Separatula araguaiensis sp. n.

Figures 1A, 11, 12E

Diagnosis: The new species is promptly differentiated from its congeners by the combination of the following characters: cerciform process short, divided and triangular; cercus much longer than subgenital plate, curved in all extension; and subgenital plate longer than wide.

Etymology: The specific epithet refers to the type locality, Conceição Araguaia, Pará State, Brazil.

Description: Holotype male (Fig. 11, 12E): Small to medium, yellowish with legs crimson (Fig. 11A). Head (Fig. 11B, C): Fastigium of the frons triangular with large base; ocellus on middle with reddish margins. Antennal sockets dilated at base; with reddish margins. Fastigium of the vertex hourglass shaped; globose at apex; sulcus on middle shallow, not reaching apex. Occiput, vertex, pedicel, scape and superior part of gena reddish. Thorax: Pronotal disc (Fig. 11C) crimson with a medial yellow stripe; anterior margin straight; furcal sulci bell-shaped; same width from anterior to posterior region. Lateral lobes (Fig. 11D) almost as long as pronotal disc, as long as wide; with reddish marks; anterior margin straight, posterior margin almost straight; humeral sinus presenting an angle of ca. 80º, very evident. Tegmina (Fig. 12E) shorter than hindwings; anal and costal margins parallel; Sc almost straight; R with none major bifurcations; M long, following R in all extension; MP leaving M before the middle of the tegmina; MA without bifurcations; CuA very long almost straight, with none bifurcations; stridulatory area and anal margin reddish (Fig. 11F, G). Mesobasisternum (Fig. 11E) a little elevated on middle; anterior margin almost straight; lateral lobes small, demilune shaped. Metabasisternum (Fig. 11E) triangular; anterior margin convex; lateral lobes demilune shaped, almost touching in the posterior margin. Abdomen: Tergite X with posterior margin straight; bearing two lateral processes, moderately curved upwards, spine like. Epiproct quite large; lateral proximal margin expanded; projected downwards in a triangular process. Cercus (Fig. 11H, I) moderately long, at least twice as long as lateral processes of tergite X; moderately curved inwards. Subgenital plate (Fig. 11H, I) longer than wide; posterior margin v-shaped; bearing two small styli. Genitalia (Fig. 11J, K): Phallus symmetrical, rounded, completely membranous; ejaculatory vesicles large, sub-oval; dorsal lobe larger than ventral lobe, tip cup-like.

Type Material: Holotype male, ‘CONCEIÇÃO ARAGUAIA \ Pará Brasil VII–1959 \ M. Alvarenga’, ‘ DZUP 366677 ’.

Measurements (mm): Holotype: BL: 12; TegL: 16; HW: 2.5; PrL: 2.5; PrH: 2.7; FLiii: 15.5; TLiii: 16.5; SPL: 2.2; CL: 2.3; SFL: 0.9; TN: 37.

Remarks: The new species is probably closely related to Separatula wilsoni Cadena-Castañeda, and is distinct in: possessing a long subgenital plate bearing thin styles that do not touch each other; triangular and straight cerciform processes, smaller than cerci, instead of forceps-like, curved and longer than cerci; cercus curved continually, instead of curved at apex. Separatula araguaiensis is distinct from S. adunca Gorochov and S. falcata (Giglio Tos) by: the cercus much longer than the subgenital plate; cercus thinner and curved in all extension, instead of cercus thick and curved in the apex; possessing a subgenital plate longer than wide, instead of as long as wide. Differs from S. adunca by the cerciform process, and from S. falcata by the cerciform process being triangular, straight and short, instead of forceps-like, curved and elongate. This is the first record of the genus Separatula for Brazil (Fig. 1A), the new species altogether with the others of the genus inhabits the northern region of South America.