Hypoxys flexuosus sp. n.

(Figures 8A–E, 19C–D, 21A)

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Material examined (n=5). Holotype ♂: PERU. Amazonas. Rio Santiago, 20.XI.1924, H. Bassler leg. (USNM) . Paratypes: PERU. Iquitos: ♂ Rio Maranon, 7.XI.1927, H. Bassler leg. (USNM) ; ♀ Amazon River, 21.II.1927, H. Bassler leg. (USNM) ; Amazonas: 1 specimen without abdomen, same data holotype (USNM); same data: ♀ 27.XI.1924 (USNM) .

Measurements. Total length: 14.7–17.2; head length: 1.8–1.9; head width: 3.1–3.3; pronotal length: 2.6–2.9; pronotal width: 9.0–10.2; scutellum length: 7.2–8.1; scutellum width: 5.0–5.7; abdominal width: 8.2–9.3; length of antennal segments. I: 0.9–1.0; II: 2.0–2.2; III: 1.2–1.5; IV: 4.7–5.0; V: missing.

Diagnosis. Anterolateral margin of pronotum with solid black stripe along all its extension. Anterolateral margin punctured dorsally. Cicatrices of pronotum with black punctures delimiting anterior sulci (Fig. 19C). Scutellum with anterior margin yellow (Fig. 19C). Body ventrally with stripes dark brown (Fig. 19D). Male genitalia (Fig. 8A–D). Pygophore with dorsal rim excavated (Fig. 8A). Superior process of genital cup subrectangular with both ends rounded; close to dorsal rim; visible in dorsal view (Fig. 8A–C). Paramere sinuous, twisted; anterior lobe digitiform, dorsally projected (Fig. 8A–C); posterior lobe almost inconspicuous; stalk with inner face carinated, carina ending at the apex of anterior lobe (Fig. 8B–C). Proctiger with dorsolateral dense tufts of long setae separated by an almost glabrous broad bridge; posterior face somewhat swollen, barrel-shaped (Fig. 8A–D). Ventral rim median excavation in “V”; expansions well-developed, large, acuminated, surpassing level of posterolateral angles in ventral view (Fig. 8D). Female genitalia (Fig. 8E). Valvifers 8 subtrapezoidal; posterior margin almost straight and sloping; inner angle rounded and projected over valvifers 9; inner margins dark with small, distal, bottle-shaped excavation. Valvulae 9 barely exposed.

Comments. The male genitalia of H. flexuosus resembles H. dolosus and H. eburatulus (Nunes et al. 2020, Figs. 4B, 5B) because paramere has anterior lobe long and curved dorsally and posterior lobe not developed; superior process of genital cup squared; and posterior face of proctiger somewhat swollen (Fig. 8B–C). But H. flexuosus differ from both by paramere twisted and superior process of genital cup subrectangular (Fig. 8B–C). Female genitalia of H. flexuosus, on the other hand, is not similar to H. dolosus or H. eburatulus, but similar to H. excavatus, H. boerneri and other species with valvifers 8 with medial excavation elliptical (Figs. 8E, 7E).

Etymology. Name refers to the sinuous parameres ( flexuosus =full of bends).

Distribution (Fig. 21A). PERU: Iquitos, Amazonas.