Chiromyza raccai, Pujol-Luz, 2020

Pujol-Luz, José Roberto, 2020, A new species of the genus Chiromyza Wiedemann (Diptera, Stratiomyidae) from Rio de Janeiro, Brazil, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60, pp. 1-8 : 2-6

Chiromyza raccai , new species

Diagnosis: Body brownish, thorax with four conspicuous dark brown stripes; membrane of wings strongly darkened around longitudinal and transversal veins; legs mostly yellowish-brown, tibiae club-like, with base narrowed and apex enlarged, tibiae patterned in females, with femora with basal ⅔ dark brown and distal ⅓ brownish yellow, tibiae with basal ⅓ brownish yellow and distal ⅔ dark brown; abdomen light brown; hypandrium with posterior margin triangular and apex extending beyond base of gonostylus insertion, phallus tubular with distal extremity rounded with two conspicuous apical setae; female genitalia with genital fork rectangular, fork arms tapering, two lateral membranous oviducts, spermathecae with three long glandular ducts, each one with valve in the distal ⅓, ending in a semi-spherical and strongly sclerotized spermathecal capsule.

Type material: The male Holotype male is housed in the Coleção Entomológica do Departamento de Zoologia da Universidade de Brasília ( DZUB), Brasília-DF, Brazil,and labeled:MiguelPereira-RJ/F.RaccaFºcol./ 30.VII.1998 [white label] ; Holótipo [red label] ; UnB -237877 [white label]. Complementary material: Paratypes (males), labeled: Miguel Pereira-RJ/ F. Racca Fº col./ VI.1996 [white label]; Parátipo [green label] ; 9 [UnB-237844-237852]; Miguel Pereira-RJ/ 30.VII. 1996 ,600m/ F.Racca Fº col.[white label]; Parátipo [green label] ; 5 [UnB -237853-237857]; Miguel Pereira-RJ/ VIII. 1996, 600m/ F. Racca Fº [white label] ; Parátipo [green label] ;1 [UnB-237858]; Miguel Pereira-RJ/ IX. 1996, 600m/ F. Racca Fº [white label] ; Parátipo [green label] ; 1 [UnB-237859]; Miguel Pereira-RJ/ F. Racca Fº col. [white label]/ 30.VII. 1998, 600m /; Parátipo [green label] ; 16 [UnB-237860-237875]; Miguel Pereira-RJ/ F. Racca Fº col. [white label]/ 04.VIII. 1998, 600m /; Parátipo [green label] ; 1 [UnB-237876]. Paratypes (females), labeled: Miguel Pereira-RJ/ F. Racca Fº col./ VI.1996 [white label]; Parátipo [green label] ; 8 [UnB-237878-237885], Miguel Pereira-RJ/ F. Racca Fº col./ VI.1996 [white label]; Parátipo [green label] ; 4 [UnB-237886-237889]; Miguel Pereira-RJ/ F. Racca Fº col./ VII.1996 [white label]; Parátipo [green label] ; 1 [UnB-2378490]; Miguel Pereira-RJ/ F. Racca Fº col./ VIII.1996 [white label]; Parátipo [green label] ; 7 [UnB-237891-237897]; Miguel Pereira-RJ/ F. Racca Fº col./ 09. VI.1998 [white label]; Parátipo [green label] ; 3 [UnB-237898-237900; 237908]; Miguel Pereira-RJ/ F. Racca Fº col./ 30.VII.1998 [white label]; Parátipo [green label] ; 7 [UnB-237901-237907]. Paratypes dissected (males), Miguel Pereira-RJ/ F.Racca Fº col./ VI.1996 [white label]; Parátipo [green label] ; 3 [UnB-237909-237911]; Miguel Pereira-RJ/ VIII. 1996, 600m/ F. Racca Fº [white label] ; Parátipo [green label] ; 1 [UnB-237912]; Miguel Pereira-RJ/ F.Racca Fº col.[white label]/ 30.VII. 1998 ,600m /; Parátipo [green label] ; [UnB -237913-237914]; Valença-RJ/ Pujol-Luz col./ 13.VIII.1997 [white label], Parátipo [green label] ; 1 [UnB-237981]. Paratypes dissected (females), Miguel Pereira-RJ/ F. Racca Fº col./ 30.VII.1998 [white label]; Parátipo [green label] ; 9 [UnB-237915-237923]; Miguel Pereira-RJ/ F. Racca Fº col./ VI.1996 [white label]; Parátipo [green label] ; 2 [UnB-237924-237925]; Miguel Pereira-RJ/ F. Racca Fº col./ VIII.1996 [white label]; Parátipo [green label] ; 1 [UnB-237926]; Miguel Pereira-RJ/ IX. 1996, 600m/ F. Racca Fº [white label] ; Parátipo [green label] ; 1 [UnB-237927]; Miguel Pereira-RJ/ F. Racca Fº col. [white label]/ 04.VIII. 1998, 600m /; Parátipo [green label] ; 1 [UnB-237928]; Miguel Pereira-RJ/ F. Racca Fº col./ 1996, 600m [white label] ; Parátipo [green label] ; 1 [UnB-237929]; Valença-RJ/ Pujol-Luz col./ 13.VIII.1997 [white label], Parátipo [green label] ; 1 [UnB-237985].

Etymology: This name is given in homage to the Professor of Entomology Francisco Racca Filho, Universidade Federal Rural do Rio de Janeiro.Thank you, my dear friend, for your friendship and all specimens collected in the backyard of your house in the Miguel Pereira mountains.

Male: Measurements: Body length: 7.7 mm; wing: 6.99 mm ( Fig. 1 ). Body brownish, uniformly covered with short pilosity; thorax with four conspicuous dark brown stripes or inconspicuous in newly emerged specimens ( Fig. 2 ). Head: hemispherical; eyes holoptic, glabrous; ocellar triangle prominent, with small ocelli. Mouthparts are vestigial with short 1-segmented brownish-black palps. Antennae light brown, except flagellum, brown to dark brown; scape and pedicel with long dark setae. Pedicel longer and wider than scape; flagellum with three flagellomeres ( Fig. 2 ). Thorax: mostly light brown, densely setose, with four longitudinal stripes ( Fig. 2 ), extend from pronotum to base of the scutellum. Scutellum trapezoidal with posterior margin rounded. Legs mostly yellowish-brown; coxae, trochanters and femora uniformly covered by short setae; tibiae club-like with base narrowed and apex enlarged, more conspicuous in hind legs ( Fig. 1 ); tarsomeres (I-V) longer than tibiae, covered base of insertion of gonostylus ( Fig. 4 ). Gonocoxites wide and tubular, short; gonocoxites apodems subparallel,not exceeding anterior margin of genital capsule. Gonostylus rectangular,slightly curved inwards and densely covered with long black setae; concave in dorsal surface. Phallus tubular with distal extremity rounded bears two conspicuous apical setae; basal extremity truncated. Parameral sheath and ejaculatory apodeme well developed ( Fig. 5 ).

Female: Measurements: Body length: 15.84 mm; wing: 14.65 mm ( Fig. 9 ). Differs from male in the following aspects: Body brownish, mostly covered with short setae; body length twice, or more, greater than male. Head: eyes dichoptic ( Fig. 10 ), with short and sparse setae; ocellar triangle strongly prominent, with reddish ocelli. Front almost as wide as long, with a longitudinal depression that reaches base of antennae. Antenna with pedicel wider than all other segments and with short setae; flagellum narrowed, second and third flagellomeres dark brown to black ( Fig. 10 ). Thorax: with four conspicuous large dark brown stripes ( Fig. 10 ). Femora with basal ⅔ dark brown and distal ⅓ brownish yellow, tibiae with the basal ⅓ brownish yellow and distal ⅔ dark brown ( Fig. 10 ). Wings: dark brown veins, membrane of wing around veins and discal cell (d) strongly darkened, venation similar to male ( Fig. 11 ). Abdomen: very long, little sclerotized and inflated,wide at base and tapering at apex to form a long ovipositor; abdominal sternites short, seg - ments 1-4 brownish, segments 5-10 dark brown to black ( Fig. 9 ); terminalia with 2-segmented cerci ( Figs. 12-14 ), yellowish, and covered by long setae ( Fig. 14 ); genital fork rectangular, fork arms tapering ( Figs. 12, 14 ); two lateral oviducts, membranous ( Figs. 12, 14 ); spermathecae with three long glandular ducts, each one bears with a valve in distal ⅓, ending in a spermathecal capsule, semi-spherical and strongly sclerotized ( Figs. 12, 13 ).

Geographical distribution: BRAZIL, Rio de Janeiro, City of Miguel Pereira, City of Valença ( Fig. 15 ).

Figures

Figure 15.Chiromyza raccaisp.nov.(15) records of geographicaldistribution in Rio de Janeiro mountains. with short and dark setae; claws black and well developed. Wings: longer than length of body (Fig. 1), round- ed at apex; hyaline membrane with very short microtrichia; vein Sc present; veins R1 and R₂₊₃ evanescent, transverse vein r-m present, short; R₄₊₅ present and reaching wing margin above apex; discal cell (d) well-developed, trapezoidal; veins M1, M2, M4 present and reaching posterior margin of wing; cua present; CuA+CuP reaching anal margin of wing (Fig. 11). Abdomen: light brown, with eight segments little sclerotized, slender and elongated; terminalia with genital capsule composed by the epandrium, proctiger and cerci dorsally (Fig. 3) and hypandrium, gonocoxites, gonostylus (Fig. 4) and phallus (aedeagus) (Fig. 5). Epandrium and proctiger with rounded margins, mostly covered by long brown setae. Cerci long and cylindrical, densely covered by fine brown setae (Fig. 3). Hypandrium with posterior margin triangular with margins folded inward, apex extending beyond

Figures 1-8. Chiromyza raccaisp.nov.(1) habitus in lateral view(Holotype male),(2) headand thorax in dorsalview (Holotype male,scale = 1 mm),(3) epandrium and cerciin dorsalview,(4)terminalia indorsal view,(5) phallus,parameral sheath and ejaculatory apodemein dorsal view,(6) phallusof C.ochracea indorsal view, black arrow indicating flat surface;(7) phallusof C.vittata, black arrowindicating rugose surface;(8) phallus of C.raccai sp.nov.black arrow indicating apical setae. Abbreviations:Male genitalia:cerc = cercus;ejapod =ejaculatory apodeme;epand = epandrium;goncx = gonocoxite;goncx apod = gonocoxal apodeme;hypd = hypandrium;ph = phallus;pm sh = parameral sheath.

Figures 9-14. Chiromyza raccai sp.nov.(Paratype, female) (9) habitus in lateral view,(10) head and thorax in dorsal view,(11) right wing in dorsal view,(12) terminalia and spermathecae, (13) duct and spermathecal capsule, (14) epandrium,cerci, genital fork, oviducts and capsular ducts of spermathecae. Abbreviations: Female genitalia:cap dct = capsular duct;cerc = cercus;epand = epandrium;gen fk = genital fork; lat ovid = lateral oviduct;spmth cap = spermathecal capsule; vl = valve.Wing:A₁ = first branch of anal vein;br = basal radialcell;C = costal vein;Cu = cubital vein;CuA = anterior branch of cubital vein;cua = anterior cubital cell; CuA+CuP = anterior branch of cubital vein + posterior branch of cubital vein;CuP = posterior branch of cubital vein; d = discal cell; h = humeral cross vein; M = medial vein;M₁ = first medial branch; M₂ = second medial branch;M₄ = fourth medial branch;m-cu = medial-cubital cross vein; m-m = medial cross vein; R₁ = anterior branch of radius;R₂₊₃ = fused second and third radialbranch;R₄₊₅ = third longitudinal vein;r-m= radial-medial cross vein;Sc = subcostal vein.