Chrysotus mystax Runyon & Capellari, 2018

Runyon, Justin B. & Capellari, Renato S., 2018, Palpi aplenty: new species in the Chrysotus longipalpus species group (Diptera: Dolichopodidae), Zootaxa 4399 (4), pp. 579-585 : 582-583

Chrysotus mystax Runyon & Capellari , sp. nov.

( Fig. 2 )

Description. Male. Body length, 1.3 mm. Wing length, 1.0 mm, width, 0.4 mm. Head: Frons dark brown to black, with brown pollinosity and little violet reflections; antenna yellow except dorsal edge of pedicel and first flagellomere dark brown; face yellow; proboscis yellow with yellow setae; palpus ( Fig. 2 ) white, shiny, subquadrate, somewhat pointed apicolaterally, with a few short white setae along minutely fringed apical margin (ratio tibia I: palpus, 18:6) (MSSC). Thorax: Mesonotum and scutellum brown with violet reflections and some silver pollinosity; mesopleuron yellow and brown with some violet reflections and little pruinosity. Wing: Halter yellow, calypter very slightly brown at apex. Legs. I: 20, 18, 8, 4, 3, 2, 2. II: 22, 24, 12, 5, 4, 2, 2. III: 24, 24, 6, 6, 4, 2, 2. Legs yellow except coxa II brown. Setae on coxae brown. Abdominal tergites 2–4 yellow laterally. Hypopygium brown, not dissected; cercus yellow, short, with some light brown hairs. Female. Unknown.

Etymology. The species epithet is from the Greek mystax (mustache), in reference to the shape of the male palpi, which resembles facial hair on the upper lip of some male Homo sapiens L. ( Fig. 2 ).

Material examined. HOLOTYPE ♂, “ ALABAMA: Baldwin Co. | Byrnes (Byrnes Lake) | 30°79’N 87°91’W | 21-IX-2000 | J.W. McCreadie”, “ HOLOTYPE | Ƌ Chrysotus | mystax | Runyon & Capellari 2018 [red label]” ( USNM, type number USNMENT01447154).

Distribution. USA: Alabama, Mobile-Tensaw River Delta.

Figures

FIGURES 1–4. Heads of males of new species in the Chrysotus longipalpus species group. 1. Chrysotus plumarista sp. nov., dorsolateral view; inset shows male arista. 2. Chrysotus mystax sp. nov., anterior view. 3. Chrysotus mccreadiei sp. nov., anterior view.4. Chrysotus keyensis sp.nov.; a. anterodorsal view; b. lateral view. Scale bar = 0.5 mm.