Psyllaephagus guangxiensis Zu, 2021

Wu, Fei, Zhen, Wenquan, Yang, Zening & Zu, Guohao, 2021, A new species of Psyllaephagus (Hymenoptera: Encyrtidae) from China, parasitoid of Macrohomotoma sinica (Hemiptera: Homotomidae) on Ficus concinna, Biodiversity Data Journal 9, pp. 63253-63253 : 63253

Psyllaephagus guangxiensis Zu sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Zu Guo-Hao; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Psyllaephagus guangxiensis; Location: country: China; stateProvince: Guangxi; locality: Guilin City, Xiangshan District, Wanshou Lane ; verbatimElevation: 150 m; locationRemarks: label transliteration: "Guangxi, Guilin, Wanshou Lane, 02.08.2018, Zu Guohao, Chen Ye, reared from M. sinica (Hemiptera: Homotomidae) on F. concinna"; Event: samplingProtocol: reared; eventDate: 29-08-2018; Record Level: collectionCode: Insects; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: recordedBy: Zu Guo-Hao; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Psyllaephagus guangxiensis; Location: country: China; stateProvince: Guangxi; locality: Guilin City, Xiangshan District, Wanshou Lane ; verbatimElevation: 150 m; locationRemarks: label transliteration: "Guangxi, Guilin, Wanshou lane, 02.08.2018, Zu Guohao, Chen Ye, reared from M. sinica (Hemiptera: Homotomidae) on F. concinna"; Event: samplingProtocol: reared; eventDate: 29-08-2018; Record Level: collectionCode: Insects; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: recordedBy: Zu Guo-Hao; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Psyllaephagus guangxiensis; Location: country: China; stateProvince: Guangxi; locality: Guilin City, Xiangshan District, Wanshou Lane ; verbatimElevation: 150 m; locationRemarks: label transliteration: "Guangxi, Guilin, Wanshou lane, 02.08.2018, Zu Guohao, Chen Ye, reared from M. sinica (Hemiptera: Homotomidae) on F. concinna"; Event: samplingProtocol: reared; eventDate: 29-08-2018; Record Level: collectionCode: Insects; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: recordedBy: Zu Guo-Hao; individualCount: 5; sex: male; lifeStage: adult; Taxon: scientificName: Psyllaephagus guangxiensis; Location: country: China; stateProvince: Guangxi; locality: Guilin City, Xiangshan District, Xicheng Road ; verbatimElevation: 150 m; locationRemarks: label transliteration: "Guangxi, Guilin, Xicheng road, 14.07.2020, Zheng Li, reared from M. sinica (Hemiptera: Homotomidae) on F. concinna"; Event: samplingProtocol: reared; eventDate: 14-07-2020; Record Level: collectionCode: Insects; basisOfRecord: PreservedSpecimen

Description

Female. Holotype. Length, 2.02 mm (excluding ovipositor). Body generally with metallic lustre; head, mesoscutum, scutellum and axilla with bright green metallic reflection; clypeus and metasoma with copper green reflection. Antenna black brown, except scape with apical 1/9 yellowish-white, F1, F2 and F3 (partly) ventrally yellow; mandibles brown, pulpi and palpi yellowish-white; tegulae white; legs pale yellow, except hind coxa wih a large brown spot dorsally; wings hyaline; ovipositor apically paler.

Frontovertex (Fig. 1 A) 0.28 × head width, with distinct piliferous punctures of a thimble-like appearance, sculpture reticulate, more longitudinally elongate on lower parts of face and on genae; ocelli forming an angle of 73°; posterior ocellus closer to eye margin than to occipital margin; antennal torulus with its dorsal margin well above lower margin of eyes. Antennal scape (Fig. 1 B) broadened, about 2.65 × as long as broad; pedicel 2.1 × as long as broad, 1.53 × as long as F1; F1 1.67 ×, F2 1.80 ×, F3 1.80 ×, F4 1.47 ×, F5 1.26 ×, F6 1.09 × as long as broad, respectively; clava shorter than preceding three funicle segments combined; funicle with linear sensillae on all funicular segments. Mandible with one tooth and a broad truncation. Measurements (μm): head height, 470; head width, 580; frontovertex width, 160; OD, 33; POL, 103; OOL, 5; OCL, 44; AOL, 48; eye height, 370; malar space, 130; length (and width): radicle, 81; scape, 265 (100); pedicel, 84 (40); F1, 55 (33); F2, 63 (35); F3, 63 (35); F4, 63 (43); F5, 63 (50); F6, 63 (58); clava, 148 (58).

Mesosoma (Fig. 1 C). Mesoscutum and scutellum with fine reticulate sculpture; scutellum 1.07 × as long as wide and 0.88 × as long as mesoscutum. Fore wing (Fig. 1 D) 2.28 × as long as wide; linea calva closed by one line of setae posteriorly, uninterrupted; postmarginal vein about as long as stigma vein; hind wing (Fig. 1 E) 3.55 × as long as broad. Mid-tibial spur (Fig. 1 F) 0.25 × as long as mid-tibia and shorter than corresponding basitarsus. Measurements (μm): fore wing length, 1425; fore wing width, 625; submarginal vein, 590; marginal vein, 40; postmarginal vein, 103; stigmal vein, 108; hind wing length, 975; hind wing width, 275; MT, 560; mid-tibial spur, 140; mid-basitarsus, 190.

Metasoma longer (1.24 ×) than mesosoma and with hypopygium reaching to about two-thirds in specimens stored in 99% ethanol; ovipositor 2.14 × as long as mid-tibia, distinctly exserted; third valvula about 3.14 × as long as mid-tibial spur. Measurements (μm): OL, 1200. [MT, 560]

Male. Length 0.95-1.38 mm. Generally very similar to female in appearance except for colouration of frontovertex, mesoscutum and scutellum with copper green reflection, relatively less dense setae in basal cell of fore wing and structure of antennae and genitalia. Head, in frontal view (Fig. 2 A), (1.23 ×) wider than high; frontovertex 0.53 × head width, with distinct piliferous punctures of a thimble-like appearance, sculpture polygonal; ocelli forming an angle of 130°; antennal torulus with its dorsal margin well above lower margin of eyes. Antennal scape (Fig. 2 B) broadened, about 2.5 × as long as broad; all funicle segments subquadrate or slightly longer than wide. Fore wing (Fig. 2 D) about 2.17 × as long as wide; hind wing (Fig. 2 E) 3.30 × as long as wide. Mid-tibial spur (Fig. 2 F) 0.22 × as long as mid-tibia and shorter than corresponding basitarsus. Metasoma (Fig. 2 C) shorter than mesosoma; aedeagus about 1.52 × as long as mid-tibia.

Variation. Very little morphological variation has been found in material included in the type series.

Diagnosis

Female. Length, 2.02-2.50 mm. Body stout, dark brown, head, mesoscutum, scutellum and axilla with bright green metallic reflection; tegulae white; legs pale yellow, except hind coxa partly brown; frontovertex slightly more than a quarter of head width, with distinct piliferous punctures of a thimble-like appearance; ocelli forming an acute triangle; scape broadened, about 2.7 × as long as broad; F1 shorter than pedicel; fore wing hyaline, about 2.3 × as long as wide; ovipositor distinctly exserted, 2.14 × as long as mid-tibia.

Male (Length 0.95-1.38 mm). Frontovertex, mesoscutum and scutellum with copper green reflection; frontovertex 0.53 × head width; scape about 2.5 × as long as broad; fore wing about 2.2 × as long as broad; aedeagus about 1.5 × as long as mid-tibia.

Etymology

The specific name refers to the collecting location of the type series. Noun in apposition.

Distribution

China (Guangxi).

Biology

Parasitoid of M. sinica Yang & Li ( Hemiptera : Homotomidae ) feeding on F. concinna (Miq.) Miq. ( Urticales : Moraceae ).

Taxon discussion

According to the keys in Tang et al. (2016) (China), Singh (1996) (India), Trjapitzin (1981) (Palaearctic), Prinsloo (1981) (Southern Africa) and Riek (1962) (Australia), P. guangxiensis is similar to P. macrohomotoma Singh and Agarwal and P. bruchus Riek, which all have a long ovipositor, but P. guangxiensis can be distinguished by the broader scape, about 2.7 × as long as broad (about 4 × in Psyllaephagus bruchus ), shorter F1, 0.65 × as long as pedicel (longer than pedicel in Psyllaephagus macrohomotoma when compared to figure 20C of Singh and Agarwal (1993), broader fore wing, 2.28 × as long as wide (2.46 × in Psyllaephagus macrohomotoma ) and narrow hind wing, 3.55 × as long as broad (3.16 × in Psyllaephagus macrohomotoma ). The new species is also morphologically similar to P. elaeagni Trjapitzin and P. caillardiae Sugonjaev. However, it differs from P. elaeagni as follows: ovipositor distinctly exserted (not exserted in Psyllaephagus elaeagni ), scape 2.7 × (5.6 × in Psyllaephagus elaeagni ), mid-coxa yellow (dark brown in Psyllaephagus elaeagni ), tegula completely white (dark brown apically in Psyllaephagus elaeagni ); from P. caillardiae : scape 2.7 × as long as broad (3.8 × in Psyllaephagus caillardiae ), postmarginal vein about equal to stigmal vein (distinctly shorter than stigmal vein in Psyllaephagus caillardiae ).

Figures

Figure 1. Psyllaephagus guangxiensis sp. nov. (female, Holotype): A. head; B. antenna; C. mesosoma and metasoma; D. fore wing; E. hind wing; F. legs. Scale bars = 100 μm.

Figure 2. Psyllaephagus guangxiensis sp. nov. (male): A. head; B. antenna; C. mesosoma and metasoma; D. fore wing; E. hind wing; F. legs. Scale bars = 100 μm.