Chalcis quechua Saguiah & Tavares,

Saguiah, Pâmella Machado, Molin, Ana Dal & Tavares, Marcelo Teixeira, 2020, The South American species of Chalcis Fabricius (Hymenoptera: Chalcididae), Zootaxa 4885 (3), pp. 353-383: 375-377

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Chalcis quechua Saguiah & Tavares

sp. nov.

Chalcis quechua Saguiah & Tavares  , sp. nov.

Figs 17View FIGURE 17 a–f, 18a, b

Diagnosis. This species can be recognized by the following combination of characters: Female. Antennal anellus longer than wide ( Fig. 17dView FIGURE 17); mesepisternum mostly smooth and shiny at upper quarter; protarsal claws falcate; protarsomeres 4 and 5 each with a pair of peg-like spines ventrally ( Fig. 17eView FIGURE 17); parascrobal area almost entirely smooth and shiny ( Fig. 17cView FIGURE 17); metafemur ventrally with sharp inner basal tooth ( Fig. 18aView FIGURE 18); propodeum with a well-defined diamond-shaped areola medial to adpetiolar area ( Fig. 18bView FIGURE 18); petiole 5.2× as long as wide.

Description. FEMALE. Length 5.5 mm. Color: Predominantly black but the following parts yellow ( Figs 17View FIGURE 17 a–c, f): parascrobal area through lower face ( Fig. 17cView FIGURE 17), pronotal collar ( Fig. 17bView FIGURE 17), tegula, mesoscutellum laterally, profemur apically, anterior face of protibia, mesofemur basally and apically, mesotibia apically, metafemur internally and externally with C-shaped spot next to apex ( Fig. 17fView FIGURE 17), metatibia basally, tarsi, and petiole. Wings slightly infuscate ( Figs 17a, bView FIGURE 17).

Head. Lower face not bulging above clypeus, with shallow umbilicate fovea, interstices moderately broad and finely coriaceous to smooth, shiny ( Fig. 17cView FIGURE 17); parascrobal area foveolate, interstices broad and mostly smooth and shiny, median intumescence absent ( Fig. 17cView FIGURE 17); malar space 0.4× eye height; malar sulcus conspicuous, sinuous; internal carina fine and inconspicuous, absent near eye; external carina conspicuous, complete; gena smooth to alutaceous, genal carina reaching vertex; mandibular formula 2:3; antennal scrobe from smooth and shiny ventrally to coriaceous dorsally and without transverse carina below median ocellus ( Fig. 17cView FIGURE 17); interantennal projection without median carina dorsally. MOD:POL:APL:OOL = 0.5:0.3:0.11:0.13. Scape 6.1× as long as wide, inner face flattened; anellus longer than wide; Fu1 about 2× as long as wide, and 1.0× as long as Fu2 length ( Fig. 17dView FIGURE 17).

Mesosoma  . Mesoscutum with interstices coriaceous and dull, narrower than diameter of umbilicate foveae; mesoscutellum flat, frenal carina forming two sublateral lobes; mesopleuron with mesepisternum from smooth and shiny to coriaceous at upper quarter and along the outer margin (except for 1 fovea dorsally), rugulose medially and foveate ventrally; propodeum with regular median carina, submedian carina absent, anterior costulae incomplete, posterior costulae irregular, adpetiolar area with well-defined and diamond-shaped areola medially, anterosubmedial area sparsely rugose to coriaceous ( Fig. 18bView FIGURE 18); tarsomeres 4 and 5 of all legs with pubescence similar to basal tarsomeres; protarsomeres 4 and 5 each with a pair of distinct peg-like spines ventrally ( Fig. 17eView FIGURE 17); protarsal claws falcate, ventrally with 4 basal spines followed by 1 acute prominence; mesocoxa slightly pubescent posteriorly; mesotibial spur 0.9× as long as the width of the mesotibial apex; metacoxa smooth and shiny dorsally, inner face pubescent; metafemur with outer face punctate and interstices smooth and shiny, ventrally with acute inner basal tooth ( Fig. 18aView FIGURE 18) and 12 or 13 teeth along the outer margin, outer basal tooth the largest and close to second tooth, the latter minute, the following teeth increasing in size up to the sixth tooth ( Fig. 17fView FIGURE 17); metatibia with apical spine slender and longer than the apical width of metatibia; metatarsomere 1 slightly longer than any of tarsomeres 2–5. Fore wing SMV:MV:PMV = 1.59:0.82:0.82.

Metasoma. Petiole 5.2× as long as wide, cylindrical, dorsolateral carina very short, ventrally without longitudinal carina; hypopygial median projection apically with distinct set of short and appressed bristles, ventrally with densely distributed bristles (bristles longer than the width of hypopygial projection in lateral view); ovipositor sheath slightly obliquely truncate apically, with some long setae.

MALE. Unknown.

Material examined. Holotype. ♀ ( NHMUK), ‘ Ecuador, Napo, 10 Km SW of Tena, 500 m, 21.VIII.1981 M. Cooper col.’. 

Biology. Unknown.

Distribution. ECUADOR (Napo).

Remarks. The only known female of C. quechua  is most similar to C. danunciae  and C. winstonae  females (see “Putative Relationships” below), but can be distinguished from those by the presence of an inner basal tooth ventrally on the metafemur ( Fig. 18aView FIGURE 18) and a more elongate petiole, 5.2× as long as wide. This female was collected in the Ecuadorian Amazon, resulting in the most remote distribution in comparison to all other species treated here ( Fig. 22View FIGURE 22).

Etymology. The specific epithet is a noun in apposition that refers to the Indigenous peoples present in the type locality.


Natural History Museum, London