Forrestopius petiolatus Palacio

Alvarado, Mabel & Palacio, Edgard, 2021, Forrestopius Gauld & Sithole, 2002 (Hymenoptera: Ichneumonidae: Metopiinae) in South America, Zootaxa 5040 (2), pp. 265-282: 274-276

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Forrestopius petiolatus Palacio

sp. nov.

Forrestopius petiolatus Palacio   sp. nov.

( Figs 6 View FIGURE 6 , 10B View FIGURE 10 )

Holotype. ♀, “ COLOMBIA: Boyacá, Arcabuco, finca El Edén, 5°25’N 73°27’W, 6.v.2001, 2800m, Net trap, T. Angarita” ( MPUJ _ ENT). GoogleMaps  

Diagnosis. This species can be recognized by the following combination of characters: mandible with two teeth, clypeus+face forming a continuous surface, antenna with 22 flagellomeres, wrinkle arising from pronotal pit reaching about two thirds way to anterior margin ( Fig. 6D View FIGURE 6 ), tergite I petiolate, 2.9× as long as posteriorly wide ( Fig. 6B View FIGURE 6 ); tergite II 2.1× as long as posteriorly wide, hind wing with distal abscissae of M, Cu 1, and 1 A indistinguishable. The slender metasoma with tergite I petiolate distinguish this species from all others in the genus.

Description. Female: Body length 6.8 mm. Fore wing length 4.6mm.

Head. Face and clypeus forming a continuous surface 1.0× as long as wide, punctate, centrally rugo-reticulate, with upper quarter transversely striate ( Fig. 6C View FIGURE 6 ); labrum not exposed when mandibles closed; mandibles with two teeth; malar space 0.6× as long as basal mandibular width; lateral ocellus separated from compound eye by about 1.4× maximum ocellar diameter; distance between ocelli 1.6× maximum ocellar diameter; vertex behind ocellar triangle more or less convex, occiput abruptly declivous; gena in lateral view about 1.2× as long as compound eye; antenna with 22 flagellomeres, ratio of length from second to fourth flagellomeres: 1.4:1.2:1.2, subapical flagellomere 1.0x as long as centrally broad.

Mesosoma   . Pronotum with a wrinkle arising frompronotal pit reaching about two thirds way to anterior margin ( Fig. 6D View FIGURE 6 ); metapleuron smooth and polished with sparse setae on apical part, posteroventrally; submetapleural carina smooth, anteriorly expanded into a triangular lobe. Propodeum with lateromedian longitudinal carina strong, slightly closer to each other anteriorly; area basalis+superomedia 3.9× as long as wide; lateral longitudinal carina anteriorly absent; posterior transverse carina complete, enclosing area petiolaris and area coxalis. Fore wing with vein Cu 1 a between Cu 1 b and 2 m-cu 1.2× as long as Cu 1 between Rs & M and 1 m-cu; 2 rs-m 0.8× as long as abscissa of M between 2 rs-m and 2 m-cu. Hind wing with distal abscissae of M, Cu 1 and 1 A indistinguishable. Outer metatibial spur 0.7× as long as inner spur.

Metasoma. Tergite I 2.9× as long as posteriorly wide ( Fig. 6B View FIGURE 6 ), lateromedian carina absent, smooth with isolated punctures laterally on the apical half; tergite II 2.1× as long as posteriorly wide; laterotergite II about 0.1× as wide as long; laterotergite III about 0.3× as wide as long, wedge-shaped, mesal edge straight.

Colour. Body extensively black except palpi, apex of mandibles, inner surface of prothoracic and mesothoracic tibiae, tarsi, ovipositor, and valvae brownish yellow to brown.

Male. Unknown

Remarks. This species occurs in Cloud forest of Colombia at 2800m ( Fig. 10C View FIGURE 10 ).

Etymology. The specific epithet petiolatus   refers to the elongate first metasomal segment that distinguishes this species from all other in the genus.


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