Adelius canadensis Shimbori & Bortoni & Shaw & Souza-Gessner & Cerântola & Penteado-Dias 2019

Adelius canadensis Shimbori & Shaw

(Figs 22–27)

urn:lsid:zoobank.org:act: C9135475-B054-45B6-8B7A-DA5028099E95

Type material. Holotype, ♀ (UKHI): “ CANADA: AB, Cypress Hills Prov. Park, 4km S Elkwater, 22.VI–19.VIII.1988, 1,400m, S&J Peck, Fir-pine-aspen for.” Paratype, ♀ (UKHI): same data as holotype.

Description of holotype, ♀. Body length: 1.9 mm; fore wing length: 1.6 mM.

Color. Dark brown. Pronotum and propleuron yellowish brown. Mesopleuron orangish brown. Legs yellow, darkening toward apex, all tarsi brown. Palpi pale brown. Antenna dark brown with first three segments pale brown. Wings with two faint bands

Head. Length of head in dorsal view 0.6× width. Temples rounded behind eyes, maximum width of head at eye level equal to width at temples level. Antenna slightly longer than body, all flagellomeres longer than wide and without ventral expansion; scape 2.0× longer than wide. Eye height 3.5× longer than malar space. Face very weakly granulate-rugulose above, vertex rugose-striate at posterior half and near stemmaticum, frons smooth, temples and part of gena granulate-rugulose. Frons weakly excavated.

Mesosoma. Mesoscutum punctate anteriorly, posteriorly alutaceus and partly glabrous with few scattered setae. Scutellum smooth and mostly glabrous, with few setae near margins. Scutellar sulcus deeply and entirely crenulate with 11 divisions. Mesoscutellar trough rugose. Metanotum costate. Propodeum mostly polished with irregular surface; with prominent transverse carina separating dorsal and posterior aspects; dorsal aspect with two pairs of longitudinal carinae; posterior aspect with strong v-shaped median carina; dorsal aspect distinctly longer than posterior. Notauli absent. Pronotum mostly smooth and polished, with deep and crenulate ventral groove. Mesopleuron smooth and devoid of setae; sternaulus sinuate, long and crenulate. Metapleuron costate, rugose posteriorly.

Wings. Fore wing vein r absent, 2RS and 3RS apart, both veins merging into stigma, vein R1 0.18× stigma length; stigma 2.4× longer than high.

Legs. Hind tibial spurs 0.2× the hind tibia length. All legs smooth. Mid coxa with wide transverse sulcus dorsally. Hind tibia weakly enlarged apically, narrower than hind femur, 5× longer than its maximum width.

Metasoma. All terga smooth. Mid-longitudinal furrow at base of T1 shallow and not distinctly delimited.

Male. Unknown

Variation. Paratype virtually identical to holotype, differing in the number of divisions of the scutellar sulcus: 16 vs 11 in the holotype.

Diagnosis. Fore wing vein r absent, veins 2RS and 3RSa directly merging into stigma; body mostly dark colored and wings distinctly banded; scutellum mostly smooth and glabrous; propodeum rugose at dorsal aspect, with complete transverse carina and two pairs of longitudinal carinae. This new species most resembles A. nigripectus in having a smooth and mostly glabrous scutellum and a scutellar sulcus entirely and finely crenulate. The two species are readily distinguished by the darker color of A. canadensis sp. n., which is mostly dark brown, as compared with the mainly yellow body of A. nigripectus. The temples are rounded and expanded behind eyes in A. canadensis but directly narrowing behind eyes in A. nigripectus. Additionally, the flagellomeres of A. canadensis are narrower and not as distinctly expanded ventrally as the flagellomeres of A. nigripectus.

Biology. Unknown.

Distribution: Alberta, Canada.

Etymology. The new species is named after the country of Canada where the holotype was collected.