Xenomerus laticeps Dodd, 1916

Mikó, I., Masner, L. & Deans, A. R., 2010, World revision of Xenomerus Walker (Hymenoptera: Platygastroidea, Platygastridae) 2708, Zootaxa 2708, pp. 1-73 : 31-33

Xenomerus laticeps Dodd, 1916

Figures 10, 74, 75, 77, 79

Xenomerus laticeps Dodd, 1916: 28 . Original description. Dodd, 1930:89, 90 (description, keyed). FEMALE (n=5): Length= 0.99–1.18mm (m=1.11, SD =0.08).

Dark brown; head, mesoscutum blackish; mandible, apex of interantennal process, radicle, legs excluding hind brown tarsomeres yellow, antenna dark brown.

FCI =1.14–1.21 (m=1.17, SD =0.02); LCI =1.74–1.78 (m=1.77, SD =0.01); HW/IOS =1.50–1.62, m=1.56 SD =0.04); head almost 1.5 times as wide as mesosoma (HW/TSL =1.41–1.52, m=1.46, SD =0.05); facial striae exceeding midlevel of eye, parallel on frons, obscuring frontal patch; frontal patch indistinct; frons setae sparse, thin; central keel complete; toruli triangle shorter than clypeus height; POL as long as OOL (POL/ OOL =0.95–1.10, m=1.03, SD =0.05); OOL about 2 times as long as LOL (OOL/LOL =2.00–2.10, m=2.04, SD =0.06); hyperoccipital carina absent; sometimes vertex finely reticulate, vertex sculpture merges with vertex patch, sometimes only vertex patch present, vertex smooth posterior to POL; genal patch present; A1 about 5 times as long as radicle (A1/r =5.00–5.62, m=5.18, SD =0.25), about as long as clava (A1/cl =0.94– 1.10, m=1.01, SD =0.05).

Epomial carina absent, cervical and lateral pronotal areas smooth, bare; netrion sulcus absent; netrion sculpture extending onto lateral pronotal area; pronotal suprahumeral and cervical sulci complete, foveolate; mesoscutum about 1.5 times as wide as long (TSL/ML =1.54–1.59, m=1.57, SD =0.02); notaulus normal, almost reaching transscutal line; reticulate sculpture of mesoscutum not extending to lateral and internotaular areas; mesoscutellum more than 2 times as wide as long (SW/SL =2.20–2.50, m=2.33, SD =0.13); scutoscutellar sulcus diminishing medially, 4–5 times as wide laterally as in the middle; mesoscutellum smooth, with sparse, long marginal setae; posterior scutellar sulcus not 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 equal to foveae width of postacetabular sulcus; mesopleural carina complete, with complete rows of foveae; foveae of mesepimeral sulcus not elongated, 1–1.5 times as long as wide; sulcus along metapleural carina foveolate; metascutellum sharply pointed, spine elongated; propodeal lateral carinae inverted Y-shaped, shafts distinctly curved outward; propodeal lateral area and plical area obscured by pale, dense setae, setal bases pustulate, marginal striation not extending medially; posterior propodeal projection indistinct; fore wing about as wide as mesoscutum (TSL/WW =0.93–1.08, m=0.98, SD =0.06); marginal vein 3 times as long as stigmal vein (m/st =2.9–3.1, m=3.0, SD =0.07); hind wing about two times as wide as marginal ciliae length (HWW/HWS =1.86–2.14, m=1.98, SD =0.10).

T1, less than 1.5 times as wide as T1+T2 length (T1W/T1+T2L =1.23–1.48, m=1.32, SD =0.09); T3 about as wide as long (T3W/T3L =0.97–1.01, m=1.0, SD =0.01), as wide as mesoscutum (T3W/TSL =0.97–1.01, m=1.0, SD =0.01); costae on T3 reaching 1/2 of tergum medially; lateral patch distinct, reduced; diameter of posterior patch of T3 nearly equal to width of two basal depressions, sometimes posterior and lateral patches more extended, diameter of posterior patch equal with 4 basal depressions; lateral patch on T4 present, median patch marked by punctures.

MALE: (n=5): FCI =1.25–1.31 (m=1.26, SD =0.02); LCI =1.54–1.74 (m=1.63, SD =0.06); HW/IOS =1.41– 1.51, (m=1.46 SD =0.03); POL/OOL =0.81–0.95 (m=0.89, SD =0.05); OOL/LOL =2.27–2.50 (m=2.38, SD =0.08); A1/r =4.1–4.4 (m=4.22, SD =0.14); A5 not modified, A2–A6 unibottled, A7–A11 dibottled, flagellomeres with few ventral microcilia; SW/SL =2.00–2.11 (m=2.05, SD =0.04); TSL/WW =0.80–0.96 (m=0.86, SD =0.07); T1W/T1+T2L =1.16–1.24 (m=1.23, SD =0.05);

Diagnosis. Most closely related to X. varipes , differing by the presence of the vertex patch, few ventral microcilia on male flagellomeres, finely reticulate mesoscutum of females, absence of netrion sulcus, less transverse fovea of mesepimeral sulcus and sharply pointed metascutellum with elongate metanotal spine.

Material examined. Holotype female: AUSTRALIA: New South Wels, (original det labels: “ Xenomerus , laticeps, Dodd ♀ type” (1. label); “I. 5428, Xenomerus , laticeps Dodd , n.s Wales, also slide” (2. Label).

Other material examined. AUSTRALIA: Australian Capital Territory, Canberra, Black Mountain , - 35.2666, 149.01, 22–29.XI.1998, G.A.P.Gibson, MT, 1♂ ; Australian Capital Territory, Canberra, Black Mountain , -35.2666, 149.01, 30.XI–06.XII.1998, G.A.P.Gibson, MT, 1♂ ; Australian Capital Territory, Canberra, Black Mountain , -35.2666, 149.01, 07–13.XII.1998, G.A.P.Gibson, YPT, 1♂ ; New South Wels, Royal National Park, 20km. south of Sydney , 30m, 5–14.VI.1978. S.N.Peck, dry sclerophyl forest edge, MT, 1♂ ; New South Wels, 5km. NE Nerriga, 600m, 19.I–4.II.1984, L.Masner, MT, dry sclerophyl Eucalyptus forest , 2♂ ; New South Wels, Barrington Tops State Forest , 1000m, 11.II.1984, L.Masner, 1♀ ; Queensland, Brisbane Forest Park, -27.4177, 152.83, 24–30.I.1998, N.Power, MT, across creek, 1♀ ; Queensland, Brisbane Forest Park, -27.4168, 152.8369, 6–13.II.1998, N.Power, MT, 1♀ ; Queensland, Brisbane Forest Park, - 27.4177, 152.83, 30.VIII.–04.IX.1998, N.Power, MT, 1♀ ; Queensland, Brisbane Forest Park , Queensland, Davies Creek National Park, E. of Mareeba, 2.XII.82. Z.Bouček, 2♀ ; Queensland, Cooloola National Park, 30m, 7.III.1984, L.Masner, Rain forest on sands, 3♂ ; Queensland, Gordonvale, Goldsborough State Forest , 6.IX.1994, M.Schauff, 2♂ ; Queensland, Main Range National Park , -28.054, 152.3794, 700m, 10– 11.XII.2005, YPT, A.R.Deans, creek bed, 1♂ ; Queensland, 700m, Mount Tamborine Natinal Park , 3.III.1984, L.Masner, 1♀ ; Victoria, Cann River, 18–26.V.1978, S.Peck, J.Peck, Flood plains Eucalyptus forest , 1♂ .

Holotype is deposited in SAMA.