Mberu periotoi sp. nov.

(Figs 16, 17)

Description. Male. Body length: 2.21–2.28 mm. Wing length: 2.02–2.19 mm long, 0.68–0.72 mm wide (n = 3). Similar to M. amorimi sp. nov. in both general habitus and chaetotaxy, except as noted. Head (Fig. 16B, C). Pair of reclinate, slightly divergent, strong oc s, almost 1.5 as long as vt s; pair of proclinate, convergent vt s; postpedicel brown, about 1.2 times longer than basal width; stylus about 3.9 times longer than postpedicel; face with dense silver pruinosity. Thorax (Fig. 16C). As in M. amorimi sp. nov. Wing. RMx ratio = 2.6, CuAx ratio = 0.3. Legs. Leg I. It1 smaller than remaining tarsomeres combined. Leg II. Tibia II with major setae at dorsal 1/4 and 1/2, one dorsal, one ventral, and one anterior apical seta; posterior surface of IIt1 with row of 4–5 setae. Relative podomere ratios: I: 6.7/ 7.1/ 3.6/ 2.1/ 1.5/ 1/ 0.9; II: 8/ 8/ 5/ 2.8/ 1.8/ 1/ 1; III: 6.9/ 8.4/ 2.1/ 2.4/ 1.6/ 1/ 1. Abdomen. As in Mberu amorimi sp. nov. Hypopygium (Fig. 17). Epandrium elongate, twice longer than high, dark (Fig. 17A, B). MEp digitiform, ventrally swollen, approximately four times less than VSur height, with dorsal face straight, (Fig. 17C). DSur and VSur covering internal appendages (Fig. 17A, B); VSur (Fig. 17C) enlarged, twice higher than DSur, sclerotized at apex, with three apical setae, probably being LEp fused with VSur (see Quevedo et al. 2025); DSur (Fig. 17D) elongated and curved, apically rounded, three times wider than height, conspicuously projecting beyond VSur. Hypandrium basally fused to epandrium. Phallus straight, without apical projection (Fig. 17F). Postgonite absent. Cercus (Fig. 17E) divided in two parts, ventral part curved and stout, with 6–7 spines ventrally and 1 long and flattened anterior seta, dorsal part rounded, covered by fine setae. Female. Body length: 2.28–2.53 mm. Wing length: 2.30–2.46 mm long, 0.74–0.82 mm wide (n = 5). Similar to male, except as noted. Head. Face broader (about as broad as ocellar tubercle). Thorax. Three strong white prepst s. Wing. RMx ratio = 4.3, CuAx ratio = 0.3. Legs. Leg II. Tibia II with major setae at dorsal 1/3 and 2/3, and av at 2/3; IIt1–4 with one av, one ventral and one pv small black seta at apex; posterior surface of IIt1 without row of setae. Relative podomere ratios: I: 6.8/ 7.3/ 3.4/ 2.4/ 1.5/ 1/ 1; II: 8.8/ 8.7/ 5.5/ 3/ 1.8/ 1/ 1; III: 8.5/ 9.4/ 2.6/ 3.4/ 1.9/ 1.3/ 1. Abdomen. Tergites 1–5 covered by short setae. Oviscapt as in M. bodoquena sp. nov.

Type material. HOLOTYPE ♂, “ BRASIL, SP [São Paulo], Luiz Antônio, | E.E. [Ecological Station] Jataí, Cerrado [Savanna], malaise I | 07.vii.2006, Perioto, N. col.”; “HOLOTYPE | Mberu periotoi | Silva, Capellari & Oliveira [red label]” (MZUSP) . Holotype in good condition, genitalia not dissected. PARATYPES. Brazil. São Paulo. Same data as holotype (1 ♂, dissected, 2 ♀, one dissected, MZUSP). Conchas, Juquiratiba, Faz. Boa Vista, 22°59′1.8″S 48°6′8.8″W, Malaise. Pomar, 17–19.i.2022, Capellari leg.” (1 ♂, dissected, 3 ♀, MZUSP) .

Etymology. Named after Brazilian entomologist Nelson Perioto, who collected the holotype of the species.

Remarks. Mberu periotoi sp. nov. is similar to M. amorimi sp. nov. but can be easily separated by DSur elongated and curved, apically rounded, three times wider than height, conspicuously projecting beyond the VSur (Fig. 17A, B, D). In M. amorimi sp. nov., the size of both surstyli are similar (Fig. 9A, B, D).

Distribution (Fig. 24). Brazil: state of São Paulo (Cerrado biome).