Udamopyga squamata Santos & Mello-Patiu, 2018

Santos, Josenilson Rodrigues Dos & Mello-Patiu, Cátia Antunes De, 2018, Review of the Brazilian species of Udamopyga Hall, 1938 (Diptera: Sarcophagidae), with the description of a new species and a key to males and females, Zootaxa 4508 (1), pp. 1-27 : 5-9

Udamopyga squamata Santos & Mello-Patiu sp. nov.

( Figs 7–17 )

Type-material. HOLOTYPE ♂: “ Brasil, RJ [Rio de Janeiro], São Francisco do Itabapoana / E. E. E. [ Estação Ecológica Estadual ] Guaxindiba / Trilha Renata / Bruno / (atrás charco) - Malaise / junho–julho.2013 Eq.[Equipe] Col.[de Coleta] [printed on white paper] / Biota Diptera Fluminense [vertical]” // “ Holotype [printed on red paper, black frame]” // “ Udamopyga squamata / Santos & Mello-Patiu 2017 / HOLOTYPE / Det. J.R.Santos & C.A.Mello-Patiu [handwritten on white paper]” ( MNRJ) [holotype in good condition, with right fore and left hind legs missing; terminalia dissected].

PARATYPES. 1 ♂, 2 ♀♀: BRAZIL, Santa Catarina, Nova Teutônia [Seara], 27°11’S 52°23’W, vi.1950, 300– 500 m, Fritz Plaumann leg. ( MNRJ) [♀♀ in good condition, one with abdomen dissected; ♂ with abdomen dissected, vesica with right inner ventral margin broken, right wing and legs glued on card] .

Diagnosis. Male: cercal base with long and similar-sized setae ( Figs 8–9 ); vesica with two distal rounded lobes, each with inner ventral margin as a ladle-shaped projection ( Figs 10–11 ); juxta formed of two, welldemarcated rounded lobes with squamous ornamentation ( Figs 10–11 ). Female: T6 undivided, with a longitudinal crease along midline giving it roof-like appearance ( Figs 12–13 , 15 ); T8 divided into two narrow halves ( Fig. 13 ); epiproct absent ( Figs 12–13 ); ST5 as long as wide ( Fig. 12 ); ST6–8 fused, ST7 3x as long as ST6, with a concave area in posterior half; ST8 rounded and shorter than ST6 and ST7 ( Figs 12–13 ).

Description. Male (n = 2). Length: 7–10 mm.

Head. Parafacial, fronto-orbital plate and postocular orbits dark brown with slightly yellowish-silver pruinosity ( Figs 14, 16–17 ); facial ridge with setae on lower half; parafacial with row of setulae close to eye, the lowermost 1– 2 similar in size to subvibrissal setae; frons about 0.25x head width at level of ocellar triangle; frontal vitta entirely blackish; 9–10 well-developed frontal setae reaching level of apex of pedicel; rows of frontal setae parallel except anteriormost 2 divergent; reclinate orbital seta present, proclinate orbital setae absent; ocellar setae as developed as upper frontals; outer vertical seta undifferentiated from postocular setae; gena and genal groove with yellowishsilver pruinosity ( Figs 14, 16 ); gena with black setae; postgena silvery-gray pruinose with black setae anteriorly and whitish setae close to occiput ( Figs 14, 16 ); antenna black ( Figs 14, 16 ); first flagellomere approximately 3x longer than pedicel; arista long plumose on basal 3/4, with upper rays in a double row; palpus blackish ( Figs 14, 16 ).

Thorax. Dark brown with silvery-gray pruinosity, slightly golden on postpronotum ( Figs 14, 16–17 ); chaetotaxy: acrostichals 2–3 (well developed) + 1, dorsocentrals 3 (the anteriormost shorter) + 4 (well developed), intra-alars 1+2, supra-alars 2+3, postpronotals 3, notopleurals 4; postalar wall setulose; postalar callus with 2 setae; scutellum with a pair of basal, lateral and subapical setae (the lateral one shorter), a pair of apical setae, and a pair of preapical discal setae; katepisternum with 3 setae almost in a straight line; meral setae 9–10; proepisternum bare; prosternum setulose. Wing. Hyaline, with dark brown veins; tegula dark brown; basicosta yellowish ( Fig. 14 ); vein R 4+5 with setulae dorsally on 2/3 of distance to crossvein r-m; vein R 1 bare; cell r 4+5 open at wing margin; costal spine not differentiated; third costal sector setulose ventrally. Legs. Blackish-brown, pulvilli yellowish-brown; mid femur with 3 median anterior setae, a row of anteroventral setae, 2 preapical posterior setae, a row of posteroventral setae, and without a ctenidium; mid tibia with 1 median anterior seta, 1 basal posterior seta and 2 posterior setae in apical third; hind trochanter with a ventromedian pad of short, spiniform setae.

Abdomen. Dark brown with silvery-gray pruinosity ( Figs 14, 16–17 ); T4 with 1 pair of longer median marginal setae and 1 pair of lateral marginal setae; T5 with a row of 14 marginal setae; ST2–4 with marginal setae more developed than discal setae; ST3–4 with one pair of longer posterior marginal setae; ST5 deeply cleft up to midlength, base with a long median window, arm with a pad-shaped protrusion along inner margin and with long setae at apex ( Fig. 7 ). Terminalia. Syntergosternite 7+8 and epandrium yellowish-brown; phallus, gonites and cercal apex dark brown; cercus with numerous long setae on base and short and sparse setae in apical half; cercal prongs parallel and very close together, separated only in apical third in posterior view, and with apex enlarged and truncated in lateral view ( Figs 8–9 ); surstylus axe-like, with long apical setae ( Fig. 8 ); pregonite longer than postgonite, with broad base and slightly curved apex ( Fig. 10 ); postgonite with sub-triangular base, pointed and curved apex, and with a long seta inserted near anterobasal corner ( Fig. 10 ); hypandrium smaller than phallapodeme ( Fig. 10 ); postgonal apodeme short and rectangular ( Fig. 10 ); phallus with basiphallus distinct from distiphallus, both of similar length ( Fig. 10 ); vesica with rounded lobes and inner ventral margin with a ladleshaped projection at apex ( Figs 10–11 ; paratype with right inner ventral margin of vesica broken); juxta well demarcated, with two rounded lobes with squamous ornamentation ( Figs 10–11 ); median stylus with enlarged and sub-quadrangular base and apex narrow, straight and spinose ( Fig. 11 ); lateral stylus tube-like, short and robust, with apical spines ( Fig. 11 ).

Female (n = 2). Length: 8–12 mm. Differs from male as follows: frons about 0.28x head width at level of ocellar triangle, with 7–8 well-developed frontal setae; 2 proclinate orbital setae similar to or slightly longer than reclinate orbital setae; outer vertical seta about 2/3 to 1/2 length of inner vertical seta; scutellum without apical setae; hind trochanter without modified ventromedian setae; ST2–3 with 2 pairs and ST4 with 1 pair of long marginal setae, respectively ( Fig. 12 ); ST5 almost as long as wide, with 4 setae along posterior margin ( Fig. 12 ); terminalia reddish-brown; T6 undivided and broad posteriorly, with a longitudinal crease along midline, giving it roof-like appearance; posterior margin with a row of longer marginal setae ( Figs 12–13 , 15 ); spiracles 6 in intersegmental membrane and spiracles 7 in tergal plate ( Figs 12–13 ); T8 divided into two narrow and bare halves ( Fig. 13 ); ST6–8 fused; ST6+ST7 almost rounded ( Figs 12–13 ); ST6 short with numerous marginal setae (a median pair longer and stronger) ( Figs 12–13 ); ST7 about 3x as long as ST6, with numerous setae along posterior margin and a characteristic discal concavity in posterior half ( Figs 12–13 ); ST8 short, with basal section membranous and apex rounded, setose and sclerotized ( Figs 12–13 ); epiproct absent; hypoproct broad, with setae longer and more numerous on sides ( Figs 12–13 ); cercus broad and rounded ( Figs 12–13 ); vaginal plate membranous; spermathecae oval and striated ( Fig. 13 ).

Distribution. Brazil (Rio de Janeiro, Santa Catarina).

Etymology. The species epithet is derived from the Latin squamata (adjective, feminine), meaning scaly, in allusion to the squamous ornamentation of the juxta.

Remarks. Udamopyga squamata sp. nov. is morphologically similar to Udamopyga diversa . Males of both species have ST5 arm with a pad-shaped protrusion along the inner margin ( Figs 7 , 18 ), cerci not fused at apex ( Figs 9 , 20 ), surstylus axe-like ( Figs 8 , 19 ), and postgonite curved, with sharp-pointed apex ( Figs 10 , 21 ). These two species can be differentiated by the following features: 3+4 dorsocentral setae, vesica with inner ventral margin as a ladle-like projection without ornamentation ( Figs 10–11 ), juxta with squamous ornamentation ( Figs 10–11 ), and T6 of female with a longitudinal crease along midline ( Fig. 15 ) in U. squamata sp. nov., versus 3+3 dorsocentral setae, vesica with ventral spines and inner ventral margin as a spinose projection ( Fig. 21–22 ), juxta without ornamentation ( Figs 21–22 ), and T6 of female slightly curved along midline in U. diversa ( Fig. 52 ).

Figures

FIGURES 7–11. Udamopyga squamata sp. nov., male paratype (MNRJ). 7. Sternite 5, ventral view. 8. Syntergosternite 7+8, epandrium, cercus and surstylus, lateral view. 9. Cerci, posterior view. 10. Phallus and associated structures, lateral view. 11. Distiphallus, ventral view. Abbreviations: ce, cercus; im, inner ventral margin of vesica; ju, juxta; ls, lateral stylus; ms, median stylus; po, postgonite; pp, paraphallus; pr, pregonite; su, surstylus; ve, vesica; wd, window. Scale bars = 0.2 mm.

FIGURES 12–13. Udamopyga squamata sp. nov., female paratype (MNRJ). 12. Terminalia and abdominal sternites, ventral view. 13. Terminalia and one spermatheca, ventral view (arrow points to discal concavity). Abbreviations: ce, cercus; hy, hypoproct; sp, spiracle; ST, sternite; T, tergite. Scale bars = 0.5 mm.

FIGURES 14–17. Udamopyga squamata sp. nov. 14–15. Female paratype (MNRJ). 16–17. Holotype ♂ (MNRJ). 14. Habitus, lateral view. 15. Terminalia, posterior view (arrow points to T6). 16. Habitus, lateral view. 17. Habitus, dorsal view. Scale bars = 1.0 mm.

FIGURES 18–22. Udamopyga diversa Lopes, male from Linhares (MNRJ). 18. Sternite 5, ventral view. 19. Syntergosternite 7+8, epandrium, cercus and surstylus, lateral view. 20. Cerci, posterior view. 21. Phallus and associated structures, lateral view. 22. Distiphallus, ventral view. Abbreviations: ce, cercus; im, inner ventral margin of vesica; ju, juxta; ls, lateral stylus; ms, median stylus; po, postgonite; pp, paraphallus; pr, pregonite; su, surstylus; ve, vesica. Scale bars = 0.2 mm.

FIGURES 52–57. Female terminalia of Udamopyga Hall spp., posterior view. 52. Udamopyga diversa Lopes (allotype, MNRJ). 53. Udamopyga malacophila Lopes (specimen from Linhares, MNRJ). 54. Udamopyga neivai Lopes (paratype, MNRJ). 55. Udamopyga percita (Lopes) (specimen from Guarapari, MNRJ). 56. Udamopyga provecta (Lopes) (paratype, MNRJ). 57. Udamopyga setigena (Enderlein) (paratype, MNRJ). White arrows point to T6, green arrows point to discal concavity on ST7. Scale bars = 0.5 mm.