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

Phanerotoma fuscisternalis sp. nov.

urn:lsid:zoobank.org:act:928E58E8-E786-4BA4-A746-BA9F513E3474

Fig. 13 View Fig

Diagnosis

Third tergite of metasoma truncate posteriorly ( Fig. 13I View Fig ); clypeus with three small teeth ventrally ( Fig. 13E View Fig ); hypopygium acute apically, with medium-sized and slender triangular protuberance ( Fig. 13J View Fig ); apical half of hind femur dark brown ( Fig. 13F View Fig ); pterostigma dark brown ( Fig. 13G View Fig ); lower tooth of mandible 0.2× as long as apical tooth ( Fig. 13L View Fig ).

Differential diagnosis

If carapace distinctly convex apically and apical half of hind tarsus infuscate, see West Palaearctic P. dentata ( Panzer, 1805) .

Etymology

Named after the dark brown mesosoma, from the Latin ‘ fuscus ’ for ‘dusky, dark’ and ‘ sternum ’ for ‘breastbone’.

Type material

Holotype CHINA – Jilin • ♀; Changchun ; 23 Jul. 1982; Juxian Lou leg.; ZJUH No. 950973 .

Paratypes (11 ♀♀, 5 ♂♂)

CHINA – Jilin • 5 ♂♂; same data as for holotype; ZJUH Nos 950965 , 950968 , 950969 , 950972 , 950974 • 4 ♀♀; same data as for preceding; ZJUH Nos 950967 , 950966 , 950970 , 950971 . – Zhejiang • 1 ♀; Longquan; Fengyang Mt. ; 30 Jul. 2007; Jingxian Liu leg.; ZJUH No. 200801447 . – Shaanxi • 1 ♀; Fengxian ; 34°15′N 106°58′E; elev. 1501 m; 21-22 Aug. 2013; Bingbing Tu leg.; ZJUH No. 201300366LT . GoogleMaps – Taiwan • 1 ♀; Baxian Mt. ; 4 Apr. 2011; Pu Tang leg.; ZJUH No. 202300115 . – Henan • 1 ♀; Jigong Mt. ; 10 Jul. 1997; Xuexin Chen leg.; ZJUH No. 973593 • 1 ♀; Baotianman ; 13-15 Jul. 1998; Xuexin Chen leg.; ZJUH No. 991769 . – Hebei • 1 ♀; Handan ; 17 Aug. 1977; Zhongshi Ma leg.; ZJUH No. 780151 . – Heilongjiang • 1 ♀; Jingbo River ; 26 Aug. 1995; Juxian Lou leg.; ZJUH No. 962184 .

Description

Female

MEASUREMENTS. Length of body 4.3 mm, of fore wing 3.6 mm.

COLOURATION. Yellow; stemmaticum, parastigma, pterostigma, mesonotum except medially, side of scutellum, propodeum laterally, second tergite laterally, third tergite largely and hind femur apically dark brown, hind tibia with dark brown patch; temple posteriorly in dorsal view, teeth of mandible and scutellum brown.

HEAD. Width 1.4 × median length in anterior view ( Fig. 13E View Fig ) and part of head above eye in lateral view 0.3× height of eye ( Fig. 13D View Fig ); antenna with 23 segments, six subapical segments moniliform, and antenna gradually narrowed and slender ( Fig. 13F View Fig ); area of stemmaticum mainly granulate; OOL: diameter of posterior ocellus: POL=32: 12:9; eye 1.4 × as long as temple in dorsal view ( Fig. 13C View Fig ); 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 diagonally rugose laterally and transversely rugose medially, without median carina; clypeus smooth and shiny, about as wide as minimum width of face, intertentorial distance 2.4× minimum width between clypeus and eye, clypeus long erect setose and with 3 small teeth medio-ventrally ( Fig. 13E View Fig ); eye medium-sized, in lateral view 1.5× as wide as temple ( Fig. 13D View Fig ), in anterior view its height 0.7× minimum width of face; upper condyle of mandible close to lower level of eyes ( Fig. 13E View Fig ); malar space as long as basal width of mandible; lower tooth of mandible 0.2× length of apical tooth, short and minute ( Fig. 13L View Fig ).

MESOSOMA ( Fig. 13H View Fig ). Length 1.4× 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. 13H View Fig ); scutellum triangular, flat, longitudinally rugose and rather shiny; metanotum with short median carina anteriorly and small tooth protruding posteriorly; propodeum coarsely reticulate-rugose, latero-posteriorly tuberculate, no transverse or median carinae.

WINGS. Fore wing 2.7× as long as its maximum width; length of 1-R1 1.8× as long as pterostigma; r of fore wing 0.5× as long as 3-SR; distance between 1-R1 and wing apex 0.5× 1-R1; 2-SR distinctly bent ( Fig. 13G View Fig ); SR1 nearly straight; 2-SR+M present; pterostigma large, parastigma large; 1-CU1 0.3× as long as vein 2-CU1, cu-a oblique and 1.2 × as long as 1-CU1; r: 3-SR: SR1 =7: 15: 43; 2-SR: 3-SR: r-m=5:3: 2; 2-M bent ( Fig. 13G View Fig ).

LEGS ( Fig. 13K View Fig ). Hind femur with satin sheen, 3.5× as long as wide and widened submedially; hind tibia swollen ( Fig. 13K View Fig ) and with dark brown patch; middle tibia with large yellow blister; hind coxa smooth and shiny.

METASOMA ( Fig. 13I–J View Fig ). Carapace elliptical in dorsal view, 1.7× as long as wide and 1.2× as long as mesosoma; first and second tergites coarsely and densely longitudinally rugose; second suture wide; third tergite 1.9× as long as second tergite and laterally weakly curved, in dorsal view densely rugose and truncate ( Fig. 13I View Fig ), lateral lamella wide, apically deeply emarginate; ovipositor sheath narrow ( Fig. 13J View Fig ), with some long and erect setae; hypopygium apically acute, with up-curved medium-sized and slender triangular protuberance ( Fig. 13J View Fig ).

VARIATION. Length of fore wing of female 4.2–5.5 mm; vein cu-a 1.0–1.2× as long as vein 1-CU1; lower tooth of mandible 0.2–0.4 × as long as length of apical tooth; apical half of hind femur brownish or dark brown.

Male

Very similar to female, but six subapical antennal segments cylindrical and longer ( Fig. 13B View Fig ); eye large, in dorsal view 1.7× as long as temple.

Host

Unknown.

Distribution

China ( Taiwan, Zhejiang, Shaanxi, Jilin, Henan, Hebei, Heilongjiang).