Leurus angustignathus Herrera, 2011a

Moleiro, Henrique Pereira, Onody, Helena Carolina, Camacho, Gabriela Procópio, Penteado-Dias, Angélica Maria, Alvarado, Mabel, Ballón-Estacio, Ricardo Javier & Santos, Alvaro Doria dos, 2023, Contributions to the taxonomy of the Brazilian Leurus Townes, 1946 (Hymenoptera: Ichneumonidae, Metopiinae), Papéis Avulsos de Zoologia 63, pp. 1-13 : 3-5

Leurus angustignathus Herrera, 2011a

( Figs. 1-7 ; 35 )

Type material: Holotype ♂ ( DCBU) Brazil, São Paulo, Jundiaí, Serra do Japí, 20.x.2007, Malaise , Sobczak, J.F. col. (high resolution images examined).

Material examined: 01 ♀ ( MZSP 91980 ), Brazil: São Paulo, São Paulo, Municipal Park M’Boi Mirim ( Brejo ), 23°42′24.5″S, 46°46′48.0″W, Malaise, 30.v-04.vii.2020, H.P. Moleiro ; A.D. Santos & F.Z. Ferreira cols. (*); 01 ♀ ( MZSP 23084 ), Salesópolis, Biological Station Boraceia, Divisor Trail , 23°39′22.9″S, 45°53′48.1″W, Malaise, pt. 10, 18-28. iv.2003, A.P. Aguiar, F.M. Rodrigues & cols. (*) ; 01 ♀ ( MZSP 23085 ), same data as MZSP 23084 except Pilões Trail , 23°39′S 45°05′W Malaise, pt. 03 .

Diagnosis: mandible evenly tapered from base to apex; antenna with 22-23 flagellomeres; scapus and pedicel brownish; tegula brownish; fore wing without areolet; tergite I narrowed anteriorly and with poorly developed lateromedial longitudinal carina extending to about 0.3× of the segment length; lateromedial longitudinal carina united after the posterior transverse carina.

Description: Female

Head: Face slightly convex, with a raised point at the base of the antenna ( Fig. 1 ); clypeus uniformly convex, not apically flattened; mandible tapered from base to apex, with rounded distal apex; mandible with two teeth ( Figs. 2, 3 ); malar space (0.15-0.20 mm) the same width of the base of the mandible; palp formula 5:3; antenna with 22 flagellomeres, with homogeneous pilosity; eye emarginated; face with erect and sparse setae.

Mesosoma: In lateral view pronotum and metapleuron shinny; in dorsal view, pronotum finely punctuat- ed; mesopleuron finely punctuated; propodeum with strong lateromedial longitudinal carina, parallel, converging in the petiolar area to merge with the posteri- or transverse carina ( Fig. 4 ); posterior transverse carina complete; submetapleural carina small, expanding anteriorly into a very small, rounded, smooth lobe; fore wing 4.20-5.00 mm; fore wing with areolet absent; hind wing with distal vein abscissa Cu1 very weak, almost spectral, joining cu-a, closer to 1A than M; pilosity sparse, greater concentration on dorsum of mesosoma, lateral of propodeum, legs and anterior region of mesopleuron.

Metasoma: Tergite I narrowed anteriorly and with poorly developed lateromedial longitudinal carina extending to about 0.3× of segment length ( Fig. 5 ); tergite II 1.50× as long as posteriorly broad, with close punctures; tergite II with small and inconspicuous laterotergites ( Fig. 7 ); tergite III ending with progressively broader with weakly sclerotized laterotergites; ovipositor short, about 0.75 mm, equivalent to 0.70× the length of posterior femur; ovipositor sheaths 0.86× the length of the ovipositor; ovipositor without a notch.

Coloration: Body predominantly black with yellow or hyaline pilosity ( Fig.6 ); palps yellowish;mandible black with reddish brown teeth; scape and pedicel and the first flagellomeres orangish brown ranging to dark brown from mid to apex; tegula light brown; fore, mid and hind coxa black; fore femur orangish brown; fore tibia light brown at the base and orangish brown near apex to tarsal claws; mid trochanter and femur reddish brown; mid tibia bicolor whitish at the base and black near apex; mid tarsi black but basitarsus basally light-brown; hind trochanter and trochantellus reddish brown; hind femur black; hind tibia whitish on the first half close to the base and black on the half close to the apex; hind basitarsus with the same pattern as tibia; remaining tarsomeres black; wings slightly tinged with yellow; with brownish pterostigma and veins; metasomal tergites black; laterotergites and sternites reddish brown; ovipositor orangish brown.

Distribution ( Fig. 35 ): São Paulo state.

Comments: L. angustignathus differs from L. xalifer in having lateromedial longitudinal carina fused with the posterior transverse carina (vs. not fused and faint); differs from L. caeruliventris in having tergite I with poorly developed lateromedial longitudinal carina, about 0.30× the segment length (vs. extending beyond center of tergite); and differs from L. eraticus in having 22-25 flagellomeres (vs. 19 flagellomeres). The female of L. angustignathus differs from the male in having antenna with 22 flagellomeres (vs. 25 flagellomeres) and a larger fore wing length of 4.20-5.00 mm (vs. 3, 80 mm). Females are very similar to males in color.

Figures

Figures 1-7. Leurus angustignathus, Female. (1) Face in frontal view. (2, 3) Detail of the mandible, with the presence of the ventral lobe short, in frontal view. (4) Lateromedial longitudinal carina of propodeum in dorsal view. (5) Lateromedial longitudinal carina in the first metasomal tergite in dorsal view. (6) Habitus. (7) Metasoma in ventral view.Scale bars:200 μm (1), 100 μm (2), 100 μm (3),200 μm (4), 200 μm (5),1.0 mm (6) and 500 μm (7).

Figures 35-36. Map of known distribution occurrences of Leurus in Brazil. (35) L.angustignathus.(36) L.caeruliventris.