Phanerotomella distenticornis, He & Achterberg & He & Tang & Chen, 2025

He, Jia-Yue, Achterberg, Cornelis Van, He, Jun-Hua, Tang, Pu & Chen, Xue-Xin, 2025, The genus Phanerotomella Szépligeti (Insecta, Hymenoptera, Braconidae, Cheloninae) from China, with descriptions of sixteen new species, European Journal of Taxonomy 1002, pp. 1-130 : 41-44

Phanerotomella distenticornis sp. nov.

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Figs 27–28

Diagnosis

Eye in dorsal view 0.8× as long as temple ( Fig. 28A ); mesopleuron rugulose and with distinct smooth and shiny area posteriorly ( Fig. 28I ); 21 th –28 th segments of antenna at most as long as wide ( Fig. 28K ); first metasomal tergite distinctly longitudinally striate medially ( Fig. 28J ).

Etymology

Named after the medially distinctly widened antenna; ‘ distentus ’ is Latin for ‘swollen’.

Type material

Holotype

CHINA – Yunnan • ♀; Deqin, Baima Snow Mt. ; 8 Jun. 2009; J.L. Tang leg.; ZJUH No. 202020057. Paratype

CHINA – Ningxia • 1 ♀; Liupan Mt. ; 3–14 Jul. 2009; D.W. Zheng leg.; ZJUH No. 202207749 .

Description

Female

MEASUREMENTS. Length of body 3.8 mm, fore wing 3.6 mm.

COLOURATION. Black; metasoma ventrally white or ivory; antenna dark brown; mandible yellowish and with reddish teeth; fore and middle legs brownish yellow except tibia basally whitish; hind leg brownish yellow except tibia apically and femur apical half dark brown; wing veins and parastigma pale brown, pterostigma dark brown.

HEAD ( Fig. 28A–C ). Width 1.4 × median length in anterior view ( Fig. 28B ) and part of head above eye in lateral view 0.4× height of eye ( Fig. 28C ); antenna with 33 segments and 1.1× as long as fore wing, distinctly widened and shortened medially, 21 st –28 th segments about as long as wide, gradually narrowing apically, about 13 subapical segments moniliform, third, fourth, tenth, fifteenth and penultimate segments 3.8, 3.4, 1.6, 1.1 and 1.3× as long as wide in lateral view, respectively ( Fig. 28K–L ); area of stemmaticum transversely striate; OOL: OD: POL=47: 12:18; eye 0.8 × as long as temple in dorsal view ( Fig. 28A ); frons transversely rugulose and with median carina; vertex reticulate-rugulose with short setae; temple punctate and shiny; face rugulose and with distinct median ridge, dorsally connected to median carina; clypeus finely punctate and with shiny interspaces, truncate medio-ventrally; eye width in lateral view 0.8× maximum width of temple ( Fig. 28C ), eye height in anterior view 0.6× minimum width of face ( Fig. 28B ); malar space punctate and 1.4 × as long as basal width of mandible; mandible slender, lower tooth of mandible 0.4× as long as apical tooth ( Fig. 28D ); face width equal to height of face and clypeus together.

MESOSOMA ( Fig. 28H–I ). Length 1.5× its width in lateral view ( Fig. 28I ); side of pronotum reticulate-rugulose; mesoscutum regularly and densely reticulate, medio-posteriorly depressed and coarser than anteriorly; notauli absent; scutellar sulcus with seven crenulae ( Fig. 28H ); scutellum punctate-rugulose; mesopleuron punctate-rugulose and with distinctly smooth and shiny area posteriorly, precoxal sulcus absent; propodeum reticulate, without median carina, with irregular transverse carina connected to four weak and blunt lateral tubercles.

WINGS ( Fig. 28G ). Fore wing 3.0× as long as its maximum width; second submarginal cell sessile and vein 3-SR developed; vein m-cu postfurcal; second submarginal cell distinctly narrowed anteriorly; veins r and 1-SR+M straight; vein SR1 curved; length of 1-R1 0.9× pterostigma; vein r issued far beyond middle of pterostigma, 0.6× vein r-m; r: 2-SR: SR1= 4: 13: 21; vein 1-CU1 0.3× as long as vein 2-CU1. Hind wing: M+CU:1-M:1r-m =35: 37:10.

LEGS ( Fig. 28F ). Hind femur 4.2× as long as wide; longest spur of hind tibia 0.4× as long as its basitarsus; hind leg smooth and shiny except fine and superficial punctation; middle tibia without ivory blister.

METASOMA ( Fig. 28E, J ). Elliptical in dorsal view, carapace 1.7× as long as wide and 1.1× as long as mesosoma; first to third tergites densely reticulate-rugose; third tergite 0.9× as long as second tergite, medial length of third tergite 0.5× its maximum width; lamella of third tergite not protruding medio-apically and with pair of blunt tubercles latero-apically.

VARIATION. Second submarginal cell sessile or vein 3-SR weakly developed; length of fore wing of female 3.4–3.6 mm; around eye, temple and clypeus more or less reddish brown; metasomal carapace 1.7–1.9× as long as wide.

Male

Unknown

Host

Unknown

Distribution

China (Ningxia, Yunnan).

Remarks

Phanerotomella distenticornis sp. nov. is similar to P. nigricaner Chen & Ji, 2003 because of the black body, the medially widened antenna and the sessile second submarginal cell. However, P. distenticornis can be distinguished from P. nigricaner by having the eye in dorsal view 0.8 × as long as the temple (1.2–1.3× in the latter), the mesopleuron with a distinct smooth and a shiny area posteriorly (absent in the latter), 21 st –28 th segments of the antenna at most as long as wide (longer than wide in the latter), and the first metasomal tergite distinctly longitudinally striate medially (finely honeycomb-like sculptured in the latter).

Figures

Fig. 27. Phanerotomella distenticornis sp. nov., holotype, ♀ (ZJUH No. 202207749), habitus, lateral view. Scale bar: 1.0 mm.

Fig. 28. Phanerotomella distenticornis sp. nov., holotype, ♀ (ZJUH No. 202207749). A. Head, dorsal view. B. Head, anterior view. C. Head, lateral view. D. Mandible, ventral view. E. Lamella, posterior view. F. Hind leg. G. Fore and hind wing. H. Mesosoma, dorsal view. I. Mesosoma, lateral view. J. Metasoma, dorsal view. K. Antenna, lateral view. L. Apical antenna, lateral view. Scale bars: 0.1 mm.