On some Encyrtidae (Hymenoptera: Chalcidoidea) associated with gall-inducing psylloids, Phacopteron and Trioza species (Hemiptera: Phacopteronidae, Triozidae) in southern India
Author
Hayat, Mohammad
text
Zootaxa
2012
3566
14
22
journal article
44112
10.5281/zenodo.210657
0cc868b1-b12b-49cc-88fc-84e900434e57
1175-5326
210657
76ECFF1F-238C-413A-B52F-5E8D8680E593
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; F1 1.2× as long as pedicel; F1–F4 longer than broad; F5 quadrate and F6 1.3× as broad as long; clava distinctly broader than F6 (6.5:5.25), slightly shorter than F4–F6 combined, and with all three segments transverse. (In two
paratypes
: scape 2.81× and 2.96× as long as broad; F1 1.05× and 1.13× as long as pedicel; F
4 in
the slidemounted
paratype
(Fig. 1) appears quadrate, and F6 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; F1 longest, several times longer than pedicel, and 1.37× as long as F2; funicle segments all longer than broad; clava 2-segmented, shorter than F5 and F6 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
) from leaf galls of
Syzygium cumini
(L.) (
Fig. 23
).
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; F1 slightly to distinctly longer than pedicel, and nearly 3× as long as broad; clava robust, 1.2× as broad as the transverse F6, and shorter than F4–6 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.