Apanteles radocoxa Liu & Chen, 2020

Liu, Zhen, He, Jun-Hua, Chen, Xue-Xin & Gupta, Ankita, 2020, The ater-group of the genus Apanteles Foerster (Hymenoptera, Braconidae, Microgastrinae) from China with the descriptions of forty-eight new species, Zootaxa 4807 (1), pp. 1-205 : 143-145

Apanteles radocoxa Liu & Chen , sp. nov.

( Figures 70 , 102 )

Description. Holotype. Female. Body length 2.7 mm, fore wing length 3.2 mm.

Head. Transverse in dorsal view, nearly 2.2× as wide as long, 0.9× as wide as mesoscutum. Vertex between eye and posterior ocellus shiny with extremely shallow punctures. Temple slightly shiny with shallow punctures, strongly constricted. Face 0.6× as high as wide, shiny with sparse, shallow punctures, sparsely pubescent, inner margin of eyes parallel-sided. Ocelli not large, posterior tangent to anterior ocellus just touching posterior ocelli, distance between fore and hind ocellus nearly as long as diameter of hind ocellus, POL:OD:OOL=5.5:2.0:5.0. Antenna slightly shorter than body length, weakly closely articulated, penultimate flagellomere 1.3× longer than wide.

Mesosoma. Length:width:height = 55.0:36.0:37.5. Disc of mesonotum shiny, finely and sparsely punctate, interspaces larger than diameter of puncture, without any rugosity and longitudinal striations at posterior end of notaulic courses. Scutellar sulcus straight, narrow with carinae inside. Scutellum highly shiny and polished, except superficial, small punctures laterally, indistinctly longer medially than wide basally. Lateral polished field of scutellum reaching half length of scutellum. Propodeum dull, short, strongly rugose entirely, areola poorly defined due to dense rugosity, costulae absent, spiracle enclosed by keels. Mesopleuron shiny, anterior parts finely punctate.

Legs. Hind femur relatively thick, 3.0× longer than wide. Hind coxa shiny, with four to five lines of confluent punctures on top of the outside. Spines on outer side of third tibia numerous and close-set. Inner spurs of hind tibia half length of hind basitarsus, outer spur 1/3. Basitarsus of hind leg slightly longer than tarsomeres 2–4 combined (20.0:18.0), claws of normal size.

Wings. Pterostigma 2.8× as long as its widest part. Vein 1-R1 nearly 1.1× as long as pterostigma, nearly 2.9× as long as its distance from apex of marginal cell. Vein r arising from middle of pterostigma, nearly perpendicular to the latter, indistinctly longer than width of pterostigma, as long as 2-SR, indistinctly angled at junction, 2-M 3/5 length of 2-SR, as long as 1-SR, m-cu slightly longer than 2-SR+M, the latter as long as 1-SR and 2-M. First discal cell of fore wing much narrower, nearly 1.2× wider than high. Second submarginal cell of hind wing quadrate. Vein cu-a straight. Hind wing much wider, length of 1-M distinctly shorter than distance between its distal extremity and apex of vannal lobe, and vannal lobe beyond its widest part nearly straight and hairless.

Metasoma. 0.9× as long as mesosoma. T1 parallel-sided at apical half, abruptly converged from middle towards apex, short, 1.6× longer than hind width, concave at basal half, turned-over part slightly shiny, finely rugulosepunctate, without longitudinal channel, and apical tubercle polished. T2 shiny, polished, transverse, 4.4× wider than long in the middle, nearly straight apically. T3 1.8× longer than T2. Tergites posterior to T2 polished, shiny, and pubescent. Hypopygium distinctly longer than apex of metasoma. Ovipositor sheath one-and-a-quarter times longer than length of hind tibia, narrow, hairs long and relatively dense.

Colour. Black. Tegula dark brown. Palpi (blackish basally) and spurs pale yellowish. Antenna and ovipositor sheath dark brown. Labrum and mandible reddish brown. All coxae black, other parts of legs mostly dingy yellow, except hind femur brown, mid femur and hind tibia light brown. Wing membrane hyaline, C+SC+R, 1-R1 and bor- der of pterostigma yellowish brown, other alar veins more or less light brownish, pterostigma pallid.

Male. Unknown.

Material examined. Holotype: 1♀, Guilin , Guangxi, 1987.IX.22, He Junhua, No. 878701.

Distribution. China (Guangxi).

Etymology. The specific name “ radocoxa ” derives from the Latin “rado” and “coxa”, referring to hind coxa with four to five lines of confluent punctures dorsally.

Remarks. This species is similar to A. expansus Liu & Chen , sp. nov., but differs in the following: head more transverse in dorsal view, nearly 2.2× as wide as long, 0.9× as wide as mesoscutum (2.0× as wide as long, 1.2× as wide as mesoscutum in latter); face less transverse, nearly 0.9× as high as wide (rather transverse, 0.6× as high as wide in latter); and ovipositor sheath one-and-a-quarter times longer than length of hind tibia (0.7× longer in latter).

Figures

FIGURE 70. Apanteles radocoxa Liu & Chen, sp. nov. Holotype. a. habitus, lateral view; b. fore wing; c. head, dorsal view; d. propodeum; e. metasoma, dorsal view; f. hind wing; g. mesonotum and scutellum, dorsal view; h. mesopleuron; i. hind coxa; j. head, frontal view. Scale line = 0.5 mm.

FIGURE 102. 60–76: Distribution map of ater-group of the genus Apanteles Foerster, 1862. 60: A. nixoni Song & Chen, 2002; 61: A. ocellisublimus Liu & Chen, sp. nov.; 62: A. opacus (Ashmead, 1905); 63: A. oritias Nixon, 1965; 64: A. pachycarinatus Song & Chen, 2002; 65: A. pellucipterus Song & Chen, 2001; 66: A. plureseta Liu & Chen, sp. nov.; 67: A. prominens Liu & Chen, sp. nov.; 68: A. psenes Nixon, 1965; 69: A. qudra Liu & Chen, sp. nov.; 70: A. radocoxa Liu & Chen, sp. nov.; 71: A. raviantenna Chen & Song, 2004; 72: A. salsala Liu & Chen, sp. nov.; 73: A. salutifer Wilkinson, 1931; 74: A. saravus Nixon, 1965; 75: A. sartamus Nixon, 1965; 76: A. scrobiculatus Liu & Chen, sp. nov.