Centistidea paracarinata Liu and Polaszek 2024, sp. n.

Centistidea paracarinata Liu and Polaszek, sp. n. urn:lsid:zoobank.org:act: 88BEBB80-BF37-4939-8BA4-15146F76669A (Figure 4) Diagnosis Body length 1.7 mm, light yellow-brown, except notauli on mesonotum, propodeum and metasoma brown (Figure 4 (a)); head 1.8 × as wide as long, round and not constricted behind eyes in dorsal view; eyes 1.7 × longer than temple in dorsal view; POL:OD:OOL = 2.4:1.0:1.3; a distinct shallow dark sulcus present joining the middle of posterior ocelli and occiput (Figure 4 (b)); face rather transverse, 1.6 × wider than high; clypeus 1.7 × wider than medial length, sparsely setose (Figure 4 (c)); antenna indistinctly longer than body, with penultimate and ultimate flagellomeres 2.9 and 3.2 × longer than wide, 1 st nearly 1.3 × longer than 2 nd (Figure 4 (d)); notauli long and crenulated at anterior 1/2, medial course visible; scutellar sulcus shallowly concave, uncrenulated (Figure 4 (e)); hind depressions of scutellum large and oblong, interspace 0.2 of minor axis of the depression (Figure 4 (g)); propodeum with distinct median carinae reaching posterior transverse carina of propodeum and transverse carinae, anterior part with short rugae along the median carinae and lateral longitudinal carinae at sides (Figure 4 (g)); vein 1-R1 0.7 of pterostigma length (Figure 4 (h)); metasoma 1.2 × longer than mesosoma, with T1 2.3 × longer than its maximum width, T2 2.6 × wider than median length, T3 1.8 × longer than T2 (Figure 4 (l)); ovipositor sheath 0.7 of hind basitarsus, with long and short setae apically (Figure 4 (j)). Description Female. Body length 1.7 mm, Fore wing length 1.9 mm (Figure 4 (a)). Head. 1.8 × as wide as long, 1.2 × wider than mesoscutum in dorsal view. Eyes 1.7 × longer than temple in dorsal view. Temple smooth, nearly impunctate, except minute setose punctures and shiny, round and not constricted behind eyes in dorsal view (Figure 4 (b)). Ocelli small, distance between fore and hind ocellus as long as minor axis of a hind ocellus, POL:OD:OOL = 1.3:1.0:2.4. Frons flat and polished. Vertex between eye and hind ocellus shiny and smooth and pubescent. A distinct shallow dark sulcus present joining the middle of posterior ocelli and occiput. Face (Figure 4 (c)) shallowly, evenly punctate, densely setose, indistinctly convex medially, transverse, 1.6 × wider than high. Clypeus 1.7 × wider than medial length, sparsely setose. Length of malar space as long as basal width of mandible. Antenna (Figure 4 (d)) indistinctly longer than body, with scape, pedicel and 1 st, 2 nd, penultimate and ultimate flagellomeres 1.8, 2.0, 5.8, 5.0, 2.9 and 3.2 × longer than wide, 1 st nearly 1.3 × longer than 2 nd, flagellomeres following 4 th abruptly shortened as about half length of 4 th flagellomere, 5 th flagellomere without acute tooth ventral-apically. Mesosoma Length:width:height = 1.7:1.0:1.2. Mesonotum (Figure 4 (e)) shiny with distinct sparse setose punctures anteriorly, becoming shallower towards posterior half and polished along posterior margin, notauli long and crenulated at anterior 1/2, medial course visible. Scutellar sulcus slightly curved, narrow, shallowly concave, and uncrenulated. Scutellum shiny with minute setose punctures, not glabrous medio-posteriorly, hind depressions (Figure 4 (g)) large and oblong, interspace 0.2 of minor axis of the depression. Propodeum (Figure 4 (g)) shiny, with distinct median carinae reaching beyond costulae, anterior part with short rugae along the median carinae and lateral longitudinal carinae at sides, posterior parts polished, anterior part 2.4 × longer than middle length of metanotum. Mesopleuron (Figure 4 (f)) highly polished, impunctate. Legs. Hind femur (Figure 4 (k)) 3.9 × as long as its widest part. Length of hind femur:tibia: basitarsus = 1.7:2.3:1.0. Basitarsus of hind leg 0.7 as long as tarsomeres 2–5. Wings. Fore wing: pterostigma narrow, 2.2 × as long as its widest part (Figure 4 (h)); vein 1-R1 0.7 of pterostigma length; vein r:2-SR:2-M = 1.0:5.9:2.8, 1-SR:1-M = 1.0:3.7, 1-CU1:2- CU1 = 1.0:2.0; first discal cell of fore wing less than 1.2 × wider than high. Hind wing (Figure 4 (i)): vein M+ CU:1-M:r-m = 2.1:2.6:1.0. Metasoma. 1.2 × longer than mesosoma. T1 (Figure 4 (l)) smooth, spoon-shaped (attenuated apically), 2.3 × longer than its subapical maximum width, distinctly narrowed anterio-medially. T2 wide, 2.6 × wider than median length. T3 1.8 × longer than T2, longitudinally striate. Hypopygium not reaching apex of metasoma. Ovipositor sheath 0.7 of hind basitarsus, with long and short setae apically (Figure 4 (j)). Colour. Light yellow-brown, except notauli on mesonotum, propodeum and metasoma brown (Figure 4 (a)). Palpi and spurs pale yellow. Antenna (except apical segment yellow) and ovipositor sheath brown. Legs pale yellow to yellow, except tips of apical tarsomeres. Wing membranes hyaline, pterostigma, vein r, 2-SR, 1-SR, 1-M and 1-CU1 darker brown, other veins light brown. Male Similar to female, except darker brown and antenna not pale apically. Host Unknown. Material examined (NHMUK) Holotype: 1♀, Malaysia, Borneo, Sabah, Maliau Plot 8 (Trap MT1), DMQI September/ October 2012, No. NHMUK101639280. Paratypes: 1♀, same data except Plot 5 (Trap MT2), No. NHMUK101639296; 1♂, Brunei (E115°7′ N4°34′), Kuala Belalong Field Studies Centre (Malaise), N Mawdsley coll., 18 May 1991. BMNH (E) 1991–173, No. NHMUK101639282. Distribution BRUNEI; MALAYSIA: Borneo: Sabah. Etymology The specific name ‘ paracarinata ’ refers to its propodeum with lateral longitudinal carinae beside the median carina. Remarks This species is similar to C. nyeringensis Ranjith and Priyadarsanan, 2023, but differs in the following characters: clypeus 1.7 × wider than medial length (2.6 × in C. nyeringensis); vein 1-R1 longer, 0.7 of pterostigma length (indistinct in C. nyeringensis); and anterior part of propodeum with short rugae along the median carinae and lateral longitudinal carinae at sides (no carinae beside the median carinae there in C. nyeringensis).