Zygothrica japunibaensis, Mendes & Blauth & Gottschalk, 2021

Mendes, Mayara F., Blauth, Monica L. & Gottschalk, Marco S., 2021, Three new species of Zygothrica (Diptera: Drosophilidae) from the Neotropical region, Brazil, Revista Brasileira de Entomologia (e 20210059) 65 (3), pp. 1-10 : 2-4

Zygothrica japunibaensis sp. nov.

( urn:lsid:zoobank.org:act:DABA9659-236C-4C35-8C6E-D56405244409 )

( Figures 1-3; 10A)

Type-series. Holotype ♂ labeled “ Zygothrica japunibaensis sp. nov. Mendes et al. HOLOTYPE ♂ ”, “[ Brazil], E[stado] do Rio [de Janeiro], Angra [dos Reis], Japun[í]ba, L. Trav. F; VII.[1]936; Col: L. Trav. ”. Abdominal sclerites and terminalia in vials with glycerine; wing was removed and mounted on a permanent microscope slide and all material was attached to the specimen.

Type locality. Japuníba, city of Angra dos Reis, State of Rio de Janeiro, Brazil .

Diagnosis. Body color mainly brown; mesonotum brown with two yellow narrow stripes in the line of the dorsocentrals, extending up to 2/3 of the length of mesonotum; acrostichal setulae in 6 lines; whitish-yellow pleurae; abdomen brown pollinate, tergites III and VI lighter; arista with 5 dorsal branches, 1 ventral and 3 short inner branches, plus terminal fork; first flagellomere ochre, hairy, length about 2.5x the length of the pedicel; facial carina prominent, ochre; legs yellow, apex of tibia darker; wings with apical spot, dM-Cu infuscated, mid-radial spot reaching R 2+3 and proximal radial-medial spots.

Description. ♂

Head. Brown; head width = 0.9mm, slightly wider than thorax (hypercephalic).Eyes dark red, bare.First flagellomere ochre, hairy,length about 2.5x the length of the pedicel, and about 2x the width. Aristae with 5 dorsal branches, 1 ventral and 3 short inner branches, plus the terminal fork. Orbital plates yellow. Orbital bristles dark brown. Distance between or1 and or2 about 60% of the distance between or1 and or3. Frons brown; ocellar triangle slightly darker, covering 1/3 of the length of the frons; length of the frons about 1.5x the anterior width; posterior width of the frons about 2/3 of the anterior width. Brown median frontal vitta almost reaching the ptilinal fissure; postocellar bristles convergent. Face and gena ochre. Proboscis ochre, with lighter palps.

Thorax. Mesonotum brown, with two narrow stripes in the line of the dorsocentral, extending up to 2/3 of the length of mesonotum; 6 lines of parallel acrostichal setulae. Notopleura, supra-alar area and postalar callus yellow. Scutellum brown, marginally yellow. Basal scutellar setae converging. Pleurae yellow. Legs yellow, apex of tibia darker. Thorax length = 1.04mm. Thorax width = 0.66mm.

Wings. Membrane with color pattern as follows:apical spot, dM-M infuscated, mid-radial spot reaching R 2+3 and proximal radial-medial spots. R 2+3 straight toward C, R 4+5 and M slightly convergent, both slightly curved posteriorly. Halters yellow. Indices: C = 1.80; ac = 3.87; hb = 0.70; 4c = 0.93; 4v = 1.22; 5x = 1.00; M = 0.25; prox x = 0.43. Wing length = 2.13mm.

Abdomen. Light brown; tergites I, II, V and VI darker than tergites III and IV.

Terminalia. Epandrium rounded not microtricose, longer than hypandrium; ventral lobes small with 4 bristles. Cerci free, microtricose, with long bristles. Hipoproctal plate (sensu Grimaldi, 1987) present. Ventral cercal lobes (sensu Grimaldi, 1987) membranous.Surstyli rounded, with 10-14 prensisetae arranged in crescent format. Subepandrial sclerite previously projected ahead. Postgonites (gonopods sensu Grimaldi, 1987) square-shaped, with one prominent bristle and fused to the hypandrium. Pregonites (paraphysis sensu Grimaldi, 1987) fused to postgonites and without obvious bristles. Hypandrium V-shaped. Phallus (basiphallus + distiphallussensu Grimaldi, 1987) tubular, with basiphallus narrower than distiphallus, with an indent in the apex, bare; length of the phallus about 3x the width of distiphallus; basiphallus fused to the phallapodeme (aedeagal apodeme sensu Grimaldi, 1987). Phallapodeme shorter than phallus.

♀ Unknown.

Geographic distribution. Known only from type locality.

Etymology. The species epithet refers to the type locality of Japuníba, situated in the city of Angra dos Reis, State of Rio de Janeiro, Brazil.

Comments: The phallus is similar to Z.nigropleura Grimaldi 1987 , but the distiphallal scales are absent and the length of the phallapodeme is smaller in relation to the phallus in Z. japunibaensis sp. nov.