Chalcis winstonae 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: 378-380

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Chalcis winstonae Saguiah & Tavares

sp. nov.

Chalcis winstonae Saguiah & Tavares  , sp. nov.

Figs 19View FIGURE 19 a–f, 20a

Diagnosis. Female. Antennal anellus longer than wide ( Fig. 19dView FIGURE 19); protarsal claws falcate; protarsomeres 4 and 5 each with a pair of peg-like spines ventrally; clypeus and scrobe smooth and shiny ( Fig. 19cView FIGURE 19); Fu1 2.2× as long as wide ( Fig. 19dView FIGURE 19); metafemur ventrally with 11 teeth along outer margin ( Fig. 19eView FIGURE 19); propodeum with adpetiolar area with narrow areola medially ( Fig. 19fView FIGURE 19); petiole 4.2× as long as wide.

Description. FEMALE. Length 4.6 mm. Color: Predominantly dark brown to black, the following parts yellow ( Figs 19View FIGURE 19 a–c, e, 20a): parascrobal area through lower face ( Fig. 19cView FIGURE 19), pronotal collar, tegula, mesoscutellum laterally ( Fig. 19bView FIGURE 19), protibia anteriorly, mesofemur apically, metatibia basally, outer face of metafemur subapically ( Fig. 19eView FIGURE 19), metatibia basally, tarsi and petiole. Wings slightly infuscate ( Figs 19a, bView FIGURE 19).

Head. Lower face not bulging above clypeus, with shallow umbilicate fovea, interstices moderately broad and finely coriaceous to smooth and shiny ( Fig. 19cView FIGURE 19); parascrobal area foveolate, interstices broad and finely coriaceous to slightly shiny, median intumescence absent; 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. 19cView FIGURE 19); interantennal projection with inconspicuous median carina dorsally, carina extending slightly beyond interantennal projection. MOD:POL:APL: OOL = 0.16:0.31:0.1:0.14. Scape 5.5× as long as wide, inner face flattened; anellus longer than wide ( Fig. 19dView FIGURE 19); Fu1 longer than all other funicular segments with about 2.2× as long as wide and 1.2× as long as Fu2 length ( Fig. 19dView FIGURE 19).

Mesosoma  . Mesoscutum with interstices coriaceous and dull, in some areas broader than 2× diameter of umbilicate foveae; mesoscutellum flat, frenal carina emarginate, blade-like; mesopleuron with mesepisternum mostly smooth and shiny to coriaceous, except for few irregularly foveae medially and ventrally; propodeum with regular median carina, submedian carina absent, anterior costulae incomplete, posterior costulae almost straight, adpetiolar area with narrow areola medially, anterosubmedial area sparsely rugulose to coriaceous ( Fig. 19fView FIGURE 19); 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, 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 without inner basal tooth but with 12 or 13 teeth along outer margin, outer basal tooth the largest and close to second tooth, the latter minute, the following teeth increasing in size up to the ninth tooth ( Fig. 19eView FIGURE 19); metatibial 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 1.85:0.93:0.71.

Metasoma. Petiole 4.2× as long as wide, cylindrical, dorsolateral carina very short, ventrally without longitudinal carina; hypopygial median projection apically with some short and appressed bristles, ventrally with densely distributed bristles (bristles longer than the width of hypopygial projection in lateral view) ( Fig. 20aView FIGURE 20); ovipositor sheath slightly obliquely truncate apically, with some long setae ( Fig. 20aView FIGURE 20).

MALE. Unknown.

Material examined. Holotype. ♀ ( NHMUK), ‘ Bolivia, Yungas , Puente Villa, 1200 m., 20.XII.1955 ’. 

Biology. Unknown.

Distribution. BOLIVIA (Yungas).

Remarks. The only known female of C. winstonae  is most similar to C. danunciae  and C. quechua  females (see “Putative Relationships” below), but can be distinguished from them by the metafemur having 11 ventral teeth along the outer margin ( Fig. 19eView FIGURE 19) and the propodeum with a narrow areola medial to the adpetiolar area ( Fig. 19fView FIGURE 19).

Etymology. This species is named after Dr. Judith Ellen Winston in recognition of her enormous contribution to the practice of taxonomy.


Natural History Museum, London