Monoctonus canadensis Čkrkić, Petrović & Tomanović, 2019

Čkrkić, Jelisaveta, Petrović, Andjeljko, Kocić, Korana, Kavallieratos, Nickolas G., Hebert, Paul D. N. & Tomanović, Željko, 2019, Review of the world Monoctonina Mackauer 1961 (Hymenoptera, Braconidae, Aphidiinae): key for their identification and descriptions of five new species, Zootaxa 4691 (4), pp. 359-385 : 364-366

Monoctonus canadensis Čkrkić, Petrović & Tomanović , sp. n.

Holotype. Female. Canada, Alberta, Banff National Park, Baker Creek picnic area, 15 VI 2012, coll. BIOBus 2012, Malaise trap . Holotype slide mounted and deposited in CNC . Paratypes: Canada, British Columbia, Gulf Islands National Park Reserve, North Pender Island , 22 VI 2014, 1 female, 1 male; 27 VI 2014, 1 male. Paratypes slide mounted and deposited in FBUB. ( Fig. 3 a–h)

Diagnosis. This species most resembles M. nervosus and M. brachyradius , but can be differentiated from both by more elongated ovipositor sheath (ovipositor length/width ratio: 3.5 in M. canadensis , 3 in M. brachyradius and 2.7 in M. nervosus ) and the length of R1 (length of pterostigma/R1 is 3.9–4.4), longer than in M. brachyradius (4.8–5.1) and shorter than in M. nervosus (1.8–2.3).

Female. Head ( Fig. 3a ). Eyes oval, medium sized, sparsely setose. Malar space equal to 0.14 of longitudinal eye diameter. Tentorial index 0.3. Clypeus oval with 9 setae. Maxillary palps with four palpomeres, labial palps with three palpomeres. Antenna with 16 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter ( Fig. 3b ). Flagellomere 1 (F1) 4× as long as wide, without longitudinal placodes. F2 3.6× as long as wide, with 1 longitudinal placode ( Fig. 3c ). F3, F4 and F5 with 3–4, 3–4 and 2 longitudinal placodes, respectively. F1 length equal to F2.

Mesosoma. Mesoscutum without notaulices, setose in lower half ( Fig. 3d ). Head width/mesoscutum width ratio 1.3. Propodeum areolated, with irregular oblique carinae ( Fig. 3e ).

Fore wing ( Fig. 3h ). Wing length 2.4 mm, width 1 mm. Stigma narrow, 6.5× as long as wide and 4.2× as long as distal abscissa of R1. Vein m-cu distinct, colourless in the middle, 2RS effaced near m-cu. Veins r and 3RS dis- tinct.

Metasoma. Petiole 2.5× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with one irregular median carina in middle third and with 5–6 long setae on each side ( Fig. 3f ). Ovipositor sheath moderately plough- share shaped. Ovipositor sheath length/width ratio about 3.5 ( Fig. 3g ).

Colour. Head brown, eyes black. Face with mouthparts and clypeus brownish-yellow. Scapus, pedicel and F1 yellow, with apical ¼ of F1 brown, remainder of antenna brown. Mesonotum brown, propodeum yellowish-brown, legs yellow. Wings hyaline with brown venation. Petiole brown, rest of metasoma and ovipositor sheath yellowishbrown. Body length 2.3 mm.

Male. Head. Eyes oval, medium sized, sparsely setose. Malar space equal to 0.3 of longitudinal eye diameter. Tentorial index 0.5. Clypeus oval with 5–6 setae. Maxillary palps with four palpomeres, labial palps with three palpomeres. Antenna with 18 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter. Flagellomere 1 (F1) 2.8× as long as wide, with 7 longitudinal placodes. F2 2.6× as long as wide, with 6 longitudinal placodes. F3, F4 and F5 with 6, 5 and 5 longitudinal placodes, respectively. F1 length equal to F2.

Mesosoma. Mesoscutum without notaulices, with scattered long setae on dorsal surface. Head width/mesoscutum width ratio 1.3. Propodeum areolated, with irregular oblique carinae.

Fore wing. Wing length 2 mm, width 0.8 mm. Stigma narrow, 6.5× as long as wide and 3.9× as long as distal abscissa of R1. Vein m-cu distinct, colourless in the middle, 2RS effaced near m-cu. Veins r and 3RS distinct.

Metasoma. Petiole 2.5× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with one irregular median carina in middle third and with 5–6 long setae on each side.

Colour. Head brown, mouthparts light brown, antenna brown. Mesonotum light brown, propodeum and legs yellowish-brown. Wings hyaline with brown venation. Petiole yellowish-brown, rest of metasoma brown. Body length 2.1 mm.

Host: unknown.

Distribution. Western Canada.

Etymology: The name of the new species refers to its known distribution.

Figures

FIGURE 3. Monoctonus canadensis sp.n., female. a—head; b—antenna; c—F1 and F2; d—mesoscutum; e—propodeum; f—petiole; g—ovipositor; h—fore wing.