Xenomerus rugifrons 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 : 42-43

Xenomerus rugifrons Mikó & Masner , new species

Figures 53, 55, 57, 59

FEMALE (Holotype): Length= 1.52 mm.

Dark brown; interantennal process, radicle, A1, A2, mandible, legs, excluding brown coxae, yellow.

FCI =1.14; LCI =2.0; HW/IOS =1.60; head less than 1.5 times as wide as mesosoma (HW/TSL = 1.33); facial striae extending to vertex, obscuring frontal patch; frons setae dense, setae thin, setal bases pustulate, median smooth area above interantennal process as wide as clypeus width; frons above median smooth area rugulose; central keel complete; toruli triangle longer than clypeus height, exceeding eye midlevel; POL shorter than OOL (POL/OOL =0.80); OOL more than two times as long as LOL (OOL/LOL =2.27); hyperoccipital carina present, blunt, not extending to inner orbit; vertex patch present, diameter two times as large as lateral ocellus; vertex setae denser behind POL area, setal bases pustulate; genal patch absent; A1 less than 3.0 times as long as radicle (A1/r =2.79), about as long as clava (A1/cl =0.98).

Epomial carina absent; cervical pronotal area smooth, with scattered setae; lateral pronotal area transversely striated; netrion sulcus complete, netrion sculpture extending and almost entirely obscuring lateral pronotal area; pronotal suprahumeral sulcus slightly diminishing medially, complete, foveolate; pronotal cervical sulcus not foveolate; mesoscutum more than 1.5 times as wide as long (TSL/ML =1.63); notaulus elongate, almost reaching anterior margin of mesoscutum; mesoscutum with dense thin setae, sculpture extending to posterior margin; mesoscutellum more than 2.0 times as wide as long (SW/SL =2.16); scuto-scutellar sulcus 2 times as wide laterally as in the middle; mesoscutellum smooth, with dense setae, setal bases pustulate; trans-axillar carina separated from axillular carina; 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 nearly equal to 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 half as long as width of posterior row of foveae of mesopleural carina, foveae merging in lower half of mesopleural depression; epicoxal and lower part of metapleural sulci merged; sulcus along metapleural carina foveolate; metascutellum sharply pointed; propodeal lateral carinae inverted V-shaped, shafts slightly curved inward; propodeal lateral area and plical area obscured by pale, dense setae, setal bases pustulate; marginal striation extending medially; posterior propodeal projection distinct; fore wing as wide as mesoscutum (TSL/WW =1.05); marginal vein more than 3 times as long as stigmal vein (m/st =3.66); hind wing more than 2.5 times as wide as marginal cilia length (HWW/HWS =2.62).

T1 less than 2 times as wide as T1+T2 length (T1W/T1+T2L =1.72); T3 as wide as mesoscutum (T3W/ TSL =1.0), costae on T3 reaching almost the apex of tergum; lateral patches indistinct; lateral part of T3 obscured by dense setae extending ¼ width of tergum, setal bases pustulate; diameter of posterior patch of T3 nearly equal to width of two basal depressions; lateral and median patches on T4 present, not fused.

Variability (n=3): Length= 1.19–1.52 mm (m=1.35, SD =0.23); smaller specimens lighter; FCI =1.14–1.16 (m=1.15, SD =0.01); LCI =1.91–2.00 (m=1.95, SD =0.05); HW/IOS =1.56–1.60 (m=1.58, SD =0.02); HW/ TSL =1.33–1.34 (m=1.33, SD <0.01); POL/OOL =0.72–0.80 (m=0.76, SD =0.05); OOL/LOL =2.27–2.40 (m=2.35, SD =0.12); A1/r =2.70–2.79 (m=2.74, SD =0.06); A1/cl =0.91–0.98 (m=0.95, SD =0.04); TSL/ ML =1.63–1.66 (m=1.65, SD =0.02); SW/SL =2.08–2.16 (m=2.12, SD =0.06); TSL/WW =1.00; m/st =3.66; HWW/HWS =2.50–2.62 (m=2.56, SD =0.08); T1W/T1+T2L =1.72–1.73 (m=1.72, SD <0.01); T3W/ TSL =1.00–1.11 (m=1.05, SD =0.08).

MALE: Unknown

Diagnosis. Differs from all other species of comatus group by the elongate toruli triangle, dorsally rugulose frons and not foveolate cervical sulcus. Most closely related to X. halteratus , differing in transversely striated lateral pronotal area, foveolate pronotal suprahumeral sulcus, well developed wings and T3 without reticulate sculpture posteriorly.

Etymology. The species name refers to rugulous sculpture of the frons.

Material examined. Holotype female: MALAYSIA: Pasoh Forest Res. Negri S. 06.VII.1976, P.Becker, M.Becker [ CNCI: 23919] . Paratypes: MALAYSIA: Sabah, Danum Valley , 18.XII.–18.I.1987, M.Still, MT, 1♀ . INDONESIA: Kalimantan (Borneo), East Kalimantan, 38km North of Balikpapan, Samboja , 1– 30.VI.1992. D.C.Darling, U.Rosicho, Sutrisno, (IIS920209), 1♀ . Holotype and paratypes are deposited in CNCI.