Oromasiphya urbanae Guimarães, 1966

Toma, Ronaldo & Pinheiro, Rodrigo A., 2025, New species of Oromasiphya Townsend (Diptera: Tachinidae) with a key to the species, Zootaxa 5729 (1), pp. 163-174 : 172-173

Oromasiphya urbanae Guimarães, 1966

( Figs. 9–11, 13,14 , 29–31 )

Diagnosis. Oromasiphya urbanae differs from the other members of the genus by the head and thorax dorsum overall pruinosity yellow or grayish yellow; occiput with yellow hairs; the lowest postocular setula at level of lower fourth of eye; katepimeron haired; abdomen, in male, in ventral view, with yellow patch of micro-hairs on tergites 4 and 5, and abdominal hairs concentrated closer to the yellow patch of micro-hairs.

Description. Male. Body length: 8.84–10.21 mm, wing length: 7.97–8.12 mm.

Coloration. Head yellow pruinose, upper portion of occiput varying from slightly yellowish to slightly yellowish gray pruinosity; occiput with yellowish hairs; frontal vitta dark brown; ocellar triangle with yellow pruinosity; apical two-thirds of postpedicel brown; scape, pedicel, and basal one-third of postpedicel orange; palpus yellow; proboscis brown; thorax dorsum dark brown with yellow or slightly yellowish-gray pruinosity; scutum with four black longitudinal stripes, with the same pattern of O. diamantina sp. nov., but with wider stripes and the two stripes outside of the acrostichal rows interrupted near level of second acrostichal postsutural setae; lateral of thorax orange-brown; posterior portion of anepisternum, upper portion of katepisternum, and anterior portion of anepimeron yellow pruinose; proepisternum and proepimeron yellowish gray pruinose; legs brown with gray pruinosity; wing subhyaline; tegula dark brown and basicosta brown; upper and lower calypters light yellow; abdomen, in dorsal view, dark brown with basal two-thirds of tergites 3 and 4 irregular gray pruinose; apical portion of tergite 3 and 4 faint brass pruinoisity viewed from certain angles; abdomen in ventral view with tergite 3 and 4 with gray pruinosity viewed from certain angles.

Head. Vertex about 0.25x head width in dorsal view; outer vertical setae about 0,37x length of inner vertical setae; fronto-orbital plate with hairs descending near level of base of pedicel; the lowest postocular setula at level of lower fourth of eye; pedicel about 0.45x length of postpedicel; scape about 0.45x length of pedicel; genal and subvibrissal setae about 0.5x vibrissa length, roughly in a continuous line.

Legs. Mid tibia with four anterodorsal setae, the second proximal one longer and stronger; a row of posterior setae, with two longer setae; and one or two ventral setae, the distal one stronger.

Abdomen. Tergite 3 without a pair of lateral discal setae; yellow patch of micro-hairs on ventral side of the abdominal tergites 4 and 5; abdominal hairs on ventral side concentrated closer to the yellow patch of micro-hairs than in other species.

Terminalia. The terminalia ( Figs. 29–31 ) of this species are the most different from the other species described above, mainly in the shape of the cercus, surstylus, and distiphallus. Cercus, in lateral view, with its anterior surface edentate and, in posterior view, rather tapered in the apical half; surstylus, in lateral view, with the posterior surface convex, bearing long hairs, and the anterior surface more straight; distiphallus elongated, more elongated than those of the other species, bearing micro-hairs along almost the entire ventral surface; apical structure of the distiphallus formed by a pair of conical tubes, each tube bearing a small stem with a micro-spine apically and a semi-enveloped membrane covered with micro-spines ventrally.

Female. Although Guimarães (1966a) initially misdescribed the female head pruinosity color in the holotype, he later corrected it in the comparative diagnosis, describing it as “golden yellow”. The female description given by Guimarães is good, and there is no need to redescribe it. It is worth mentioning two diagnostic characteristics, previously not described by Guimarães, present in both male and female of this species and absent in the other species of the genus: the lowest postocular setula at level of lower fourth of eye and katepimeron haired.

Comments. The description of the male above was based on three specimens showing a strong resemblance to the female holotype in overall color pattern and chaetotaxy, and they are provisionally assigned to this species.

Geographic distribution. Brazil ( São Paulo: Santo Amaro: Cocaia [previous distribution]; Rio de Janeiro: Itatiaia; Santa Catarina: Nova Teutônia [new distributions]) .

Type material examined. Holotype female ( MZUSP), labeled: “S.P.—Santo Amaro/ Cocaia— H. Urban col.”; “1938”; “35”; “28.739”; “ Oromasiphyia urbani [ sic —handwritten]/ J. H. Guimarães det.”; “ Holótipo [pink label]”; “MZOO1557”. [ The puparium is pinned together with the adult. Dissection to remove the terminalia was done starting at tergite 5. The terminalia is mounted on a slide].

Material examined. One male ( MZUSP), labeled: “Brazilien/ Nova Teutonia/ 27º 11’ B: 52° 23’ L/ Fritz Plaumann/ xi.19670 [70—handwritten] [on the label’s left side]/ 300-500 m [on the label’s right side]”; “3552” . One male ( MZUSP): “Brazilien/ Nova Teutonia/ 27º 11’ B: 52° 23’ L/ Fritz Plaumann/ xii.1960 [0—handwritten] [on the label’s left side]/ 300-500 m [on the label’s right side]”; “3311” . One male ( MZUSP): “Itatiaia 800 mt/ 12– [1]933 S. Lopes / ET R. Cunha ”; “4412”. The material (3352) was found dissected, and the structures of the terminalia are strongly diaphanized and softened .

Figures

FIGURES 9–16. Oromasiphya spp. 9 and 10, Oromasiphya urbanae Guimarães, male habitus, lateral and dorsal views (scale bar 1mm); 11 and 12, Oromasiphya urbanae and Oromasiphya mineira sp. nov., respectively: abdomen ventral view (scale bar 1 mm); 13 and14, Oromasiphya urbanae, female habitus, lateral and ventral views (scale bar 1 mm); 15 and 16, Oromasiphya diamantina sp. nov., female terminalia, lateral and ventral views (scale bar 0,25 mm). Abbreviations: cerc—cercus; hyprct— hypoproct; ps—piercing structure; st6—sternite 6; st7—sternite 7; tg6—tergite 6; tg7 tergite 7.

FIGURES 17–31. Oromasiphya spp., male terminalia, lateral, posterior, and ventro-lateral views (scale bar 0,25 mm): 17– 19, Oromasiphya diamantina sp. nov.; 20–22, Oromasiphya guimai sp. nov.; 23–25, Oromasiphya mineira sp. nov.; 26–28, Oromasiphya ornata Townsend; 29–31, Oromasiphya urbanae Guimarães. Abbreviations: cerc—cercus; distph—distiphallus; dlfp—flap-like structure at the dorsal base of the dorsal tube; dlt—dorsal tube; epand—epandrium; hypd—hypandrium; pret+pgt—fused pre- and postgonites; segm7+8—segment 7+8; st5—sternite 5; st6—sternite 6; sur—surstylus; vlfp—flap-like structure at the ventral base of the ventral tube; vlt—ventral tube.