Rhinoleucophenga trivisualis, Poppe, Jean Lucas, Schmitz, Hermes José & Valente, Vera Lúcia Da Silva, 2015

Poppe, Jean Lucas, Schmitz, Hermes José & Valente, Vera Lúcia Da Silva, 2015, The New World genus Rhinoleucophenga (Diptera: Drosophilidae): new species and notes on occurrence records, Zootaxa 3955 (3), pp. 349-370 : 351-354

Rhinoleucophenga trivisualis sp. nov.

( Figures 2 a–e; 3a–d; 4a–c)

Type series. Holotype: 1♂ labelled “ Rhinoleucophenga trivisualis ; HOLOTYPE ♂; Brazil, Bahia, Estação Ecológica Raso da Catarina/ Município de Paulo Afonso. 9°30'39"S 38°32'12"W, 22.iv.2012 col.: GF Oliveira; banana bait”. Postabdomen of holotype dissected, stored in microvial with glycerin, stored on the same pin with the respective specimen. Paratypes: 2♂ and 2♀ labelled “ Rhinoleucophenga trivisualis ; PARATYPE; Brazil, Bahia, Estação Ecológica Raso da Catarina/ Município de Paulo Afonso. 9°30'39"S 38°32'12"W, 22.iv.2012 col.: GF Oliveira; banana bait”. Holotype and paratypes are deposited at CEIOC /Fiocruz.

Diagnosis. Head covered with ca. 26 scattered interfrontal setulae, eyes with three transverse light stripes (well noted when the specimen is preserved in alcohol). Scutum and scutellum brownish covered with small dark brown spots ( Fig. 2 b), pleura yellowish with two large dark brown longitudinal stripes, abdomen yellowish with brown stripes in each tergite medially widely interrupted and laterally connected ( Fig. 2 a–b). Wings hyaline ( Fig. 2 c). Male terminalia as in Figure 3 a–d.

Description. ♂. Head ( Fig. 2 a; 2d–e). Front brownish, covered with ca. 26 scattered interfrontal setulae, frontal length 0.57mm (0.56–0.58); frontal index = 1.14 (1.12–1.16); top-to-bottom width ratio = 1.09 (1.06–1.12); ocellar triangle to front length ratio = 0.42 (0.38–0.46); or1/or3 ratio = 1.08 (1.07–1.09); or2/or1 ratio = 0.61 (0.58– 0.64); vibrissal index = 0.43 (0.36–0.50). Carina prominent. Cheek index = 8.10 (6.7–9.50). Eye index = 1.31 (1.27–1.35). Antenna with the tip of flagellomeres darker brown, arista with short branches, 12 dorsal branches and 10 ventral branches plus terminal fork. Palpus yellowish with ca. 15 setae on lower part. Eyes with three transverse light stripes ( Fig. 2 d) (well noted when the specimen is preserved in alcohol).

Thorax ( Fig. 2 a–b). Thorax length 1.60mm (1.52–1.68). Scutum and scutellum brownish; scutum covered with many small dark brown spots. 10 rows of acrostichal setulae. 2 pairs of prescutellar acrostichal setae, the central pair strongest, about 56% (48–64) of posterior dorsocentral setae. Postpronotum with one setae. Transverse distance between dorsocentral setae 3.32x (2.80–3.85) longitudinal distance. Basal scutellar setae divergent. Sterno index = 1; median katepisternal setae absent. Halteres whitish. Legs yellow with brown annuli subdistally on femora and basally on tibiae.

Wings ( Fig. 2 c). Hyaline. Length 2,92mm (2.85–3.00); width 1.22mm (1.20–1.25). Indices: C = 3.72 (3.36– 4.09); hb = 0.49 (0.40–0.59); Ac = 1.26 (1.15–1.38); 4c = 1.12 (1.00–1.25); 4v = 3.10 (2.95–3.25); 5x = 1.46 (1.42– 1.50); M = 1.02 (1.00–1.05); prox.x = 1.40 (1.36–1.45).

Abdomen ( Fig. 2 a–b). Yellowish, each tergite with broad brown posterior stripes widely interrupted dorsomedially and expanded and connecting laterally.

Body length: 3.62mm (3.50–3.75).

Terminalia ♂ ( Fig. 3 a–d). Epandrium microtrichose, fused with surstyli. Approximately 9 prensisetae. About 6 upper and 20 lower setae on each side of epandrium. Cerci elongate, with ca. 25 setae each, 3–4 longer setae in the apical portion. Aedeagus ring-shaped, with squared aspect in frontal and dorsal view, the apical portion slightly wider than the base. Aedeagus apodeme long and bifurcate in the posterior region.

♀. Head. Same color pattern and setation as in male. Frontal length = 0.51mm (0.50–0.52); frontal index = 1.04; top-to-bottom width ratio = 1.10 (1.08–1.12); ocellar triangle to front length ratio = 0.43 (0.42–0.44); or1/or3 ratio = 0.93 (0.86–1.00); or2/or1 ratio = 0.86 (0.81–0.91). vibrissal index = 0.35 (0.33–0.38). Cheek index = 9.12 (8.75–9.50). Eye index = 1.28 (1.25–1.31). Other characters as in male.

Thorax. Same color pattern as in male. Thorax length 1.52mm (1.50–1.54). 10 rows of acrostichal setulae. 1 pair of prescutellar setae, about 67% (64–71) of posterior dorsocentral setae. Transverse distance between dorsocentral setae 3.6x (3.40–3.80) the longitudinal distance. Sterno index =1. Other characters as in male.

Wings. Hyaline. Length 2.77mm (2.75–2.78); width 1.25mm. Indices: C = 3.05 (2.73–3.38); hb = 0.48 (0.46– 0.50); Ac = 1.60 (1.44–1.76); 4c = 1.12 (1.04–1.20); 4v = 2.48 (2.40–2.56); 5x = 1.23 (1.13–1.33); M = 0.74 (0.68– 0.80); prox.x = 1.06 (1.00–1.12).

Abdomen. Same color pattern as in male.

Body length: 3.25mm (3.10–3.40).

Terminalia ♀ ( Fig. 4 a–c). Cerci long and well sclerotized with 4 longer apical setae on each one. Epiproct with ca. 7 setae, two longer apical ones. Hypoproct with many subequal setae and ca. 6 longer apical setae. Spermathecal capsule slightly elongated, with basal introvert reaching ca. ¾ of inner capsule.

Etymology. The species name refers to its three light stripes on the eyes, which is a peculiar characteristic of this species.

Type locality. Brazil, Bahia, Estação Ecológica Raso da Catarina/ Município de Paulo Afonso (9°30'39"S 38°32'12"W).

Distribution. Known from the type locality, and from Parque Nacional Serra da Capivara, municipality of São Raimundo Nonato, Piauí state, Brazil (Oliveira GF, personal communication).

Biology. Collected in fermented-banana traps, in the Caatinga sensu strictu.

Figures

FIGURE 2. Holotype of R. trivisualis sp. nov. a: general habitus, lateral view; b: general habitus, dorsal view; c: wing; d: eyes with three light stripes (indicated by the arrows, in alcohol); e: head, frontal view (scale bar 1.0 mm in a, b, c and d; 0.5 mm in e).

FIGURE 3. Male terminalia of the holotype of R. trivisualis sp. nov. a – c: aedeagus and aedeagal apodeme. a: dorsal view; b: ventral view; c: lateral view; d: epandrium, cerci and surstyli, caudal view (scale bar: 0.05 mm).

FIGURE 4. Female terminalia of the paratype of R. trivisualis sp. nov. a: latero-ventral view; b: dorsal view; c: spermathecal capsule (scale bar: 0.1 mm).