Centistes hexagonalis Almeida & Penteado-Dias, 2025

Centistes hexagonalis Almeida & Penteado-Dias sp. nov.

( Figs. 13A–E View FIGURE 13 )

Diagnosis: Vein (RS+M)a absent; pit on mesoscutum absent; ocellus-ocular distance 1.2 × ocellar diameter; propodeum with dorsal areola present but weakly defined; ventral areola hexagonal; hypopygium rounded; sparsely setose and weakly sclerotized ventrally; ovipositor sheath weakly pubescent basally; apically with dense and long setae; and pronotum yellow.

Comments: Centistes hexagonalis is similar to C. curvicaudatus Aguirre, Almeida, & Shaw , as both share the absence of the pit in the mesoscutum, absence of the vein (RS+M)a, and the precoxal sulcus being poorly defined. C. hexagonalis can be distinguished by having a rounded hypopygium instead of the distinctively sinuate hypopygium as in C. curvicaudatus .

Description. Female Body length: 3.3 mm, mesosoma length 1.4 mm. Head ( Figs. 13A, C View FIGURE 13 ): Antenna with 27 flagellomeres; occipital carina complete; scape cylindrical; face setose and punctate, its minimum width 1.5 × clypeus width; face height 0.8 × its maximum width; clypeus rugulose, its height 0.6 × width; gena smooth and setose; frons smooth and polished; vertex smooth with sparse setae; mandible overlap 0.51 × mandible length; basal width of mandible 0.5 × its length; malar space 0.2 × eye height; malar space 0.9 × basal width of mandible; eye height 1.5 × its length; ocell-ocular distance 1.2 × ocellar diameter; temple length 0.8 × eye length in dorsal view. Mesosoma ( Figs. 13C–D View FIGURE 13 ): Pronotum in lateral view mostly smooth and glabrous, with just a few setae on its borders; pronotum with subparallel transversal carinae, mostly restricted to anterior ventral margin but one carina longer and almost reaching dorsal margin; mesonotal lobes smooth and mostly glabrous except median lobe setose anteriorly; pit on mesoscutum absent; mesoscutum width 1.1 × its length; notauli absent; scutellar sulcus with a transverse carina; scutellum sparsely setose; posterior scutellar depression bifoveolate; mesopleuron smooth and mostly glabrous, with sparse setae on its borders; precoxal sulcus wide and very shallow, with a faint scrobiculate sculpture; metapleuron carinate-rugose with dorsomedial area smooth; projection of metapleuron absent; propodeum not truncated, medial and lateral longitudinal carinae complete, dorsal transverse carina complete, dorsal areola present but weakly defined, ventral areola hexagonal; propodeum sparsely setose and mostly smooth with area surrounding median longitudinal carina rugose. Legs ( Fig. 13B View FIGURE 13 ): Tarsal claw simple; hind coxa costate and setose. Wings ( Fig. 13B View FIGURE 13 ): Vein (RS+M)a absent; stigma length 1.0 × vein R1 length; vein r length × 0.1 stigma length; vein CUa 0.2 × vein CUb. Metasoma ( Figs. 13D–E View FIGURE 13 ): T1 with medial and lateral longitudinal carinae complete; T1 length 1.7 × ovipositor sheath length; ovipositor sheath long, weakly lanceolate, with a thin border, weakly pubescent basally, apically with dense and long setae; sheath length 3.04 × its width; hypopygium rounded, sparsely setose. Coloration ( Fig. 13B View FIGURE 13 ): body mostly dark brown with clypeus, gena, legs, pronotum, propleuron and mesopleuron ventrally yellow.

Male: Unknown.

Examined Material: Holotype female: Itatiaia, RJ, Brazil, PARNA de Itatiaia , Projeto pensa Rio-Hympar, S 22° 24’ 10.6” W 44° 38’ 28.3”, Armadilha Malaise 06, 2061 m, 07.vii.2013, R.F. Monteiro col. DCBU 100903 View Materials . GoogleMaps

Paratypes: None.

Etymology: The specific epithet of this species is derived from the hexagonal shape of its propodeal areola.