Adelius gauldi Shimbori & Shaw, 2019

Shimbori, Eduardo M., Bortoni, Marco A., Shaw, Scott R., Souza-Gessner, Carolina Da S., Cerântola, Paula De C. M. & Penteado-Dias, Angélica M., 2019, Revision of the New World genera Adelius Haliday and Paradelius de Saeger (Hymenoptera: Braconidae: Cheloninae: Adeliini), Zootaxa 4571 (2), pp. 151-200 : 176-177

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Adelius gauldi Shimbori & Shaw

sp. n.

Adelius gauldi Shimbori & Shaw sp. n.

( Figs 65–70 View FIGURES 65–70 )

Type material. Holotype ♀ (UWIM).: Top label: “Costa Rica: Guanacaste / Santa Rosa Natl. Park / 300m. ex Malaise / Site #: / Dates: 4–24.V.1986 / I.D. Gauld & D. Janzen ”; bottom label: “[SE] Bosque San Emilio / 50 yr old deciduous forest / [C] more or less fully / shaded as possible”. Paratypes 9♀. COSTA RICA : 2 ♀, same as holotype, [H] open regenerating woodland <10 years old; 7♀, same as holotype, ex. light trap, 6.VII.1997, L.J. van der Ent col. ( UWIM) .

Description of holotype, ♀. Body length: 1.5 mm; fore wing length: 1.2 mm.

Color. Mostly yellow. Stemmaticum dark brown; scape, pedicel and flagellomeres 1–2 or 1–3 light yellow, remaining flagellum brown; mandibles light yellow with brown teeth; maxillary and labial palpi whitish yellow. Metanotum brown; propodeum lighter than most of mesosoma. Fore and mid legs light yellow with base of tibia, spurs and tarsomeres 1–4 white, tarsomeres 5 brown; hind legs with coxa, trochanter and trochantellus light yellow, femur and tibia mostly pale brown, basitarsus and tarsomeres 5 brown, base of hind tibia and tarsomeres 2–4 white. Metasoma with T1+2 white except anterior part brown, remainder terga brown. Wings hyaline with two fuscous bands, veins and stigma brown. Ovipositor sheaths brown.

Head. Length of head in dorsal view 0.6× width. Antennae slightly longer than body; scape 2.5× longer than wide; subapical flagellomeres expanded apical-ventrally. Eye height 3.1× longer than malar space. Sculpturing mostly shining coarsely punctate, face and frons weakly rugose near antennal sockets, gena smooth and polished. Malar suture present.

Mesosoma. Mesoscutum and scutellum shining punctate, densely setose, remaining mesosoma smooth and polished. Notauli absent. Pronotum smooth, with rugose groove. Sternaulus distinct and weakly crenulate. Scutellar sulcus with 8 divisions. Metanotum mostly smooth, only weakly costate. Propodeum smooth and polished, with prominent transverse carina, anterior aspect with two pair of lateral carinae; posterior aspect with distinct areola, the lateral carina of areola very close but not touching the transverse carina.

Wings. Fore wing vein r 0.14× stigma height, vein R1 0.18× stigma length.

Legs. Hind tibial spurs 0.23× hind tibia length. All legs smooth. Mid coxa with distinct transverse sulcus dorsally. Hind tibia enlarged apically, about as wide as hind femur, 4.3× longer than maximum width.

Metasoma. All terga smooth except, T1+2 mostly weakly sclerotized; basal area of petiole gradually curved into dorsal terga.

Variation. Body length 1.2–1.5 mm. Metanotum slightly to strongly costate; areola on posterior part of propodeum with lateral carina touching or not the transverse carina; the fuscous bands on fore wing varying from light to dark and slightly variable in width; the first 2–4 flagellomeres varying from whitish yellow to light yellow, and the metanotum color varying from sometimes lighter to sometimes darker than the mesoscutum; pterostigma varying from dark brown to pale brown.

Male. Unknown.

Diagnosis. Adelius gauldi sp. n. is most similar to A. sancticaroli sp. n., differing from it mostly by color patterns and sculpturing. The head is entirely yellow in A. gauldi , as compared with the brown head of A. sancticaroli . The mesosoma is yellow with the metanotum frequently brown in A. gauldi , as compared with mesosoma brown in A. sancticaroli . Most of the hind legs and all of the tarsomeres 5 are brown, and the remaining legs whitish yellow in A. gauldi , while in A. sancticaroli the legs are brown except the fore, middle, and hind coxae, hind tibial spurs and hind tarsomeres 2–5, which are light yellow, and the apex of the fore tarsus, apex of hind femur, and hind tibia dorsally, which are dark brown. The head is mostly smooth, including the face, in A. gauldi , as compared to it being mostly coriaceous with the face partially striate in A. sancticaroli . The sternaulus is well defined ventrally and mostly smooth in A. gauldi , but crenulate in A. sancticaroli . The metapleuron is smooth and polished in A. gauldi , but striate in A. sancticaroli . The propodeum is mostly smooth and polished (except for carinae) in A. gauldi , while it is weakly to strongly rugose in A. sancticaroli . Adelius gauldi is also similar to A. adeleae . A comparison between these two species is made in the diagnosis for the latter species.

Distribution. This species is known from type-locality in Guanacaste Province, Costa Rica.

Etymology. This species is named in memory of the distinguished hymenopterist Ian D. Gauld.