Mischocyttarus napoensis Richards 1978

Borges, Rafael Cabral & Silveira, Orlando Tobias, 2019, Revision of the species-group of Mischocyttarus (Omega) filiformis (de Saussure 1854), with description of three new species (Hymenoptera, Vespidae), Zootaxa 4657 (3), pp. 545-564 : 555-556

Mischocyttarus napoensis Richards 1978

( Figs 10, 11 , 16 )

Mischocyttarus (Monacanthocnemis) napoensis Richards, 1978: 373 . Holotype: ♀, Ecuador, Napo, 15–18.xii.1971 (M. Cooper) (NHM); examined

Mischocyttarus (Omega) napoensis: Silveira, 2008: 517

Diagnosis. Female. Fore wing length 7.6 mm (8.0mm in Richards 1978). Humeral lobes small and rather round; first metasomal segment short for this species-group ( Figs 10, 11 ), length less than [mesoscutum + scutellum + metanotum], spiracles not prominent; overall color yellow, mesopleuron with strong dark brown to blackish mark near posterior margin and scrobe, and a large diffuse light brown mark anteriorly; hind trochanter and most of hind femur and tibia, and hind tarsus entirely black to dark brown; most of metasomal terga light testaceous with narrow yellow marginal bands.

Redescription. Female. Wing length 7.6 mm (8.0mm in Richards 1978). Head as high as wide in frontal view ( Fig. 16 ), FHH/IntOW 1.05; clypeus about as high as wide, H/WCLP 1.04; apex narrowly truncate; malar space very narrow; tentorial pit much closer to eye than to antennal socket; antennal scape moderately elongated, L / Wesc 2.8; posterior occeli widely separated; POL more than two diameters; POL/OOL 1.63; occipital carina well developed, distinct in lateral view and ending below the level of ocular sinus; gena considerably narrower than upper lobe of the eye; pronotum without a lateral fovea; anterior margin of pronotum with lamella raised and reflexed, in profile as a lip turned backwards in more than 180 degrees; region immediately behind the lamella without secondary margin; humeral angle well developed WCAR/WMS 1.14; pronotal carina high, forming comparatively smaller round humeral lobes, middle section distinctly straight ( Fig. 11 ); mesoscutum about as long as wide L/WMS 1.0; hind tarsi with asymmetric claws, inner claw longer, with apex uniformly rounded, but not enlarged or spoon-shaped; propodeum with median furrow shallow, developed on more than 4/5 of the length of propodeal dorsum, propodeal valve expanded below in lateral view, with triangular outline; first metasomal segment short, regularly widening from base to apex ( Figs 10, 11 ), which is ca. 1.72 × wider than base; LSI/HMP 1.13; spiracles not prominent.

Color. Yellow. Antenna above; upper interantennal area extending to ocular sinus and frons, vertex and occiput, except for two triangular yellow marks adjoining eyes; anterior face of pronotum; mesoscutum, except for two median longitudinal stripes; large humeral mark; scrobe and upper posterior area of mesopleuron, posterior triangular mark on scutellum; posterior stripe on hind coxa; hind trochanter; most of hind femur; hind tibia and tarsi, dark brown to blackish; large mark on mesopleuron, light brown; disk of most metasomal terga (with narrow marginal yellow bands), light testaceous; wings hyaline with brown veins.

Male. Unknown.

Nest. Unknown.

Geographic distribution. ECUADOR: Napo. (see Fig. 34 )

Remarks. No new records exist of this species, which appears to be restricted to the northwestern portion of South America.

Examined material. Only the holotype cited above.

Figures

FIGURE 34. Partial truncated map of South America with distributions of species of the M. filiformis group. Embedded frame box shows enlarged area representation with the records of M. filiformis, M. omicron, M. asahi sp. nov., M. kallindusfloren sp. nov. and M. nazgul sp. nov. within the Carajás National Forest (FLONA) in southeastern Pará state.

FIGURES 6–13. General dorsal or lateral body views (females; all from Brazil, except 10 and 11). 6 a-b: holotype of M. filiformis (NHM); 7: same species (Pará, Belém, Utinga; MPEG); 8: holotype of M. omicron (NHM); 9: M. buyssoni (R. de Janeiro; MPEG); 10–11: holotype of M. napoensis (Ecuador; NHM); 12: holotype of M. kallindusfloren sp. nov. (Pará, Carajás; MPEG); 13: holotype of M. asahi sp. nov. (Pará, Carajás; MPEG). all scales = 1.00 mm.

FIGURES 14–20. Head in frontal view (except 17, posterior view) (females; all from Brazil, except 14 and 16) 14: M. filiformis (Bolivia, Beni; NHM); 15 and 17: M. omicron (Pará, Carajás; MPEG); 16: holotype of M. napoensis (Ecuador; NHM); 18: holotype of M. kallindusfloren sp. nov. (Pará, Carajás; MPEG); 19: holotype of M. asahi sp. nov. (Pará, Carajás; MPEG); 20: M. buyssoni (R. de Janeiro; MPEG); all scales = 0.50 mm. Figure 21: colony and nest of M. filiformis (Pará, Belém; campus of MPEG)—nest size 1,5 × 1,2 cm.