Xenomerus scutellatus 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 : 43-44

Xenomerus scutellatus Mikó & Masner , new species

Figure 72

FEMALE (Holotype): Length= 1.56 mm.

Black, legs excluding brown coxae and apical tarsomeres yellow, interantennal process, radicle, A1–A6, mandible, brown, clava dark brown.

FCI =1.16; LCI =1.64; HW/IOS =1.66; head less than 1.5 times as wide as mesosoma (HW/TSL = 1.40); facial striae reaching midlevel of eye along inner orbit, exceeding frontal patch; frontal patch distinct, vertically elongated, reaching eye midlevel; frons setae sparse, thin; central keel complete; toruli triangle shorter than clypeus height; POL less than 1.5 times as long as OOL (POL/OOL =1.26); OOL more than 1.5 times as long as LOL (OOL/LOL =1.72); hyperoccipital carina absent; vertex reticulate; genal patch present, not merging with vertex sculpture; A1 more than 5.0 times as long as radicle (A1/r =5.5), shorter than clava (A1/cl =0.88).

Epomial carina present, diminishing medially; cervical pronotal area smooth, with scattered setae; lateral pronotal area near epomial carina reticulate with few crenulae above pronotal ventral projection; netrion sulcus complete; netrion sculpture not extending onto lateral pronotal area; pronotal suprahumeral and cervical sulci complete, foveolate; mesoscutum almost 1.5 times as wide as long (TSL/ML =1.44); almost reaching transscutal line; reticulate sculpture of mesoscutum extending to lateral and internotaular areas, not reaching posterior margin; mesoscutellum about 2.0 times as wide as long (SW/SL =1.89); scuto-scutellar sulcus slightly diminishing medially, 2 times as wide laterally as in the middle; mesoscutellum anteriorly rugulose, with sparse, scattered setae; posterior scutellar sulcus extending onto axillula; sternaulus separated from anterior row of foveae of mesopleural carina, reduced; distance between postacetabular sulcus and anterior row of foveae of mesopleural carina 3–4 times as wide as foveae width of postacetabular sulcus; mesopleural carina complete, with complete rows of foveae; foveae of upper part of metapleural sulcus 4–5 times as wide as foveae along metapleural carina; metascutellum sharply pointed; propodeal lateral carinae inverted Y-shaped, shafts slightly curved outward; propodeal lateral area and plical area obscured by pale, sparse setae, marginal striation extending medially; posterior propodeal projection distinct; fore wing wider than mesoscutum (TSL/WW =0.83); marginal vein about 3.5 times as long as stigmal vein (m/st =3.46); hind wing 3 times as wide as marginal cilia length (HWW/HWS =3.0).

T1 concave dorsally, less than 1.5 times as wide as T1+T2 length (T1W/T1+T2L =1.37); T3 less than 1.5 times as wide as long (T3W/T3L=1.41), as wide as mesoscutum (T3W/TSL =1.13); costae on T3 exceeding level of apical setae; lateral patch distinct, 4 times as long as wide; diameter of posterior patch of T3 nearly equal to width of one basal depression; posterior T3 smooth; anterior 1/3 T4 reticulate, with a median narrow smooth area.

Variability (n=4): Length= 1.56–1.63 mm (m=1.59, SD =0.01); FCI =1.12–1.16 (m=1.14, SD =0.02); LCI =1.56–1.64 (m=1.60, SD =0.05); HW/IOS =1.66–1.67, m=1.66, SD =0.00); HW/TSL =1.33–1.40 (m=1.36, SD =0.04); POL/OOL =1.23–1.26 (m=1.25, SD =0.01); OOL/LOL =1.72–1.75 (m=1.73, SD =0.01); A1/r =5.23–5.50 (m=5.36, SD =0.19); A1/cl =0.88–0.89 (m=0.88, SD =0.01); TSL/ML =1.44–1.45 (m=1.44, SD <0.01); SW/SL =1.88–1.89 (m=1.89, SD <0.01); TSL/WW =0.83–0.85 (m=0.84, SD =0.01); m/st =3.66– 3.71 (m=3.68, SD =0.03); HWW/HWS =3.00–3.06 (m=3.01, SD =0.04); T1W/T1+T2L =1.37–1.40 (m=1.38, SD =0.04); T3W/T3L =1.33–1.41 (m=1.37, SD =0.05); T3W/TSL =1.13–1.21 (m=1.17, SD =0.05)

MALE: Unknown

Diagnosis. Most closely related to Xenomerus kalocsai , differing by the anteriorly rugulose mesoscutellum.

Etymology. Named after the unique sculpture of mesoscutellum.

Material examined. Holotype female: UGANDA: Masindi District, Budongo Forest near Sonso 1.75, 31.5833, 11–20.VII.1995, T.Wagner [ CNCI: 23920] . Paratypes: UGANDA: Masindi District, Budongo Forest near Sonso 1.75, 31.5833, 11–20.VII.1995, T.Wagner, 2♀ . Other material: UGANDA: District Masindi, Budongo Forest near Sonso 1.75, 31.5833, 11–20.VII.1995, T.Wagner, 1♀ (on slide) . Holotype and paratypes are deposited in CNCI.