Chrysotus mccreadiei 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 : 581-582

Chrysotus mccreadiei Runyon & Capellari , sp. nov.

( Figs 3 , 6 )

Description. Male. Body length, 1.5 mm. Wing length, 1.2 mm, width, 0.5 mm. Head. Frons dark brown with violet reflections, ventral half covered with dense silver pollen; antenna yellow; face yellow, about 1 ommatidium wide near middle; proboscis yellow with yellow setae; palpus ( Fig. 3 ) large, yellow, oblong, rather uniformly covered with about 15 black setae, broadest before middle with apex narrowed, slightly thickened, black (ratio tibia I:palpus, 24:24) (MSSC). Thorax. Mesonotum and scutellum brown to green with metallic violet reflections; mesopleuron brown with silver-blue pruinosity. Wing. Halter yellow, calypter yellow. Legs. I: 18, 20, 12, 5, 4, 3, 2. II: 25, 26, 14, 6, 4, 3, 2. III: 28, 28, 8, 7, 4, 3, 2. Legs yellow except coxa II brown; apical tarsomeres only very slightly darkened. Setae on coxae I yellow, those on coxae II and III yellow-brown. Hypopygium ( Fig. 6 ): genital capsule brown; epandrial lobe with 2–3 setae. Surstylus with apical spine and small seta posteriad. Apex of phallus with ventral projection. Cercus yellow, short, with some brown hairs. Female. Body length, 1.6 mm. Wing length, 1.4 mm, width, 0.5 mm. Similar to male, except without MSSC and as noted. Head. Proboscis brownish, larger and more sclerotized than in male. Palpus short, oblong, about as long as clypeus, dark brown with silver pollinosity and brown setae that appear yellow in certain lights, longest setae along apical margin. Antennal postpedicel brown. Legs. I: 22, 20, 10, 5, 4, 2, 2. II: 28, 28, 16, 7, 4, 3, 2. III: 30, 32, 8, 8, 4, 3, 2.

Etymology. This species is named for Dr. John McCreadie (University of South Alabama) who provided specimens of this new species and of two other species described in this paper.

Material examined. HOLOTYPE ♂, “ALABAMA: Baldwin Co. | Little Briar Crk | 30°84 N, 87°94 W | 5 Sept. 2000 | J.W. McCreadie”, “HOLOTYPE | ♂ Chrysotus | mccreadiei | Runyon & Capellari 2018 [red label]” (USNM, type number USNMENT01447153). Paratypes: Alabama: Baldwin Co., Raft, Raft River, 30°77 N, 87°95 W, 24 August 2000, J.W. McCreadie (2 ♂, 2 ♀, MTEC, MZSP).

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

Figures

FIGURE 6. Hypopygium of Chrysotus mccreadiei sp. nov. Abbreviations: ce, cercus; el, epandrial lobe; ph, phallus; su, surstylus.Scale bar = 0.1 mm.

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.