Stenarella nigromaculata, Santos & Bordera, 2025

3.1.14. Stenarella nigromaculata sp. nov.

Figures 1 G View Figure 1 , 17 View Figure 17 , 24 F View Figure 24 , 28 View Figure 28

Etymology.

From the Latin adjective niger, - gra, - grum, meaning “ black ”, and the noun macula, - ae, meaning “ spot, stain ”, in reference to the dark spots at the fore wing, which are unique of this species within the genus.

Diagnosis.

Stenarella nigromaculata sp. nov. can be distinguished from all other Stenarella species by the combination of the following characters: mesoscutum mostly smooth and shiny (Fig. 17 E View Figure 17 ); mesosoma entirely black (Fig. 17 A, D, E View Figure 17 ); wing hyaline with distal half dark brown (Fig. 17 A, C View Figure 17 ).

Description.

FEMALE. Fore wing 11.1 mm long. — Head (Fig. 17 A, B, D, E View Figure 17 ): Mandible, clypeus and face densely covered with very long setae. Mandible punctate, MLW 1.95. Malar space short, MSM 0.45. Clypeus with sparse but distinct punctures, CWL 2.9. Clypeus and face centrally mostly flat. Face coarsely rugose punctate. Frons sparsely punctate, with complete longitudinal carina. Vertex rugose punctate between posterior ocelli. Antenna with 36 flagellomeres. — Mesosoma (Figs 1 G View Figure 1 , 17 A, C – E View Figure 17 ): Pronotum mostly with distinct longitudinal striae, dorsal posterior part smooth and shiny. Epomia strong, reaching pronotal depression. Mesoscutum almost entirely smooth and shiny. Notaulus reaching 0.65 of mesoscutum with distinct transverse striae. Scutellum rugose reticulate. Mesopleuron and metapleuron moderately setose. Mesopleuron dorsally with sinuous striae, ventrally mostly rugulose. Epicnemial carina weak (better seen in ventrolateral view), reaching 0.6 of distance to subtegular ridge. Sternaulus shallow evenly upcurved, reaching anterior 0.6 of mesopleuron. Metapleuron rugulose striate. Propodeum relatively long, dorsal profile in lateral view evenly convex and sloped. Anterior area of propodeum coarsely rugulose reticulate. Propodeal spiracle elliptic, SLW 2.5. Posterior area of propodeum covered by moderately coarse, unevenly spaced transverse striae. Posterior transverse carina of propodeum absent. Areolet small, closed distally by an unpigmented vein 3 rs-m, APH 0.50. Vein 2 m-cu antefurcal to vein 3 rs-m. Hind wing vein Cua longer than crossvein cu-a, HW 1 C 3.0. — Metasoma (Fig. 17 A, F View Figure 17 ): Posterior end of S 1 placed approximately opposite to spiracle of T 1. T 1 LW 3.1; T 1 WW 1.85; T 2 LW 1.3; T 2 WW 2.25. Thyridium about 1.25 times as long as wide. T 2 with shallow and moderately sparse punctures over finely granulate background. Dorsal valve of ovipositor with 5 teeth. Ventral valve with 7 teeth. OST 3.55. — Color (Figs 1 G View Figure 1 , 17 View Figure 17 ): Head mostly black; labrum, base of mandible, facial and frontal orbits, genal orbit dorsally, f 6 – f 10 and proximally f 11, white. Mesosoma black; a spot on posterior medial part of propodeum yellowish. Fore leg mostly pale orange; coxa, trochanter femur ventrally and distal tarsi, brown to dark brown. Mid leg mostly dark brown, femur dorsally orange. Hind leg mostly dark brown to black; base of femur narrowly orange; t 2 – t 3 whitish. Wing hyaline with distal half dark brown. Metasoma black; T 1 – T 3 narrowly banded posteriorly and T 6 – T 8 posterolaterally, whitish. — MALE. Unknown.

Hosts.

Unknown.

Distribution.

Afrotropical. Known records from Central African Republic (Fig. 24 F View Figure 24 ).

Material examined.

1 ♀. Holotype. CENTRAL AFRICAN REPUBLIC • ♀; Prefecture Sangha – Mbaéré; Dzanga – Ndoki National Park; 38.6 km 173º S. Lidjombo , 2º21.60’N, 16º09.20’E; 350 m; 26–27.V.2001; S. van Noort Leg; Malaise trap, lowland rainforest, CAR 01 – M 231 ( SAMC) GoogleMaps . Dry pinned. Distal flagellomeres from f 29 of right antenna missing; mid and hind right legs removed for DNA sequencing.