Monoctonus paulensis (Ashmead, 1902)

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 : 377-379

Monoctonus paulensis (Ashmead, 1902)

( Figs 7h , 8h , 9h )

Aphidius paulensis Ashmead 1902: 246

Material examined. Canada, Alberta, Jasper National Park, 21 VII 2012, 1 female, Malaise trap; Waterton Lakes National Park, 27 VI 2012, 1 male, Malaise trap; British Columbia, Abbottsford, 9 VI 2005, 1 female reared from Myzus persicae (Sulzer) on Capsicum annuum ; 10 VI 2005, 1 female reared from Myzus persicae on Capsicum annuum ; 12 VI 2005, 3 females reared from Myzus persicae on Capsicum annuum ; 13 VI 2005, 1 female reared from Myzus persicae on Capsicum annuum ; 12 VII 2005, 2 females reared from Aulacorthum solani (Kaltenbach) on Capsicum annuum ; Gulf Islands National Park Reserve, 6 VII 2012, 1 male, Malaise trap; Glacier National Park, 6 VIII 2014, 1 female, Malaise trap; Manson Landing, 30 IX 2016, 1 female, Malaise trap; Newfoundland and Lab- rador, Gros Morne National Park, 17 IX 2013, 1 female, Malaise trap; Northwest Territories, 13 VIII 2014, 1 male, Malaise trap; USA, Alaska, Amatignak, 10 VI—1 IX 2008, 1 female from Malaise trap on Leymus sp.; Little Sitkin, 9 VI—1 IX 2008, 1 female from Malaise trap on Leymus sp.

Female. Head. Eyes oval, medium sized, sparsely setose. Malar space equal to 0.3 of longitudinal eye diameter. Tentorial index 0.3. Clypeus oval with 8–9 setae. Maxillary palps with four palpomeres, labial palps with three palpomeres. Antenna with 15–16 antennomeres, filiform, setae on flagellomeres semierect, subequal to flagellomere diameter. Flagellomere 1 (F1) about 4 (3.6–4.7)× as long as wide, without longitudinal placodes. F2 about 3.3 (2.7–3.7)× as long as wide, with 0–1 longitudinal placode. F3, F4 and F5 with 0–2, 1–3 and 0–2 longitudinal placodes, respectively. F1 length equal to F2.

Mesosoma. Notaulices on mesoscutum sometimes absent, sometimes barely visible in anterior part. Dorsal surface of mesoscutum sparsely setose; sometimes with two longitudinal rows of setae. Head width/mesoscutum width ratio 1.5. Propodeum areolated, with moderately narrow central pentagonal areola ( Fig. 7h ).

Fore wing ( Fig. 8h ). Wing length about 1.9 (1.7–2.1) mm, width about 0.7 (0.6–0.8) mm. Stigma narrow, about 6.4 (5.5–7.9)× as long as wide and about 2.5 (2.1–3)× as long as distal abscissa of R1. Veins m-cu and 2RS visible, both sometimes colourless in second half or missing completely. Veins r and 3RS distinct.

Metasoma. Petiole about 2.1 (1.7–2.3)× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with 6–9 long setae on each side. Ovipositor sheath distinctly ploughshare shaped. Ovipositor sheath length/width ratio about 2.7 (2.1–2.9) ( Fig. 9h ).

Colour. Head brown, eyes black, mouthparts light brown. Scapus and pedicel brown, F1 with a narrow basal ring or first half yellow, remainder of antenna brown. Mesonotum, propodeum and legs brown. Wings hyaline with brown venation. Petiole and rest of metasoma brown, ovipositor sheath light brown to brown. Body length 2.5 mm.

Male. Head. Eyes oval, medium sized, sparsely setose. Malar space equal to 0.3 of longitudinal eye diameter. Tentorial index 0.4. Clypeus oval with 9–10 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) about 2.4 (2.3–2.5)× as long as wide, with 4–9 longitudinal placodes. F2 about 2.5 (2.2–2.6)× as long as wide, with 4–9 longitudinal placodes. F3, F4 and F5 with 4–9, 5–8 and 4–8 longitudinal placodes, respectively. F1 length subequal to F2.

Mesosoma. Mesoscutum without notaulices, scarcely setose in lower half. Head width/mesoscutum width ratio 0.8. Propodeum areolated, with moderately narrow central pentagonal areola.

Fore wing. Wing length 2.2 mm, width about 0.9 (0.9–1) mm. Stigma narrow, about 6.6 (6.4–6.7)× as long as wide and about 2.5 (2.1–2.8)× as long as distal abscissa of R1. Veins m-cu and 2RS visible, 2RS sometimes colour- less in second half. Veins r and 3RS distinct.

Metasoma. Petiole about 2.1 (2–2.3)× as long as wide at spiracles. Dorsal disc of petiole moderately rugose, with one irregular carina medially and with 5–6 long setae on each side.

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

Hosts: Acyrthosiphon pisum (Harris) , Amphorophora rubitoxica , Illinoia grindeliae (Williams) , I. liriodendri (Monell) , Macrosiphum californicum (Clarke) , M. euphorbiae (Thomas) , Myzus ornatus Laing , M. persicae , Rhopalosiphum padi , Sitobion fragariae .

Distribution. Nearctic

Revision of the genus Monoctonia Starý with a description of a new species and redescriptions of known species is given in Rakhshani et al. (2015).

Figures

FIGURE 7. Propodeum, females. a—F. pseudoplatani; b—H. angustivalva; c—M. caricis; d—M. crepidis; e—M. ligustri; f—M. mali; g—M. nervosus; h—M. paulensis.

FIGURE 8. Fore wing, females. a—F. pseudoplatani; b—H. angustivalva; c—M. caricis; d—M. crepidis; e—M. ligustri; f—M. mali; g—M. nervosus; h—M. paulensis.

FIGURE 9. Ovipositor sheaths. a—F. pseudoplatani; b—H. angustivalva; c—M. caricis; d—M. crepidis; e—M. ligustri; f—M. mali; g—M. nervosus; h—M. paulensis.