Acrotaphus pseudomexicanus Pádua, 2020

Pádua, Diego G., Sääksjärvi, Ilari E., Monteiro, Ricardo F. & Oliveira, Marcio L., 2020, Review of the New World genus Acrotaphus Townes, 1960 (Hymenoptera: Ichneumonidae: Pimplinae), with descriptions of fifteen new species, Zootaxa 4719 (1), pp. 1-62 : 51-52

Acrotaphus pseudomexicanus Pádua sp. n.

( Figs 186–189 )

Diagnosis. This species can be distinguished from all other species of Acrotaphus by the combination of the following characters: 1) margin of gena behind eyes concave in dorsal view; 2) posterior ocelli separated from eyes by 0.3–0.5× its diameter in dorsal view; 3) occipital carina forming a narrow “neck”; 4) hind leg entirely black; 5) ovipositor slender, 1.5–1.6× as long as hind tibia.

Description. Female. Body [15.5] 11.5–15.5 mm. Head. Lower face [0.7] 0.7–0.8× 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 gena strongly concave behind eyes; margin of gena [0.35] 0.35–0.5× length of eye in dorsal view; posterior ocelli separated from eyes by [0.3] 0.3–0.5× its diameter in dorsal view; occipital carina forming a narrow “neck”. Mesosoma. Pronotum moderately long, smooth and polished, with distance from tegula to head greater than [0.6] 0.6–0.8× 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 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 [11.0] 9.0–11.0 mm; cu-a opposite to the base of Rs&M; 2 rs-m [0.8] 0.75–0.8× as long as abscissa of M between 2 rs-m and 2 m-cu; hind wing with abscissa of Cu 1 between M and cu-a [1.1] 0.9–1.1× length of cu-a. Tarsal claw with basal lobe quadrangular, with claw apex slightly overtaking the posterior margin of lobe. Metasoma. Tergite I [1.75] 1.3–1.9× as long as posteriorly broad; tergite II [1.35] 1.35–1.5× as long as posteriorly broad; tergite III [1.2] 1.2–1.3× as long as posteriorly broad; tergites IV–V [1.2] 1.2–1.4× as long as posteriorly broad; ovipositor slender, [1.5] 1.5–1.6× as long as hind tibia; lower valve with slightly swelling in the base and mid region.

Coloration. Head black with anterior margin of clypeus orange, mouthparts orange, except apex of mandible black; antenna brownish. Mesosoma entirely orange. Metasoma orange with tergites V+ black.Anterior and mid leg entirely orange, the hind leg entirely black. Wings yellowish; fore wing with apex distal to 2 rs-m black, and with a black median band extending backwards from anterior margin, just proximal to the pterostigma, right through the 1 st subdiscal cell; pterostigma yellowish. Ovipositor and sheath dark brown.

Male. Unknown.

Type material: Holotype: ♀, BRAZIL, Amazonas, Reserva Ducke, Igarapé Uberé, vi.2003, Malaise (J.M. Ri- beiro & J. Vidal col.), INPA . Paratypes: Brazil: Amazonas, Manaus, Reserva Ducke , Igarapé Ipiranga , 13.i.2003, Malaise (J.M.F. Ribeiro & J. Vidal col.), ♀, INPA . Colombia: Meta, PNN [=Parque Nacional Naturale] Sierra de La Macarena, Caño Curía, Parcela , 03°21’N / 73°56’W, 460 m., Malaise, 10–21.xii.2002 (M. Duarte leg.), M.2979 [?], #52993, IAVH .

Distribution. Brazil and Colombia ( Fig 190 ).

Biological notes. Host unknown.

Etymology. The specific name refers to the similarity with A. mexicanus (Cameron, 1886) .

Comments. Acrotaphus pseudomexicanus sp. n. closely resembles A. mexicanus mainly by having last metasomal tergites black and posterior ocelli separated from eyes by 0.25–0.3× its diameter in dorsal view and ovipositor slender. It differs from A. mexicanus by having margin of gena behind eyes strongly concave (margin of gena behind eyes flat, in A. mexicanus ).

Figures

FIGURES 186–190. Acrotaphus pseudomexicanus sp. n., ♀ (holotype): 186, habitus; 187, head, dorsal view; 188, face, frontal view; 189, tarsal claw, scale bar =0.2 mm. 190. Distribution of Acrotaphus pseudomexicanus sp. n. in the Neotropical region.