Centistes singularis Román & Almeida & Penteado-Dias & Shaw & Sarmiento 2025, sp. nov.

Centistes singularis Almeida & Penteado-Dias sp. nov. (Figs. 19A–E) Diagnosis: Vein (RS+M)a absent; notauli and pit on mesoscutum absent; precoxal sulcus absent; and hypopygium strongly protruding ventrally, wedge shaped. Comments: C. singularis is a unique species that can be readily distinguished by its distinctively modified hypopygium (Fig. 19E) Description. Female Body length: 3.51 mm; mesosoma length 1.4 mm. Head (Figs. 19B–C): Antenna with 26 flagellomeres; occipital carina complete; scape cylindrical; face setose and punctate, its minimum width 1.6 × clypeus width; face height 0.6 × its maximum width; clypeus smooth with some sparse and long setae; clypeus height 0.6 × clypeus width; gena smooth with a few scattered setae; frons smooth and polished; vertex smooth with just a few setae; basal width of mandible 0.8 × its length; malar space 0.5 × eye height; malar space 2.0 × basal width of mandible; eye height 1.6 × its length; ocell-ocular distance 1.7 × ocellar diameter; temple length 1.1 × eye length in dorsal view. Mesosoma (Figs. 19C–D): Pronotum in lateral view mostly smooth and glabrous, with just a few setae on borders; transverse sulcus of pronotum absent; pronotum carinae subparallel and horizontal; mesonotal lobes smooth and mostly glabrous except median lobe setose anteriorly; pit on mesoscutum absent; notauli absent; mesoscutum width 1.0 × its length; scutellar sulcus scrobiculate; scutellum sparsely setose; posterior scutellar depression scrobiculate; mesopleuron smooth and mostly glabrous, with sparse setae on its borders; precoxal sulcus absent; metapleuron carinate-rugose with a smooth area medially; projection of metapleuron absent; propodeum with medial longitudinal carina complete, lateral longitudinal carinae and dorsal areola absent, ventral areola pentagonal with two upper depressions; propodeum sparsely setose, mostly smooth, rugulose around carinae. Legs (Fig. 19A): Tarsal claw simple, hind coxa smooth, setose. Wings (Fig. 19A): Vein (RS+M)a absent; stigma length 1.1 × vein R1 length; vein r length 0.1 × stigma length; vein CUa 0.3 × vein CUb. Metasoma (Figs. 19D–E): T1 costate without longitudinal carinae, its length 1.6 × ovipositor sheath length; ovipositor sheath with a normal border, oblong-lanceolate, smooth and polished basally, setose apically; sheath length 2.8 × its width; hypopygium wedge shaped, strongly protruding ventrally, its posterior margin sinuate and well sclerotized. Coloration (Fig. 19A): Body mostly dark brown-black, clypeus and base of antenna yellowish, propleuron and pronotum yellow, legs yellow except hind leg with tibia and tarsus dark brown. 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”, Malaise 6, 2061 m, 12.ii.2015, R.F. Monteiro col., DCBU 113837. Paratypes: None. Etymology: The specific epithet is derived from the singular and distinctive blunt wedge-shape of the hypopygium in this species.