Acrotaphus dolichopus 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 : 20-22

Acrotaphus dolichopus Pádua sp. n.

( Figs 53–56 )

Diagnosis. This species can be distinguished from all other species of Acrotaphus by the combination of the following characters: 1) posterior ocelli separated from eyes by 0.4–0.6× its diameter in dorsal view; 2) fore wing yellowish hyaline with two black bands; 3) tarsal claw with basal lobe longitudinally elongated, with claw apex clearly overtaking the posterior margin of lobe.

Description. Female. Body [10.6] 10.5–14.0 mm. Head. Lower face [0.9] 0.9–1.0× 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 [0.4]× length of eye in dorsal view; posterior ocelli separated from eyes by [0.4] 0.4–0.6× its diameter in dorsal view. Mesosoma. Pronotum moderately long, smooth and polished, with distance from tegula to head greater than [0.5] 0.5–0.6× 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 [9.5] 9.5–11.0 mm; cu-a opposite to the base of Rs&M; 2 rs-m [0.6] 0.6–0.7× 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 [0.8] 0.8–1.3× length of cu-a. Tarsal claw with basal lobe longitudinally elongated, with claw apex clearly overtaking the posterior margin of lobe. Metasoma. Tergite I [1.5] 1.3–1.6× as long as posteriorly broad; tergite II [1.1] 1.1–1.5× as long as posteriorly broad; tergite III [1.0] 1.0–1.3× as long as posteriorly broad; tergites IV–V [0.85] 0.85–1.2× as long as posteriorly broad; ovipositor slender, [1.6] 1.5–1.8× 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 orange, mouthparts orange, except apex of mandible black; antenna brownish. Mesosoma entirely orange. Metasoma orange with posterior margins of tergites II–IV black and tergites VI+ black. Anterior and mid leg entirely orange, 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 orange and sheath dark brown.

Male. Unknown.

Variation. Three females from Panama (one specimen) and French Guiana (two specimens) with pronotum black, except its apical margin; metasoma orange, with posterior margin black in the tergite IV and tergites V+ black; pronotum orange, except anterior part black; and metasoma with tergites VI+ black. We think they are conspecific, but we are not treating them as paratypes.

Type material: Holotype: ♀, BRAZIL, SP [= São Paulo], Luiz Antônio, Est. [=Estação] Ecológica de Jataí , Mata ciliar, Pont I, 21°36’47’’S / 47°49’04’’O, 29.iv.2009, Light trap ( R.I. R. Lara and team cols.), APTA . Paratype: Brazil: same location type, but Pont II, 15.x.2009, ♀, APTA .

Other material examined: French Guiana: 33 Km SE Roura on Kaw Rd., 04°34.135’N / 052°11.150’W, 227 m., MV Light , 16–17.iv.2007 (D.G. Hall & J.E. Eger cols.), ♀, FSCA ; idem, but Amazone Nature Lodge , 30 Km SE Roura on Kaw Rd., 04°33.570’N / 052°12.433’W, 300 m. , 10–18.iv.2007, ♀, FSCA . Panama: Barro Colorado I [=Island], Canal Zone , 29.vii.1956 (C.W. & M.E. Rettenmeyer cols.), ♀, CNC .

Distribution. Brazil, French Guiana and Panama ( Fig 57 ).

Biological notes. Host unknown.

Etymology. The specific name come from Greek “dolicho” =long + “pus” =footh, referring to the basal lobe in the tarsal claw being longitudinally elongated.

Comments. Acrotaphus dolichopus sp. n. closely resembles A. nambilloensis sp. n. mainly by having tarsal claw with basal lobe longitudinally elongated, with claw apex clearly overtaking the posterior margin of lobe. It differs from it mainly by having posterior ocelli separated from eyes by 0.4–0.6× its diameter in dorsal view (posterior ocelli separated from eyes by 0.2× its diameter in dorsal view, in A. nambilloensis sp. n.).

Figures

FIGURES 53–57. Acrotaphus dolichopus sp. n., ♀ (holotype): 53, habitus; 54, head, dorsal view; 55, face, frontal view; 56, tarsal claw, scale bar =0.2 mm. 57. Distribution of Acrotaphus dolichopus sp. n. in the Neotropical region.