Acrotaphus nambilloensis 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 : 47-48

Acrotaphus nambilloensis Pádua sp. n.

( Figs 171–174 )

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 flat in dorsal view; 2) posterior ocelli separated from eyes by 0.2× its diameter in dorsal view; 3) metasoma orange with tergites V+ black; 4) tarsal claw with basal lobe longitudinally elongated, with claw apex clearly overtaking the posterior margin of lobe.

Description. Female. Body [17.5] mm. Head. Lower face [0.9]× 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 concave behind eyes; margin of gena [0.5]× length of eye in dorsal view; posterior ocelli separated from eyes by [0.2]× its diameter in dorsal view. Mesosoma. Pronotum moderately long, smooth and polished, with distance from tegula to head greater than [0.3]× 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 [14.6] mm; cu-a opposite to the base of Rs&M; 2 rs-m [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 [1.2]× length of cu-a. Tarsal claw with basal lobe longitudinally elongated, with claw apex clearly overtaking the posterior margin of lobe. Metasoma. Tergite I [1.8]× as long as posteriorly broad; tergite II [1.6]× as long as posteriorly broad; tergite III [1.45]× as long as posteriorly broad; tergites IV–V [1.25]× as long as posteriorly broad; ovipositor slender, [1.6]× 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 dark brown. Mesosoma orange. Metasoma orange with tergites V+ black. Anterior and mid leg entirely orange, hind leg orange with femur, tibia and tarsus 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 brownish, except apex orange and sheath dark brown.

Male. Unknown.

Type material: Holotype: ♀, ECUADOR, Pichincha, Nambillo Valley near Mindo , 1450 m., 09.vi.1987 (M. Cooper col.), #2005-152, BNHM.

Distribution. Ecuador ( Fig 175 ).

Biological notes. Host unknown.

Etymology. The specific name refers to the type locality Vale Nambillo, Pichincha, Ecuador.

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

Figures

FIGURES 171–175. Acrotaphus nambilloensis sp. n., ♀ (holotype): 171, habitus; 172, head, dorsal view; 173, face, frontal view; 174, tarsal claw, scale bar =0.2 mm. 175. Distribution of Acrotaphus nambiolloensis sp. n. in the Neotropical region.