower Hutt , Harbour View Res, Malaise trap, 7– 11.II.2003, F.R. Schnitzler. 1 ♀ ( NZAC) Wellington, Otari / Wilton Bush , Malaise trap, 16–20.IV.2004, F.R. Schnitzler . 1 ♀ ( NZAC) Lower Hutt , Harbour View Res, Malaise trap, 3–8.XII.2002, F.R. Schnitzler. 5 ♀ ( NZAC) Lower Hutt , Harbour View Res, Malaise trap, 3–7.II.2004, F.R. Schnitzler. 1 ♀ ( NZAC) Upper Hutt , Bartons Bush, Malaise trap, 19–23.XII.2002, F.R. Schnitzler. 2 ♀ ( NZAC) Lower Hutt , Belmont Reg. Park, Malaise trap, 3– 7.XII.2003, F.R. Schnitzler. 1 ♀ (NZAC) Otari C, 2–3.I.2003, F.R. Schnitzler. 1 ♀ ( NZAC) Stokes Valley , 17– 23.XII.2002, F.R. Schnitzler. 1 ♀ ( NZAC) Wellington, Otari / Wilton Bush, Malaise trap , 2–6.I.2003, F.R. Schnitzler. 1 ♀ ( NZAC) Wellington, Trelissick Park, Malaise trap , 19–23.XII.2003, F.R. Schnitzler. 1 ♀ ( NZAC) Lower Hutt , Speedy Res, Malaise trap, 22–26.IV.2003, F.R. Schnitzler. 1 ♀ ( NZAC) Lower Hutt , Speedy Res, Malaise trap, 8–12.XII.2003, F.R. Schnitzler. WO: 3 ♀ (1 ♀—NZAC, 2 ♀—ZISP) Whangamarino, wetland, 21.XI–17.XII.2007, C.H. Watts.

Distribution. North Island: AK, BP, CL, GB, HB, ND, TO, WN, WO. South Island: BR, MC, NN, OL. Widely distributed throughout New Zealand and the most abundant species of the genus.

Figures

FIGURES 10–15. Wings of Tersilochinae, females: 10—Aotearoazeus coronetus sp. nov.; 11—A. probles sp. nov.; 12— Barycnellus aucklandellus sp. nov.; 13—B. conlisus sp. nov.; 14—B. cuvierensis sp. nov.; 15—B. globosus sp. nov.

FIGURES 21–26. Holotypes (all except 25) and paratype (25), females, lateral: 21—Aotearoazeus bullivantus sp. nov.; 22— A. probles sp. nov.; 23—Barycnellus aucklandelus sp. nov.; 24—B. conlisus sp. nov.; 25—B. cuvierensis sp. nov.; 26—B. globosus sp. nov.

FIGURES 65–71. Barycnellus cuvierensis sp. nov., paratype, female: 65—head with antenna, lateral; 66—anterior part of mesosoma and head, lateral; 67—head, dorsal; 68—ovipositor, lateral. Barycnellus globosus sp. nov., paratype, female: 69— anterior part of mesosoma and head with antennae, lateral; 70—mesoscutum and head, dorsal; 71—head, lateral.

FIGURES 72–79. Barycnellus globosus sp. nov., paratype, female (72–75) and male (76): 72—mesosoma and first tergite, lateral; 73—propodeum and base of metasoma, dorsolateral; 74—hind leg, lateral; 75—apex of metasoma with ovipositor, lateral; 76—metasoma. Barycnellus robustus sp. nov., paratype, female: 77—head and mesoscutum, dorsal; 78—head, lateral; 79—head with antenna, lateral.