Coccobius bimaculatus Wang, Huang & Polaszek

Wang, Zhu-Hong, Huang, Jian & Polaszek, Andrew, 2014, Three new species of Coccobius Ratzeburg (Hymenoptera, Aphelinidae) and redescription of C. abdominis Huang and C. furviflagellatus Huang from China, Zootaxa 3774 (5), pp. 460-472 : 463-464

Coccobius bimaculatus Wang, Huang & Polaszek , sp. nov.

( Figs 10–18 )

Type material. Holotype female. China: Fujian, Fuzhou, Jinshan, 30 September 2013 (coll. Zhu-Hong Wang), ex. diaspidid scale ( Hemiptera : Diaspididae ) on bamboo. Deposited as a slide-mounted specimen in College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China ( FAFU).

Female. Body length 0.54 mm.

Colour. Head mostly dark to blackish brown, except frontovertex yellow; eyes and ocelli brownish red, two small dark brown spots anterior to the medial ocellus ( Fig. 10 ); pronotum dark brown; mid-lobe of mesoscutum dark yellow with a large dark brown patch on each side and a longitudinal dark brown stripe medially; side-lobe of mesoscutum dark yellow basally and dark brown apically; axilla dark brown; mesoscutellum dark yellow with a dark brown patch around each scutellar sensillum; metanotum dark yellow medially and dark brown laterally; propodeum dark yellow basally and brown to dark brown apically; sterna of mesosoma mostly dark brown; metasomal tergites mostly pale yellow, except T1 and T2 mostly brown; sterna of metasoma pale yellow, ovipositor and third valvula pale yellow. Antenna with radicle, basal portion of scape, and pedicel mostly dark brown; flagellum pale yellow, apex of C2 slightly darkened, longitudinal sensilla on flagellum dark brown. Wings hyaline. Legs with fore coxae mostly pale brown to dark brown, fore femora mostly pale brown to dark brown except basally and apically pale yellow; mid and hind legs mostly pale yellow, except mid and hind coxae pale brown.

Head. Vertex with reticulate sculpture; eyes finely setose. Antennal scape about 3.50× as long as wide; pedicel 1.48× as long as wide, 1.12× as long as F1; F1 subequal in length to F2, 0.87× as long as F3, F1–F3 1.32×, 1.38× and 1.36× as long as wide respectively, each with 2 longitudinal sensilla; clava slightly longer than funicle, C1 1.85× as long as wide, C2 2.52× as long as wide, 1.24× longer than C1, and each claval segment with 3 or 4 longitudinal sensilla.

Mesosoma. Mid-lobe of mesoscutum with irregularly hexagonal cells or reticulation, with 27 setae; distance between axillae about 2.63× length of an axilla; mesoscutellum 0.84× as long as mid-lobe of mesoscutum, with irregular longitudinal reticulation and with 2 pairs of setae, placoid sensilla on mesoscutellum located between the two pairs of setae, but slightly closer to fore pair; mesopostphragma, measured from apex of mesoscutellum, 1.11× as long as mesoscutellum. Fore wing relatively small, 2.48× as long as maximum width of wing disc, marginal fringe 0.24× as long as maximum width of disc; submarginal vein shorter than marginal vein, with 5 setae; marginal vein with 7 setae along anterior margin; postmarginal vein present, 0.27× as long as stigmal vein; wing disc densely setose with narrow asetose area posterobasally.

Metasoma. Metasoma about 1.09× as long as mesosoma; tergites 1–7 with setae as follows: T1–T2, 2+2 each; T3, 2+3; T4, 2+2; T5, 2+4; T6, 4 between cercal plates; T7, 9 in one row; ovipositor basally located at T3, slightly projecting beyond apex of metasoma, 1.41× as long as mid tibia, third valvula about 2.00× as long as mid basitarsus.

Male. Unknown.

Host. An unidentified Diaspididae (Hemiptera) scale on bamboo.

Distribution. China (Fujian).

Etymology. The species name is derived from the Latin, bi = double, maculatus = patched, referring to the two dark brown patches on the mesoscutellum.

Diagnosis. Coccobius bimaculatus resembles C. chaoi Huang 1994 , which keys to couplet 12 in the key to Chinese species given by Wang et al. (2014), but can be distinguished from the latter by the following: head with frontovertex yellow except for two small dark brown spots before the medial ocellus; mid-lobe of mesoscutum dark yellow with a large dark brown patch on each side and a longitudinal dark brown stripe in middle, and with 27 setae; and mesoscutellum dark yellow with a dark brown patch around each scutellar sensillum. Females of C. chaoi have the head dark brown, both the mid-lobe of the mesoscutum and the mesoscutellum dark brown, and the mid-lobe of mesoscutum has 38 setae.

Figures

FIGURES 10 – 18. Coccobius bimaculatus, female: 10, body in dorsal view; 11, body in ventral view; 12, head in frontal view; 13, head in occipital view; 14, antenna; 15, fore wing; 16, mesosoma; 17, fore wing venation; 18, ovipositor.