Phanerotomella annulata sp. nov.

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Figs 3–4

Diagnosis

Antenna with white band on 10 th –12 th segments (Fig. 4K); mandible basal half blackish and apical half yellowish and with reddish teeth (Fig. 4D); hind femur slender, 5.6× as long as wide (Fig. 4F); body length about 5.3 mm (Fig. 3); body black (Fig. 3); hind femur black and hind tibia black except basally white (Fig. 4F).

Etymology

Named after white antennal band; ‘ annulatus ’ is Latin for ‘ringed’.

Type material

Holotype CHINA – Xizang • ♀; Linzhi, Yigong Tea Farm; 3 Aug. 2019; Zekai Li leg.; ZJUH No. 202307798.

Description

Female

MEASUREMENTS. Length of body 5.0 mm, fore wing 4.9 mm.

COLOURATION. Black; metasoma ventrally white or ivory; antenna black except for white band of 10 th – 12 th segments; mandible basal half blackish and apical half yellowish and with reddish teeth; fore and middle legs black except coxa, trochanter and tibia basally white; hind leg black except basal third of coxa, trochanter, tibia basally and first to third tarsal segments white; wing veins blackish brown, pterostigma and parastigma black.

HEAD (Fig. 4A–C). Width 1.4× median length in anterior view (Fig. 4B) and part of head above eye in lateral view 0.4× height of eye (Fig. 4C); antenna with 52 segments and 1.6× as long as fore wing, not widened but shortened medially, gradually narrowing apically, subapical segments non-moniliform and slightly longer than wide, third, fourth, tenth, fifteenth and penultimate segments 4.0, 3.8, 1.9, 1.2 and 1.8 × as long as wide in lateral view, respectively (Fig. 4K–L); area of stemmaticum transversely striate; OOL: OD: POL=3: 1: 1; length of eye 0.9 × temple in dorsal view (Fig. 4A); frons transversely rugulose and with median carina; vertex reticulate-rugose with short setae; temple densely 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 0.7× maximum width of temple (Fig. 4C), eye height in anterior view 0.6 × minimum width of face (Fig. 4B); malar space rugulose and 1.2× as long as basal width of mandible; mandible rather robust, lower tooth of mandible 0.8 × as long as apical tooth (Fig. 4D); face width 0.9× height of face and clypeus together.

MESOSOMA (Fig. 4H–I). Length 1.4× its width in lateral view (Fig. 4I); side of pronotum superficially punctate; mesoscutum regularly and densely reticulate; notauli absent; scutellar sulcus with six short crenulae (Fig. 4H); scutellum punctate; mesopleuron distinctly punctate and with smooth and shiny area posteriorly, with distinct and complete precoxal sulcus; propodeum reticulate, without median carina, with irregular transverse carina connected to four distinct and blunt lateral tubercles.

WINGS (Fig. 4G). Fore wing 3.0× as long as its maximum width; second submarginal cell sessile; vein m-cu distinctly postfurcal; vein r and vein SR1 straight; vein 1-SR+M concave; length of 1-R1 1.2× pterostigma; vein r issued far beyond middle of pterostigma, 1.0× vein r-m; r: 2-SR: SR1 =12: 31: 52; vein 1-CU1 0.2× as long as vein 2-CU1. Hind wing: M+CU:1-M:1r-m =20: 31:9.

LEGS (Fig. 4F). Hind femur 5.6× as long as wide; longest spur of hind tibia 0.4 × its basitarsus; hind leg smooth and shiny except fine and superficial punctation; hind tibia slender; middle tibia without ivory blister.

METASOMA (Fig. 4E, J). Oval in dorsal view (Fig. 4J), carapace 1.8 × as long as wide and as long as mesosoma; first to third tergites densely reticulate-rugose; third tergite 0.8× 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 medium-sized and blunt tubercles latero-apically (Fig. 4E).

Male

Unknown.

Host

Unknown.

Distribution

China (Xizang).

Remarks

Phanerotomella annulata sp. nov. is similar to P. taiwanensis in having a similar colouration of the body and hind femur. However, Phanerotomella annulata can be easily distinguished from P. taiwanensis by having an antenna with a white band on the 10 th –12 th segments (antenna with white band on 3 rd- 4 th segments in the latter), the hind femur 5.6× as long as wide (4.7 × in the latter), the more robust mandible and an inner tooth 0.7 × as long as apical tooth (slender and 0.5 × in the latter), and the mandible basal half black and apical half yellow (mandible yellow in the latter).