Xenomerus cornutus Kononova & Kozlov, 2001

Mikó, I., Masner, L. & Deans, A. R., 2010, World revision of Xenomerus Walker (Hymenoptera: Platygastroidea, Platygastridae) 2708, Zootaxa 2708, pp. 1-73 : 22-23

Xenomerus cornutus Kononova & Kozlov, 2001

Figures 31, 33

Trimorus cornutus Kononova & Kozlov, 2001: 238 . Original description.

FEMALE (Holotype): Length= 0.71 mm.

Brown; radicle, trochanters and tarsomeres, except apical brown tarsomeres, yellow.

FCI =1.16; LCI =1.5; HW/IOS =1.61; head less than 1.5 times as wide as mesosoma (HW/TSL = 1.40); facial striae not reaching midlevel of eye, exceeding frontal patch; frontal patch distinct; frons setae sparse, thin; central keel incomplete; POL as long as OOL (POL/OOL =1.05); OOL more than 1.5 times as long as LOL (OOL/LOL =1.58); hyperoccipital carina absent, vertex entirely reticulate, vertex sculpture extending to interocellar area, merging posteriorly with genal patch; A1 less than 5.0 times as long as radicle (A1/r =4.20), shorter than clava (A1/cl =0.88).

Epomial carina absent, cervical pronotal area smooth, with sparse setae, setal bases pustulate; lateral pronotal area smooth with few crenulae above pronotal ventral projection; netrion sulcus complete; netrion striation not extending onto lateral pronotal area; pronotal suprahumeral and cervical sulci not foveolate; mesoscutum about 1.5 times as wide as long (TSL/ML =1.45); notaulus short, not exceeding transscutal line; distance between posterior end of notauli more than two times as long as distance between posterior end of notaulus and posterolateral edge of mesoscutum; reticulate sculpture extending to inter and lateral notaular areas, not reaching posterior margin of mesoscutum; mesoscutellum about 2 times as wide as long (SW/ SL =1.91); scuto-scutellar sulcus almost as wide medially as laterally; mesoscutellum smooth, with sparse marginal setae; posterior scutellar sulcus not extending onto axillula; sternaulus not separated from anterior row of foveae of mesopleural carina; mesopleural carina incomplete; sulcus along metapleural carina foveolate; metascutellum triangular, only base striated, with a triangular, semitransparent lamella apically; propodeal lateral carinae inverted V-shaped, shafts straight; propodeal lateral area and plical area with dense setae, marginal striation extending medially; posterior propodeal projection indistinct; mesoscutum slightly wider than fore wing (TSL/WW =1.14); marginal vein less than 5 times as long as stigmal vein (m/st =4.75); hind wing about as wide as marginal ciliae length (HWW/HWS =1.08).

T1 about 1.3 times as wide as T1+T2 length (T1W/T1+T2L =1.28); T3 1.5 times as wide as long (T3W/ T3L =1.50), about 1.2 times as wide as mesoscutum (T3W/TSL =1.21); costae on T3 not exceeding 1/5 tergum; lateral patch present, reduced; posterior patch of T3 reduced, nearly equal to width of 2–3 basal depressions; lateral patch on T4 present, median patch absent.

MALE (n=1): antennae and legs, excluding apical brown tarsomeres; length=0.78; FCI =1.21; LCI =1.48; HW/IOS =1.6; HW/TSL =1.29; POL/OOL =1.0; OOL/LOL =2.0; A1/r =2.77; TSL/ML =1.42; SW/SL =1.78; TSL/WW =1.12; m/st =4.2; 4.66; HWW/HWS =1.07; T1W/T1+T2L =1.04; T3W/TSL =1.0.

Diagnosis. Differs from X.calligetus in ventrally smooth frons, posteriorly smooth mesoscutum, more elongate metasoma and narrower fore wing.

Material examined. Holotype female: RUSSIA: Primorskiy Krai, Khanka Lake Nature Reserve , 15.VIII.1977, Kononova, (original det. label: Trimorus cornutus K.K.) Other material: JAPAN: Honshu Island, Kanto region , Ibaraki Prefecture, Tsuchiura City , Shishizuka-Oika , 13–25.VII.1989, M.J.Sharkey, MT, marsh, 1♂ . Holotype is deposited in ZMAS .