Monoctonus parvipalpus 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 : 368-371

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

Holotype. Female. Canada, British Columbia, Vancouver, Stanley Park , 8 VII 2014, coll. J. Sibbald, Malaise trap . Holotype slide mounted and deposited in CNC. ( Fig. 6 a–h)

Diagnosis. Based on wing venation, this species resembles M. nervosus . It can be easily differentiated by antennae with 18 antennomeres, elongated F1 (length/width ratio is 4.9–5, 4 in M. nervosus ), labial palps with 1 palpomere and moderately widened ovipositor sheaths (length/width ratio 3.6 in M. parvipalpus ; 2.7 in M. nervosus ).

Female. Head ( Fig. 6a ). Eyes oval, medium sized, sparsely setose. Malar space equal to 0.12 of longitudinal eye diameter. Tentorial index 0.17. Clypeus oval with 8 setae. Maxillary palps with four palpomeres, labial palps with one palpomere.Antenna with 18 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter ( Fig. 6b ). Flagellomere 1 (F1) 5× as long as wide, without longitudinal placodes. F2 4.3× as long as wide, with 0–1 longitudinal placode ( Fig. 6c ). F3, F4 and F5 with 2–3, 3–4 and 2–3 longitudinal placodes, respectively. F1 1.2× longer than F2.

Mesosoma. Mesoscutum without notaulices, with scattered setae on dorsal surface ( Fig. 6d ). Head width/mesoscutum width ratio 1.3. Propodeum areolated, with moderately narrow central pentagonal areola ( Fig. 6e ).

Fore wing ( Fig. 6h ). Wing length 2.6 mm, width 1 mm. Stigma narrow, 6.9× as long as wide and 3.3× as long as distal abscissa of R1. Vein m-cu distinct, 2RS visible in first half, effaced near m-cu. Veins r and 3RS distinct.

Metasoma. Petiole 2× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with 6–7 long setae on each side ( Fig. 6f ). Ovipositor sheath moderately ploughshare shaped. Ovipositor sheath length/width ratio 3.6 ( Fig. 6g ).

Colour. Head brown, eyes black. Face with mouthparts and clypeus brownish-yellow. Scapus, pedicel and basal two thirds of F1 yellow, remainder of antenna brown. Mesonotum yellowish-brown, propodeum and legs yellow. Wings hyaline with brown venation. Petiole, rest of metasoma and ovipositor sheath yellow. Body length 2.8 mm.

Male. Unknown.

Host: unknown.

Distribution. Western Canada.

Etymology: The name of this species is derived from Latin parvus for small and palpus and refers to its number of labial palpomeres (1) which is less than in any other known Monoctonus species.

Figures

FIGURE 6. Monoctonus parvipalpus sp.n., female. a—head; b—antenna; c—F1 and F2; d—mesoscutum; e—propodeum; f—petiole; g—ovipositor; h—fore wing.