Phanerotoma nigricornis, Luo & Achterberg & He & Tang & Chen, 2025

Luo, Wen-Juan, Achterberg, Cornelis Van, He, Jun-Hua, Tang, Pu & Chen, Xue-Xin, 2025, Revision of the genus Phanerotoma Wesmael (Hymenoptera, Braconidae, Cheloninae) from China, with descriptions of twenty-four new species, European Journal of Taxonomy 1003, pp. 1-110 : 54-56

Phanerotoma nigricornis sp. nov.

urn:lsid:zoobank.org:act:64FAAF32-1523-4C07-AC31-C11ED880D3FD

Fig. 21

Diagnosis

Face in lateral view with minute spiny protuberances ( Fig. 21C ); clypeus triangular, convex anteriorly and with some longitudinal sculpture ( Fig. 21D ); malar space long, 1.7× as long as basal width of mandible ( Fig. 21D ); POL about as long as diameter of posterior ocellus ( Fig. 21B ); hypopygium apically acute and with short and robust, up-curved triangular protuberance ( Fig. 21J ).

Etymology

Named after the black antennae, from the Latin ‘ niger ’ for ‘black’ and ‘ cornu ’ for ‘horn’.

Type material

Holotype

CHINA – Sichuan • ♀; Wanglang National Nature Reserve ; elev. 2500 m; 25 Jul. 2006; ZJUH No. 200800263.

Description

Female

MEASUREMENTS. Length of body 4.8 mm, of fore wing 4.3 mm.

COLOURATION. Black; veins M+CU, 1-M, 2-SR+M, 2-CU1, 3-CU1, m-cu and anteriorly 2-SR of fore wing, middle tibia with blister, and first and second tergites medially pale-yellow, hind trochanter, femur and tibia apically brown.

HEAD. Width 1.2 × median length in anterior view ( Fig. 21D ) and part of head above eye in lateral view 0.4× height of eye ( Fig. 21C ); antenna with 23 segments, five subapical antennal segments not moniliform ( Fig. 21E ), narrow and slender, area of stemmaticum mainly granulate; OOL:diameter of posterior ocellus: POL=30: 9:9; eye 0.9× temple in dorsal view ( Fig. 21B ); frons with longitudinal rugae medially, rugose laterally and with weak median ridge; vertex granulate-rugose and with satin sheen; temple largely striate and with satin sheen; face with oblique rugae laterally, transverse-rugose medially and with short median ridge; clypeus smooth, shiny and 0.8 × minimum width of face, intertentorial distance 1.8× minimum width between clypeus and eye, long erect setose and with 3 small teeth medio-ventrally ( Fig. 21D ); temple wide, in lateral view 1.1× as wide as temple ( Fig. 21C ), in anterior view its height 0.6 × minimum width of face; upper condyle of mandible far below lower level of eyes ( Fig. 21D ); malar space long, 1.7× as long as basal width of mandible; lower tooth of mandible 0.4× length of apical tooth, small and short ( Fig. 21K ).

MESOSOMA ( Fig. 21G ). Length 1.5× its width in lateral view; side of pronotum mainly rugose, but dorsally nearly smooth; mesoscutum densely rugose and rather shiny, densely setose; notauli hardly indicated; scutellar sulcus wide ( Fig. 21G ); scutellum triangular, flat, distinctly granulate-rugose and rather shiny; metanotum without median carina or tooth; propodeum coarsely reticulate-rugose, without latero-posterior tubercles, no transverse or median carinae.

WINGS. Fore wing 3.2 × as long as its maximum width; length of 1-R1 1.8× as long as pterostigma; r of fore wing 0.8× 3-SR; distance between 1-R1 and wing apex 0.4× 1-R1; 2-SR bent ( Fig. 21F ); SR1 nearly straight; 2-SR+M present; pterostigma large, parastigma small; 1-CU1 0.6× as long as vein 2-CU1, cu-a oblique and 0.6 × as long as 1-CU1; r: 3-SR: SR1= 18:22: 119; 2-SR: 3-SR: r-m= 49:22: 16; 2-M straight posteriorly, bent anteriorly ( Fig. 21F ).

LEGS ( Fig. 21J ). Hind femur slender and with satin sheen, 5.0 × as long as wide, hind tibia slender; middle tibia with large pale-yellow blister; hind coxa smooth and shiny.

METASOMA ( Fig. 21G–H ). Carapace elliptical in dorsal view, 1.9× as long as wide and 1.2 × as long as mesosoma; first and second tergites coarsely and densely longitudinally rugose; second suture narrow; third tergite 1.1× as long as second tergite and laterally weakly curved, in lateral view slightly convex posteriorly, in dorsal view convex medially, densely and semi-circularly rugose and rounded ( Fig. 21H ), lateral lamella wide, medio-apically deeply emarginate; ovipositor sheath narrow ( Fig. 21G ), with some long and erect setae; hypopygium apically acute and with up-curved short and robust triangular protuberance ( Fig. 21G ).

Male

Unknown.

Host

Unknown.

Distribution

China (Sichuan).

Figures

Fig. 21. Phanerotoma nigricornis sp. nov., holotype, ♀ (ZJUH No. 200800263). A. Habitus, lateral view. B. Head, dorsal view. C. Head, lateral view. D. Head, anterior view. E. Antenna, lateral view. F. Fore wing. G. Mesosoma, dorsal view. H. First third of metasomal tergites, dorsal view. I. Metasoma, lateral view. J. Hind leg. K. Mandible, ventral view. Scale bars: A–D, F–I =1 mm; K =0.2 mm (no scale bars for E, J).