Xenomerus halteratus Mikó & Masner, 2010

Mikó, I., Masner, L. & Deans, A. R., 2010, World revision of Xenomerus Walker (Hymenoptera: Platygastroidea, Platygastridae) 2708, Zootaxa 2708, pp. 1-73 : 28-29

Xenomerus halteratus Mikó & Masner , new species

Figures 12, 52, 54, 56, 58, 111

FEMALE (Holotype): Length= 1.02 mm.

Orange yellow, A3–A12, interocellar area, mesoscutellum, metasoma apically brown.

FCI =1.20; LCI =1.54; HW/IOS =1.70; head less than 1.5 times as wide as mesosoma (HW/TSL = 1.36); facial striae extending to vertex obscuring frontal patch; frontal patch distinct; frons setae dense, thin, setal bases pustulate, median smooth area above interantennal process 4–5 times as wide as clypeus width; frons above median smooth area rugulous; central keel complete; toruli triangle shorter than clypeus height, not reaching eye midlevel; POL shorter than OOL (POL/OOL =0.72); OOL about 2.5 times as long as LOL (OOL/LOL =2.57); hyperoccipital carina present, blunt, not extending to inner orbit; vertex entirely granulose, sculpture extending to gena and obscuring genal patch; A1 more than 7 times as long as radicle (A1/r =7.14), about as long as clava (A1/cl =1.14).

Epomial carina absent; cervical pronotal area with transverse crenulae, lateral pronotal area coriaceous, cells of coriaceous sculpture in vertical rows; Netrion sulcus complete; netrion sculpture not extending onto lateral pronotal area; pronotal suprahumeral and cervical sulci not foveolate; mesoscutum more than 1.5 times as wide as long (TSL/ML =1.81); notaulus shortened, not reaching transscutal line; mesoscutum with dense setae, granulose sculpture reaching posterior margin; mesoscutellum more than 2 times as wide as long (SW/ SL =2.10); scuto-scutellar sulcus slightly diminishing, 2 times as wide laterally as in the middle; mesoscutellum coriaceous anteriorly, with dense, thin setae; posterior scutellar sulcus extending onto axillula; sternaulus not separated from anterior row of foveae of mesopleural carina; distance between postacetabular sulcus and anterior row of foveae of mesopleural carina 2–3 times as long as foveae width of postacetabular sulcus; mesopleural carina complete, with complete rows of foveae, maximal distance between posterior row of foveae of mesopleural carina and mesepimeral sulcus three times as long as width of posterior row of foveae of mesopleural carina; epicoxal and lower part of metapleural sulci separated; sulcus along metapleural carina foveolate; metascutellum bluntly triangular, basal striation extending apically; propodeal lateral carinae inverted V-shaped, shafts slightly curved inward; propodeal lateral and plical areas obscured by pale, dense setae, setal bases pustulate; marginal striation extending medially; posterior propodeal projection distinct; fore and hind wings reduced.

T1 more than 2.5 times as wide as T1+T2 length (T1W/T1+T2L =2.66); T3 as wide as mesoscutum (T3W/TSL =1.03), costae on T3 reaching apical 1/3 of tergum; posterior 2/3 of tergum reticulate, lateral and posterior patches indistinct, obscured by reticulate sculpture; T4 entirely reticulate.

Variability (n=9): Length = 0.92–1.09 mm (m=0.99, SD =0.06); in smaller specimens body lighter; FCI =1.18–1.27 (m=1.22, SD =0.03); LCI =1.54–1.77 (m=1.65, SD =0.07); HW/IOS =1.57–1.77 (m=1.68, SD =0.06); HW/TSL =1.32–1.41 (m=1.37, SD =0.03); POL/OOL =0.64–0.75 (m=0.70, SD =0.07); OOL/ LOL =2.40–2.66 (m=2.55, SD =0.09); A1/r =5.75–7.33 (m=6.53, SD =0.54); A1/cl =1.00–1.16 (m=1.10, SD =0.03); TSL/ML =1.64–1.83 (m=1.72, SD =0.08); SW/SL =2.0–2.25 (m=2.14, SD =0.10); one specimen fully winged, TSL/WW =1.17; m/st =4.28; HWW/HWS =1.53; T1W/T1+T2L =1.25–2.66 (m=1.88, SD =0.48); T3W/TSL =0.93–1.11 (m=1.03, SD =0.06) .

MALE: unknown.

Diagnosis. Most closely related to X. melleus , differing in the rugulose frons, shortened wing and complete mesopleural carina. Differs from X. rugifrons by shorter toruli triangle, shorter radicle, simple pronotal suprahumeral sulcus, shorter notaulus, netrion striation not extending onto lateral pronotal area, bluntly triangular metascutellum, reduced wings, posteriorly reticulate T3 and entirely sculptured T4.

Etymology. The species name refers to the reduced wings.

Material examined. Holotype female: AUSTRALIA: Queensland, 630km. Mount Glorious National Park , 28.II.1984, L.Masner, Tropical rain & sclerophyl forest [ ANIC:####] . Paratypes: New South Wels, Barrington Tops State Forest , 1000m, 11.II.1984, L.Masner, 1♀ ; Queensland Main Range National Park , - 28.05,152.3997, 9.XII.2002, Owen, George, Munro, sweeping, 1♀ ; Queensland, Mount Glorious National Park , II.1989, H.Howden, 1♀ ; Queensland, Mount Glorious , -27.3316, 152.7580, 17–23.I.1998, N.Power, MT, 1♀ ; Queensland, 630km. Mount Glorious National Park , 28.II.1984, L.Masner, Tropical rain & sclerophyl forest, 2♀ [ ANIC], 17♀ ; Queensland, Tamborine National Park (45km south of Brisbane), 700m 3.III.1984, L.Masner, Sclerophyl Eucalyptus forest , 5♀ .

Other material examined. Queensland, 630km. Mount Glorious National Park , 28.II.1984, L.Masner, Tropical rain & sclerophyl forest, 1♀, (on slide) . Holotype is deposited in ANIC . Paratypes are deposited in ANIC (2) and CNCI (26) .

Comments. Only one specimen (NSW) has well developed wings.