Acrotaphus micrus 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 : 43-45

Acrotaphus micrus Pádua sp. n.

( Figs 161–164 )

Diagnosis. This species can be distinguished from all other Acrotaphus by the combination of the following characters: 1) margin of gena behind eyes convex in dorsal view; 2) posterior ocelli separated from eyes by 0.6× its diameter in dorsal view; 3) mesosoma orange with pronotum black, except its distal half orange and metapleuron black; 4) metasoma orange with tergites V+ black; 5) ovipositor slender, 1.5× as long as hind tibia.

Description. Female. Body [5.8] mm. Head. Lower face [1.1]× 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 convex behind eyes; margin of gena [0.6]× length of eye in dorsal view; posterior ocelli separated from eyes by [0.6]× its diameter in dorsal view. Mesosoma. Pronotum moderately long, smooth and polished, with distance from tegula to head greater than [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 [5.5] mm; cu-a opposite to the base of Rs&M; 2 rs-m [0.6]× 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]× length of cu-a. Tarsal claw with basal lobe quadrangular, with claw apex slightly overtaking the posterior margin of lobe. Metasoma. Tergite I [1.35]× as long as posteriorly broad; tergite II [1.1]× as long as posteriorly broad; tergite III [1.0]× as long as posteriorly broad; tergites IV–V [1.0]× as long as posteriorly broad; ovipositor slender, [1.5]× as long as hind tibia; lower valve with slightly swelling on the base and mid region.

Coloration. Head black, except apical margin of clypeus slightly yellowish, mouthparts orange, except apex of mandible black; antenna dark brown. Mesosoma orange, with pronotum black, except distal half orange and metapleuron black. Metasoma orange with tergites V+ black. Anterior and mid leg orange, except mid coxa black, 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 yellowish and sheath dark brown.

Male. Unknown.

Type material: Holotype: ♀, BRAZIL, MG [= Minas Gerais], São Gonçalo do Rio Abaixo, Estação Ambiental Peti / CEMIG, 19°53’14’’S / 43°22’06’’W, 12.vii.2002 (A.F. Kumagai col.), #1500545, UFMG.

Distribution. Brazil ( Fig 165 ).

Biological notes. Host unknown.

Etymology. The specific name come from the Greek word “micro” =small, referring to the small size of the type-specimen.

Comments. Acrotaphus micrus sp. n. closely resembles A. kourou sp. n. mainly by having the margin of gena convex behind eyes in dorsal view, posterior ocelli separated from eyes by 0.6× its diameter in dorsal view and metapleuron and mid coxa black. It differs from it by having mesosoma orange with pronotum black, except its distal half orange and metapleuron black and ovipositor slender, 1.5× as long as hind tibia (mesosoma black, except tegula, scutellum, postscutellum and posterior region of propodeum orange and ovipositor slender, 1.2× as long as hind tibia, in A. kourou sp. n.).

Figures

FIGURES 161–165. Acrotaphus micrus sp. n., ♀ (holotype): 161, habitus; 162, head, dorsal view; 163, face, frontal view; 164, tarsal claw, scale bar =0.2 mm. 165. Distribution of Acrotaphus micrus sp. n. in the Neotropical region.