Acrotaphus guacas Álvarez-Arellano, 2025

Acrotaphus guacas Álvarez-Arellano , sp. nov.

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( Figs 2A–D View FIGURE 2 and 3 View FIGURE 3 )

Diagnosis. This species can be distinguished from all other species of Acrotaphus by the combination of the following characters: 1) lower face 0.5–0.6 × as broad as high; 2) gena flat behind the eyes; 3) posterior ocelli separated from eyes by 0.1–0.2 × its diameter in dorsal view; 4) fore wing blackish with one yellowish band extending backwards from anterior margin, just proximal to the pterostigma to the encounter of cu-a to base of the Rs&M; 5) tarsal claw with basal lobe quadrangular, with claw apex slightly overtaking the posterior margin of lobe; 6) mid leg orange with slightly infused tarsi and hind leg with orange coxa, infuscated trochantellus and the rest black; 7) metasoma with tergite I slightly darker than the color of the mesosoma and getting darker from tergite II towards a dark brown; 8) ovipositor slender, 1.6 × as long as hind tibia.

Description. Female. Body [12.0] 12.0–15.0 mm. Head. Lower face [0.6] 0.5–0.6 × as broad as high (from supraclypeal suture to base of antenna), flat, with scattered punctures which bear long conspicuous bristles; head in dorsal view with margin of the gena flat behind the eyes; margin of gena [0.6] 0.5–0.6 × length of eye in dorsal view; posterior ocelli separated from eyes by [0.1] 0.1–0.2 × its diameter in dorsal view. Mesosoma. Pronotum moderately long, smooth and polished, with distance from tegula to head greater than [0.4] 0.4–0.5 × distance from tegula to hind margin of propodeum; mesoscutum smooth and polished, with notaulus weakly marked; scutellum in dorsal view triangular; mesopleuron polished, with fine bristles anteriorly and ventrally; epicnemial carina present ventrally, extending until reaching the level of the lower corner of the pronotum laterally; metapleuron polished, with sparse, fine bristles evenly spaced and with a strongly longitudinal groove in lower part below spiracle; propodeum smooth dorsally, laterally with scattered fine bristles. Fore wing [9.0] 9.0– 12 mm; cu-a opposite to the base of Rs&M; 2rs-m [0.7] 0.7–0.8 × as long as abscissa of M between 2rs-m and 2m-cu; hind wing with abscissa of Cu1 between M and cu-a [1.2] × length of cu-a. Tarsal claw with basal lobe quadrangular, with claw apex slightly overtaking the posterior margin of lobe. Metasoma. Tergite I [1.6] × as long as posteriorly broad; tergite II [1.5] × as long as posteriorly broad; tergite III [1.5] × as long as posteriorly broad; tergites IV–V [1.3] × as long as posteriorly broad; ovipositor slender, [1.6] × as long as hind tibia; ovipositor sheath [1.3] × as long as hind tibia; lower valve with slightly swelling in the base and mid region.

Coloration. Head black, except apical margin of clypeus slightly yellowish, mouthparts yellowish, except apex of mandible black; antenna dark brown. Mesosoma entirely reddish orange and metasoma with tergite I slightly darker than the color of the mesosoma and getting darker from tergite II towards a dark brown. Anterior leg orange, mid leg orange with slightly infused tarsi and hind leg with orange coxa, infuscated trochantellus and the rest black. Fore wing blackish with one yellowish band extending backwards from anterior margin, just proximal to the pterostigma to the encounter of cu-a to base of the Rs&M; hind wing black with apex yellowish; pterostigma yellowish. Ovipositor reddish to brownish.

Male. Unknown.

Type material: Holotype: 1♀, COLOMBIA, Risaralda, Santa Rosa de Cabal, Vereda Guacas , Finca Mirador Oliva., 1706 m.a.l.s., 4.896 4, -75.6187., 28-dec-2022., Direct capture., coll. Álvarez-Arellano D., (CUS-E H-0944) . Paratypes: 5 ♀, COLOMBIA: same location type, but; 28-nov-2022., (CUS-E H-0942); 02-jan-2023., (CUS-E H-0943); 02-oct-2024., (CUS-E H-1222); 13-oct-2024., (CUS-E H-1252); 08-oct-2024., (CUS-E H-1254) .

Distribution. Colombia, only known in the department of Risaralda ( Fig. 3 View FIGURE 3 ).

Biological notes. Host unknown. All individuals in this study were collected at night by the first author.

Etymology. The specific name (in apposition) refers to the type locality, Vereda Guacas, in the municipality of Santa Rosa de Cabal, Risaralda.

Comments. Acrotaphus guacas Álvarez-Arellano , sp. nov. closely resembles A. cuzconus Pádua & Sääksjärvi, 2020 and A. monotaenius Pádua, 2020 mainly by having fore wing blackish with one yellowish band extending backwards from anterior margin, just proximal to the pterostigma to the encounter of cu-a to base of the Rs&M, but differs from it mainly by the mid leg orange with slightly infused tarsi and hind leg with orange coxa, infuscated trochantellus and the rest black, metasoma with tergite I slightly darker than the color of the mesosoma and getting darker from tergite II towards a dark brown (mid leg entirely black and metasoma entirely reddish orange, in A. cuzconus ; mid leg entirely orange and metasoma entirely black in A. monotaenius ).