Mnioes isqun, Ballon-Estacio & Alvarado, 2024

Ballon-Estacio, Ricardo & Alvarado, Mabel, 2024, Three new species of parasitoid wasps of the genus Mnioes Townes, 1946 (Ichneumonidae: Banchinae) in a humid forest in Peru, Zootaxa 5523 (2), pp. 269-283 : 279-281

Mnioes isqun sp. nov.

( Fig. 5 )

Material examined. Holotype: ♀ “ PERÚ:AY. La Mar , Moyabamba 13°5’15.8”S / 73°30’33.0”W 1847m 20.xii.2022 M. Alvarado “café bajo sombra” T. Malaise 7” ( MUSM).

Paratypes: 1♀ and 1♂ forest, 06.XII.2022, Malaise // 1♀ MUSM-HYM 0367 , 1♂ MUSM-HYM 0415 [leg removed, COI obtained]; 1♀ forest, 09.XI.2022, Malaise // 1♀ MUSM-HYM 0371 [leg removed, COI obtained]; 2♀♀ and ♂ shaded-coffee plantation, 20.XII.2022, Malaise // 1♀ MUSM-HYM 0364 , 1♀ MUSM-HYM 0428 , 1♂ MUSM-HYM 0365 [leg removed, COI obtained]; 1 ♀ monoculture of coffee plantation, 25.X.2022, Malaise // 1♀ MUSM-HYM 0354 [leg removed, COI obtained]; ♀ monoculture of coffee plantation, 06.XII.2022, Malaise // 1♀ MUSM-HYM 0375 [leg removed, COI obtained] ( MUSM).

Diagnosis: Mnioes isqun sp. nov. can be distinguished from its female congeners by the following combination of traits: antenna black with a white dorsal band; lower face entirely black; frons with a small median lateral brown or yellow marks; pronotum (rarely with a minute yellow anterolateral spots), propodeum, mesoscutum and scutellum entirely black; metasoma predominantly black; fore wing infumate. It can be distinguished from its male congeners by the following combination of traits: fore wing softly infumate without patches and meso- and metapleuron predominantly black, at most with two off-white small maculae on mesopleuron and one in metapleuron.

Description of the female holotype: Fore wing length 9.2 mm

Head: Face granulate-punctate and weakly polished, 0.7× as long as wide; clypeus granulate with scattered punctures, 2.1× as wide as long; malar space 0.7× as long as basal mandibular width; lateral ocellus separated from compound eye by about 1.6× maximum ocellar diameter; distance between ocelli 1.5× maximum ocellar diameter; scape with truncated section V-shaped, with 48 flagellomeres, ratio of length from second to fourth flagellomeres: 2.9:2.6: 2.6, subapical flagellomere 1.2× as long as centrally broad.

Mesosoma: Granulate-punctate and weakly polished; notaulus vestigial, weakly impressed anteriorly; subalar prominence low and weakly rounded. Propodeum ( Fig. 5E ) granulate-punctate; declivous from anterior margin; with a weak vestige of posterior transverse carina only centrally; pleural carina present. Fore wing with vein 1m-cu with a ramellus; vein 2m-cu weakly sinuate with two bullae and a spurious vein; 2rs-m 5.3× as long as abscissa of M between 2rs-m and 2m-cu. Hind wing with length of abscissa of Cu1 between Cu1 and 1A 0.2× as long as length of vein Cu1 between M and Cu1.

Metasoma ( Fig. 5A ): Metasomal tergites granulate, matte; tergite I 2.7× as long as posteriorly wide; tergite II 1.4× as long as posteriorly wide; ovipositor sheath 2.1× as long as metathoracic tibia.

Colour: Head ( Figs 5A, 5D ) predominantly black; lower half of clypeus off-white; mandible and palpi dark brown; small macula on frontal orbit black ( Fig. 5D ); antenna black, apical third of flagellomere 8, flagellomeres 9–16 ventrally white. Mesosoma predominantly black, with humeral plate anteriorly off-white. Foreleg reddish with outer base of coxa, trochantellus, and tarsomeres brown. Mid leg reddish with trochantellus, distal end of femur, tibia, and tarsomeres dark brown. Metathoracic leg with coxa, trochanter, and base of trochantellus reddish; trochantellus, femur, tibia, basal 2/3 of length of basitarsus, distal 2/3 of length tarsomere 4, and tarsomere 5 black; distal 1/3 of length of basitarsus, tarsomeres 2 and 3, and proximal third of tarsomere 4 white. Wings evenly infuscate. Metasomal tergites black with proximal 1/3 of tergite I reddish; distal of tergites V-VII brown. Ovipositor sheath dark brown.

Variation of female paratype. Fore wing length 9.5–10.5 mm. They differ from the holotype in the following features: clypeus 2.1–2.3× as wide as long; malar space 0.7–0.8× as long as basal mandibular width; lateral ocellus separated from compound eye by about 1.3–1.4× maximum ocellar diameter; distance between ocelli 1.1–1.2× maximum ocellar diameter; antenna with 46–49 flagellomeres, ratio of length from second to fourth flagellomeres: 3.0–3.1:2.6–2.8:2.6–20.8, subapical flagellomere 1.0–1.2× as long as centrally broad; vein 2rs-m 5.7–6.0× as long as abscissa of M between 2rs-m and 2m-cu; hind wing with length of abscissa of Cu1 between Cu1 and 1A 0.2× as long as length of vein Cu1 between M and Cu1; tergite I 2.4–2.8× as long as posteriorly wide; tergite II 1.2–1.5× as long as posteriorly wide; ovipositor sheath 2.0–2.1× as long as metatibia. Within the colouration: Antenna black but with variation on the number of flagellomeres the ventral white band, in some individual with flagellomere 8 apically or completely, flagellomere 16 basally or completely white. Pronotum with minute off-white anterolateral spots. Foreleg entirely brown, or entirely black, or predominantly reddish with trochantellus, tarsomeres, outer base of coxa, and base of femur brown. Mid leg entirely brown, entirely black, or predominantly reddish with trochantellus, distal end of femur, tibia, tarsomeres brown. Hind leg predominantly black; rarely coxa black with extreme base reddish, trochanter ranging between entirely reddish to entirely black; trochantellus ranging from only distal end black to entirely black, rarely femur basal end reddish or usually entirely black; distal 1/3 to 1/4 of basitarsus length white. Metasomal tergite I from completely black to anterior 1/3 of length reddish.

Male. Fore wing length 8.9–9.6 mm. The male individuals ( Figs 5B, 5C ) differ from the females in the following features: clypeus 1.9–2.1× as wide as long; lateral ocellus separated from compound eye by about 1.2× maximum ocellar diameter; distance between ocelli 1.0–1.1× maximum ocellar diameter; antenna with 49–51 flagellomeres, ratio of length from second to fourth flagellomeres: 3.6–3.7:3.4–3.6:3.4–3.6, subapical flagellomere 2.3× as long as centrally broad; pleural carina distinct along its length; fore wing with vein 1m-cu with a ramellus, vein 2m-cu with one long bulla, with a spurious vein unpigmented, 2rs-m 2.2–4.0× as long as abscissa of M between 2rs-m and 2m-cu; tergite I 3.9–4.1× as long as posteriorly wide; tergite II 1.4–1.5× as long as posteriorly wide.

Male (colour): Head ( Figs 5B, 5C ) black but face ( Fig. 5C ) off-white with vertical central black mark; mandible entirely off-white or off-white with distal half testaceous; labial palp and maxillary palp off-white with segments 3– 5 or only 4–5 brown; frontal orbits, scape ventrally, and scape ventrally off-white; antenna black with flagellomeres 14–21 dorsally white. Mesosoma predominantly black, anterior margin and distal postero-dorsal corner of pronotum, subalar prominence, postero-dorsal corner of mesopleuron, proximal half of humeral plate, distal margin of tegula, scutellum, and in one individual with two soft maculae on mesopleuron and one in metapleuron ( Fig. 5B ) off-white; propleuron testaceous in one individual and black in the other one. Foreleg entirely dark brown or testaceous with tarsomeres brown. Midleg entirely dark brown or reddish with tibia and tarsomeres brown. Hind leg black with distal 1/6 of the length of basitarsus and tarsomeres 2–4 white or reddish with half of femur, tibia, basal 5/6 of length of basitarsus and tarsomere 5 black; distal 1/6 of the length of basitarsus and tarsomeres 2–4 white. Wings evenly and softly infumate. Metasomal tergites ( Fig. 5F ) black with or without basal 1/3 of tergite I and anterior margin of tergites II and III reddish; distal margin (centrally) of tergites V–VII or only VI and VII white.

Comments. This species was found in all three habitats, primary forest, shaded coffee, and unshaded coffee, between the months of October and January and only collected with Malaise Traps, showing that its occurrence is not affected by the preservation state of its habitat.

Distribution. This species was collected in cloud forest in Moyabamba, La Mar, Ayacucho.

Etymology. The specific epithet “ isqun ” means nine in Quechua language. It is treated as a noun in apposition.

Figures

FIGURE 5. Details of Mnioes isqun sp. nov. (paratypes) A. Habitus of female (scale bar = 1 mm), B. Habitus of male (scale bar = 1mm), C. Facial view of male, D. Facial view of female, E. Propodeum of female, F. First two metasomal tergites of male.