Ooencyrtus alrake Hayat

Hayat, Mohammad, 2012, On some Encyrtidae (Hymenoptera: Chalcidoidea) associated with gall-inducing psylloids, Phacopteron and Trioza species (Hemiptera: Phacopteronidae, Triozidae) in southern India, Zootaxa 3566, pp. 14-22: 15-17

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http://doi.org/ 10.5281/zenodo.210657

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Ooencyrtus alrake Hayat

sp. nov.

Ooencyrtus alrake Hayat   , sp. nov.

(Figs 1–7)

Female. Holotype. Length, 1.48 mm. Body dark brown to black; frontovertex with purple and bluish lustre, bluish green above scrobes; face purple. Antenna (Fig. 1) with radicle and scape dark brown; pedicel brownish yellow with about basal half brown; funicle and clava pale brownish yellow. Mesosoma with mesoscutum light bluish green; scutellum light bluish green basally and on sides, otherwise largely purple; tegula dark brown. Wings hyaline. Legs with coxae and femora dark brown; fore tibia brownish at base, becoming yellow apically; mid tibia dark brown with about apical quarter yellow; hind tibia brown, becoming brownish yellow apically; tarsi yellow; mid tibial spur yellow except apex pale brown. Gaster with TI largely bluish, other tergites purple with bronzy lustre.

Head. Occipital margin sharp; frontovertex width 0.3 × head width; ocellar triangle with dorsal angle slightly acute; POL, OOL and OCL ratios, 9: 1.5: 4; head, in frontal view, 1.14 × as broad as high; scrobes moderately deep, inverted U-shaped with rounded margins; torulus with dorsal margin above level of ventral eye margin and ventral margin separated from mouth margin by a distance slightly greater than own length (8: 7); eye height 1.93 × malar space; frontovertex with slightly raised reticulate sculpture, the cells small, and with fine setigerous punctures; malar space with elongate reticulate sculpture; setae on head silvery white except brown between posterior ocelli and occipital margin; eyes bare. Mandible (Fig. 2) with two teeth and a truncation, lower tooth separated from the middle tooth by a deep V-shaped incision. Antenna with scape flattened and expanded in distal half, 2.7 × as long as broad; F 1 1.2 × as long as pedicel; F 1 –F 4 longer than broad; F 5 quadrate and F 6 1.3 × as broad as long; clava distinctly broader than F 6 (6.5: 5.25), slightly shorter than F 4 –F 6 combined, and with all three segments transverse. (In two paratypes: scape 2.81 × and 2.96 × as long as broad; F 1 1.05 × and 1.13 × as long as pedicel; F 4 in the slidemounted paratype (Fig. 1) appears quadrate, and F 6 1.5 × as broad as long.) Relative measurements —head dorsal width, 52.5; frontovertex width, 16; head frontal height, 46; eye height, 31; malar space, 16; antennal scape length, 15.5; scape width, 5.75.

Mesosoma 1.55 × as long as metasoma (62: 40); mesoscutum 1.2 × as long as scutellum (30: 25); scutellum as long as wide, and 5 × as long as median length of propodeum (25: 5); mesoscutum with fine polygonal reticulations, the cells very small and slightly transverse, with minute setigerous punctures; scutellum with raised reticulate sculpture, the sides with reticulations elongate; setae brown; propodeum with several silvery white setae on sides. Fore wing 2.45 × as long as broad; marginal vein slightly shorter than postmarginal, the latter shorter than stigmal vein (ratios, 0.75: 0.81:1.0); ventral surface of costal cell with 3 lines of setae in proximal half, and 2 lines of setae in distal half; linea calva open posteriorly; venation and setation as in Fig. 3. Hind wing 3.7 × as long as broad. Relative measurements (paratype slide)—mid tibia length, 62; mid basitarsus length, 17; mid tibial spur length, 19.

Metasoma. Ovipositor and hypopygium as in Figs 4 and 5. Relative measurements (paratype slide)— TVII length, 42.5; ovipositor length, 59.5; third valvula length, 15.

FIG URES 1–7. Ooencyrtus alrake Hayat   , sp. nov. Female: 1, antenna; 2, mandibles; 3, basal part of fore wing; 4, ovipositor; 5, hypopygium. Male: 6, antenna; 7, distal part of genitalia.

Male. Length, 1.66 mm. Similar in colour and sculpture to female, except for head dimensions, antenna and genitalia. Frontovertex width 0.42 × head width; head in frontal view 1.18 × as broad as high; torulus with ventral margin above level of ventral eye margin and separated from mouth margin by 2.42 × own length (17: 7). Antenna (Fig. 6) with scape slightly more than 2 × as long as broad (14.5: 7); pedicel subtriangular, slightly broader than long; F 1 longest, several times longer than pedicel, and 1.37 × as long as F 2; funicle segments all longer than broad; clava 2 -segmented, shorter than F 5 and F 6 combined; flagellar segments with short setae. Genitalia with distinct parameres (Fig. 7); phallobase 0.45 × mid tibia length; digitus long, with a denticle.

Material examined. Holotype ( NPC, Registration No. 136 / 13 / 124 / 1), female (on card) labelled “ INDIA: KERALA: Kozhikode, Calicut, 27.x. 2011, Coll. U.A. Saleem” and “ Trioza jambolanae   on Syzygium cumini   ”.

Paratypes: 3 females, 2 males: 2 females (one on card, the second specimen on slide under 5 coverslips, slide No. EH. 1450) with same data as holotype; 1 female (on slide under 5 coverslips, slide No. EH. 1452), 2 males (one on card, the second on slide under 4 coverslips, slide No. EH. 1453), with same data as holotype, except collection date is 19.x. 2011. ( ZDAMU, Registration No. HYM. CH. 657).

Host. Trioza jambolanae Crawford   ( Hemiptera   : Triozidae   ) ( Fig. 24 View FIGURES 21 – 25 ) from leaf galls of Syzygium cumini   (L.) ( Fig. 23 View FIGURES 21 – 25 ).

Distribution. India: Kerala.

Comments. This new species of Ooencyrtus   is distinct from all other described species by the following combination of characters: antennal torulus with dorsal margin slightly above level of ventral eye margin and ventral margin separated from mouth margin by a distance slightly greater than own length; mandible with ventral tooth separated from middle tooth by a deep V-shaped incision; antenna with scape flattened and expanded in distal half, slightly less than 3 × as long as broad; F 1 slightly to distinctly longer than pedicel, and nearly 3 × as long as broad; clava robust, 1.2 × as broad as the transverse F 6, and shorter than F 4–6 combined; fore wing with marginal vein about 2.5 × as long as broad, but slightly shorter than postmarginal vein; stigmal vein longer than both marginal and postmarginal veins (1.0: 0.75: 0.81).

I checked all available descriptions and figures of Ooencyrtus   species (e.g., Huang & Noyes 1994; Noyes 1985, 2010; Prinsloo 1987; Trjapitzin 1989; Zhang et al. 2005) and found that this new species does not agree with any of these. Further, there are no earlier records of any Ooencyrtus   species parasitizing psylloids ( Noyes, 2012).

Etymology. The species name is an anagram of ‘Kerala’ State.


National Pusa Collection