Phanerotomella nigrisoma sp. nov.

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Figs 49–50

Diagnosis

Body small, length about 2.7 mm (Fig. 49); mesopleuron densely and finely reticulate and with distinctly smooth and shiny area posteriorly (Fig. 50I); hind tibia dark brown but basally white and contrasting with yellowish brown hind femur (Fig. 50F); hind coxa ivory (Fig. 50F); face and temple rugulose (Fig. 50B–C).

Etymology

Named after its black mesosoma; ‘ niger ’ is Latin for ‘black’ and ‘soma’ is Greek for ‘body’.

Type material

Holotype CHINA – Yunnan • ♀; Bazhai, Yudong Reservoir; Jun. 2017; Z. Liu leg.; ZJUH No. 202307931.

Paratypes (3 ♀♀)

CHINA – Yunnan • 3 ♀♀; Puer, Laiyang River National Forest Park; 12 Sep. 2013; J. Zeng leg.; ZJUH Nos 202026436, 202026448, 202026498 .

Description

Female

MEASUREMENTS. Length of body 2.7 mm, fore wing 2.5 mm.

COLOURATION. Black; metasoma ventrally white or ivory; antenna dark brown except 3 rd –6 th segments white and scapus anteriorly yellow; mandible yellowish and with reddish teeth; fore and middle legs yellow except coxa and trochanter white; hind femur brownish yellow, hind tibia dark brown but basally whitish, hind coxa, trochanter and first to fourth tarsal segments white but telotarsus brown; wing veins dark brown to pale brown, pterostigma and parastigma dark brown.

HEAD (Fig. 50A–C). Width 1.3 × median length in anterior view (Fig. 50B) and part of head above eye in lateral view 0.3× height of eye (Fig. 50C); antenna with 26+ segments, widened and shortened medially, gradually narrowing apically, subapical segments non-moniliform and longer than wide, third, fourth, tenth and fifteenth segments 3.5, 3.3, 1.7 and 1.1 × as long as wide in lateral view, respectively (Fig. 50K); area of stemmaticum transversely striate; OOL: OD: POL=18: 5: 5; length of eye 1.0× temple in dorsal view (Fig. 50A); frons transversely rugulose and with median carina; vertex reticulate-rugulose with short setae; temple superficially rugulose; face rugulose and with distinct median ridge, dorsally connected to median carina; clypeus smooth, truncate medio-ventrally; eye width in lateral view as wide as maximum width of temple (Fig. 50C), eye height in anterior view 0.7 × minimum width of face (Fig. 50B); malar space rugulose and 1.1× as long as basal width of mandible; mandible somewhat slender, lower tooth of mandible 0.5× as long as apical tooth (Fig. 50D); face width equal to height of face and clypeus together.

MESOSOMA (Fig. 50H–I). Length 1.6× its width in lateral view (Fig. 50I); side of pronotum superficially rugulose-punctate; mesoscutum regularly and densely reticulate; notauli absent; scutellar sulcus with six crenulae (Fig. 50H); scutellum reticulate and matt; mesopleuron regularly and densely reticulate 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 tubercles laterally.

WINGS (Fig. 50G). Fore wing 2.6× as long as its maximum width; second submarginal cell weakly petiolate or sessile; vein m-cu distinctly postfurcal; veins r and SR1 straight; vein 1-SR+M curved; length of 1-R1 as long as pterostigma; vein r issued far beyond middle of pterostigma, 1.1× vein r-m; r: 2-SR: SR1=13: 30: 69; vein 1-CU1 0.3× as long as vein 2-CU1. Hind wing: M+CU: 1-M: 1r-m =23: 29: 12.

LEGS (Fig. 50F). Hind femur 3.6× as long as wide; longest spur of hind tibia 0.5× as long as its basitarsus; hind leg smooth and shiny except fine and superficial punctation; middle tibia without ivory blister.

METASOMA (Fig. 50E, J). Oval in dorsal view (Fig. 50J), carapace 1.8 × as long as wide and 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 small and blunt tubercles latero-apically (Fig. 50E).

VARIATION. Second submarginal cell weakly petiolate or sessile; length of fore wing of female 2.5– 2.8 mm.

Male

Unknown.

Host

Unknown.

Distribution

China (Yunnan).

Remarks

Phanerotomella nigrisoma sp. nov. is similar to P. taiwanensis because it has the antenna with a white basal band of the flagellum, the eye in dorsal view 0.9-1.0 × as long as the temple, and the antenna with non-moniliform subapical segments. However, P. nigrisoma can be distinguished from P. taiwanensis by having the antenna widened medially (slender in the latter), the body length about 3.0 mm (4.0 mm in the latter), the face and temple rugulose and matt (punctate and shiny in the latter), the mesopleuron reticulate and with a smooth, shiny area posteriorly (punctate and without a smooth area in the latter), the hind femur yellowish brown and the hind tibia dark brown (black in the latter).