Hamayulus porangajuba Mendes, Sobral & Silva-Neto, 2025

Hamayulus porangajuba Mendes, Sobral & Silva-Neto View in CoL sp. nov.

Figures 1–9 View FIGURE 1 View FIGURE 2

Diagnosis. Cerci with an enlarged basal half and a slender, inwardly curved apex ( Figs. 1 View FIGURE 1 , 2E–G View FIGURE 2 ). Abdominal coloration yellowish laterally and ventrally, with a distinct triangular yellow spot dorsally on tergite IX and yellowish cerci ( Figs. 1 View FIGURE 1 and 5 View FIGURE 5 ).

Description. Holotype Male.

Head. Head big, broad and generally smooth, in frontal view ( Fig. 2B View FIGURE 2 ); genal region marked by straight depression, in frontal view; fastigium-vertex small and dorsally compressed, in frontal view ( Fig. 2B View FIGURE 2 ); Eyes small and globular ( Figs. 2A–B View FIGURE 2 ). Mandibles slightly asymmetrical, with the right mandible larger; mandibles long, exceeding length of cephalic upper half, in frontal view ( Fig. 2B View FIGURE 2 ); Clypeus and labrum very large, with labrum entirely covering mandibles distally, in frontal view ( Fig. 2B View FIGURE 2 ).

Thorax. Pronotal disc rectangular, without carina; anteriorly concave, laterally sinuous and posteriorly concave; margins of pronotal disc elevated, outlining its shape and giving it a saddle-like appearance, in lateral and dorsal views ( Figs. 2C–D View FIGURE 2 ); Dorsolateral suture slightly curved, posteriorly reaching furcal suture and ventral margin of pronotum ( Figs. 2C–D View FIGURE 2 ). Furcal suture curved and concolorous with pronotal disc ( Fig. 2C–D View FIGURE 2 ). Mesobasisternum and metabasisternum triangular in shape, anteriorly concave and posteriorly narrowed, with short, subtriangular lateral lobes forming two small round projections.

Wings. Tegmina extremely reduced, triangular, retaining only stridulatory file region; both right and left tegmina with stridulatory file ( Fig. 3).

Left stridulatory file curved, with short, broad, and closely spaced teeth; teeth at apex and base smaller ( Fig. 4A View FIGURE 4 ). Total length of left stridulatory file 1.8 mm; greater vein width 0.2 mm; total of 164 teeth ( Fig. 4A View FIGURE 4 ). Right stridulatory file straight, with morphology similar to left file ( Fig. 4B View FIGURE 4 ). Total length of file 1.1 mm; widest vein 0.1 mm; total of 127 teeth ( Figs. 4B View FIGURE 4 ).

Legs. All femora straight ( Fig. 2A View FIGURE 2 ). Fore femur with five pairs of small ventral spines ( Fig. 2A View FIGURE 2 ). Fore tibia straight, with apical region slightly curved; ventrally with five long pairs of straight spines, and dorsally with a single spine beyond tympanal area. Tympanal área expanded, with open tympana consisting of two elliptical cavities ( Fig. 2A View FIGURE 2 ).

Mid femur with five pairs of small ventral spines, in lateral view ( Fig. 2A View FIGURE 2 ). Mid tibia straight, with five pairs of long ventral spines, and two isolated dorsal spines, one located near base of medial portion, and other at apical region, in lateral view ( Fig. 2A View FIGURE 2 ).

Hind femur elongated, narrow, and expanded at basal half, with several ventral spines increasing in size from base to apex ( Fig. 2A View FIGURE 2 ). Hind tibia straight, narrow, with several small ventral and dorsal spines ( Fig. 2A View FIGURE 2 ). All legs with short bristles; fore and mid femora with short, dark, thicker setae with rigid appearance ( Fig. 2A View FIGURE 2 ).

Abdomen. Cerci with basal half expanded and straight; apical half slender and curved inward, in dorsal and ventral view; in lateral view, apical half curved, with apex directed upward; cerci with several long bristles ( Figs. 2E View FIGURE 2 –|G). Subgenital plate trapezoidal, laterally concave and posteriorly bilobed, with wide and V-shaped medial notch ( Fig. 2F View FIGURE 2 ). Styli short and elliptical ( Fig. 2F View FIGURE 2 ).

Internal male genitalia. Not examined.

Coloration. Described based on photographs of live specimen ( Fig. 5 View FIGURE 5 ). General body coloration light green with dark green areas. Eyes purple, with yellowish margins. Palps bluish-green. Legs greenish-brown; leg spines light brown. Tegmina light brown, with stridulatory file region dark brown. Abdomen dorsally light green, with dark green spots; apical region of abdomen dorsally and ventrally yellowish, with bright yellow triangular dorsal spot on penultimate abdominal segment. Cerci dark brown, with light brown apices.

Female: Unknown.

Nymph. One older female nymph ( Fig. 6A–B View FIGURE 6 ) and two younger male nymphs were found ( Fig. 6C View FIGURE 6 ). All are very similar to adults, with slender bodies and very long legs, except that morphology of tegmina and terminalia are not developed. Eyes with color light purple and palps bluish-green; head and thorax light green; abdomen whitishgreen, with each abdominal segment bearing a pair of round yellow dorsal spots. Older female nymph with elongate, straight ovipositor with acuminate apex ( Fig. 6B View FIGURE 6 ). Cerci with basal Half broad and apical half acuminate and narrow ( Fig. 6B View FIGURE 6 ).

Etymology. The specific epithet is in apposition. Porangajuba derives from the Brazilian Tupi indigenous language, combining poranga (beautiful) and juba [îuba] (yellow), meaning “beautiful yellow”. This name refers to the yellowish coloration at the apex of the abdomen in H. porangajuba sp. nov.

Geographical records. Brazil: Bahia ( Fig. 9 View FIGURE 9 ).

Type material. Holotype ♂. BRASIL, Bahia, Esplanada, Rodovia Linha Verde , Cachoeira dos Índios, 12°10’30.3”S — 37°49’12”W, 13.i.2025, coleta manual na vegetação, D.M.M. Mendes & A.M.S. Neto leg. ( 1♂ INPA) GoogleMaps . Paratypes: Idem (1 nymph ♂ — IDSM and 1♂ 1♀ nymphs— INPA) .

Measurements (mm). Holotype ♂: TL: 19,2; TegL: 1,8; WF: 3,2; PL: 3,5; FF: 11,9; FT: 13,7; MF: 9,4; MT: 10,1; HF: 18; HT: 21,8; Lplac: 1,5; LC: 1,1.

Habitat. Hamayulus porangajuba sp. nov. was collected in a fragment of old secondary Atlantic Forest, in a lowland area characterized by depressed relief, permanently moist soil, and frequent watercourses ( Fig. 7 View FIGURE 7 ). The type locality of H. porangajuba sp. nov. is bordered by a small stream. The shrub vegetation in the area is dense, with an abundance of lianas and species of Araceae , both epiphytic and terrestrial. Specimens of H. porangajuba sp. nov. were found individually on the abaxial part of large leaves of palms ( Arecaceae ) and tajas ( Araceae ), at heights ranging from 1.5 to 1.7 m above the ground ( Fig. 6 View FIGURE 6 ).

Comments. Fialho et al. (2014) reported the existence of a second species based on molecular analyses of nymphs from the same locality as H. rufomaculatus , but unfortunately, because they were nymphs, this second species was not described by the authors. The type locality of H. porangajuba sp. nov. is about 800 km from the type locality of H. rufomaculatus and, due to this great distance, the nymphs found by Fialho et. al (2014) are possibly not conspecific with the new species described here.