Platydialepis flavipectoralis Cui, Li & Ma 2026, sp. nov.

Platydialepis flavipectoralis Cui, Li & Ma sp. nov. Fig. 3 Type material. Holotype. China • ♀; Yunnan, Xishuangbanna, Menghai County, Bulang Mountain; 21.74°N, 100.44°E; 2019.V.28–VI.28; Yongsheng Pu leg.; YNAU. Paratypes. China • 1 ♀; same data as holotype • 1 ♀; same location as holotype; 2021.V.27-VI.15; Yongsheng Pu leg.; YNAU • 9 ♀; Yunnan, Xishuangbanna, Menghai County, Bulang Mountain; 21.74°N, 100.45°E; 2018.V.17–VI.21 (2 ♀), 2018.VII.20–VIII.15 (2 ♀), 2018.VIII.15–IX.13 (1 ♀), 2018.IX.13–X.17 (1 ♀), 2019.IV–V.28 (1 ♀), 2019.V.28–VI.28 (1 ♀), 2020.VIII.15–IX.12 (1 ♀); Yongsheng Pu leg.; YNAU • 2 ♀; Yunnan, Xishuangbanna, Menghai County, Guanggang Village; 21.82°N, 100.50°E; 2018.V.16–VI.22 (1 ♀), 2018.IX.16–X.19 (1 ♀); Yongsheng Pu leg.; YNAU. Diagnosis. The new species is similar to P. taiwaniana, but differs from it by the following characteristics (characters of P. taiwaniana in parentheses): Female: apical margin of clypeus with weak median projection (apical margin of clypeus with strong median projection); 1 m-cu received by SMC 2 beyond midpoint (1 m-cu received by SMC 2 before midpoint); forewing with one infuscate spot from outer margin to middle of SMC 2 (forewing with one indistinct infuscate band along outer margin). Male. Unknown. The new species differs from P. amamiensis, 2013 and P. ryoheii by female hind claw with one inner tooth; median projections at apical margin of female clypeus not developed. The new species differs from P. moorei, P. junctella by body yellow with black spots; apical margin of female clypeus distinctly bisinuate; female forewing with Rs 4 longer than Rs 3. The new species differs from P. crinita by body yellow with black spots; apical margin of female clypeus bisinuate. The new species differs from P. hobbyi by female body yellow with black spots; female forewing with broad and distinct infuscate spot apically, reaching SMC 3; apical margin of female clypeus with lateral projections distinctly stronger than median one. Furthermore, female of P. flavipectoralis sp. nov. is also similar to P. bidentata sp. nov., they can be easily separated from all other species by apical margin of clypeus with weak median projection. P. flavipectoralis sp. nov. differs from P. bidentata sp. nov. by body mostly yellow; head in dorsal view with upper frons flat; forewing with apical infuscate spot covering marginal cell and extending to middle of SMC 2; and clypeal lateral projections in P. flavipectoralis sp. nov. stronger than in P. bidentata sp. nov .. Description of female. Body length 13–16 mm, forewing length 12 mm. Body yellow; mandible apices, vertex to middle of frons, apical half of antennal F 1 to F 10, mesoscutum (except for inverted triangular median area), lateral sides of metanotum, metapostnotum, middle of propodeum, metapleuron, metanotum, basal and apical spots on T 1, wavy apical spots on T 2, and basal spots on T 3 – T 5 black; tarsomeres IV and V darkened to blackish brown; median line and posterior margin of pronotum, as well as apical margin of clypeus, with transparent edges. Wings yellowish-brown, hyaline, with one infuscate spot from outer margin to middle of SMC 2. Head and mesosoma densely covered with short golden pubescence; vertex, frons, clypeus, mandibles, propodeum, and lateral sides of T 1 with long, erect, golden setae basally; S 1–6 with sparse, long, erect, brown setae apically; T 5 and T 6 with dense, long, erect, brown bristles; eyes with sparse microsetae. Head. Mandible with two inner teeth; maxillary palpus with fourth segment 1.3–1.4 times as long as third; clypeus large, distinctly wider than LID, apical margin bisinuate with lateral projections distinctly stronger than median one, clypeus elevated middlly, 2.3–2.4 times as wide as long (Fig. 3 B); labrum usually concealed under clypeus, apical margin slightly emarginate medially; frons flat between eye and antennal socket above; eyes slightly convergent dorsally, nearly parallel ventrally, eye width greater than half of frons width (Fig. 3 B); UID: MID: LID = 35: 40: 45; ocelli arranged in one acute triangle, anterior ocellus larger than hind ocelli (Fig. 3 D); vertex nearly flat, ocellar area slightly elevated (Fig. 3 B); in lateral view, width of gena to eye = 15: 23; HW: HL = 80: 70; POD: OOD = 10: 5; ratio of antennal scape, pedicel, and LF 1 = 25: 5: 40, F 1 6.1–6.2 times as long as its greatest width (Fig. 3 C). Mesosoma. Pronotum shorter than mesoscutum, its posterior margin obtusely emarginate (Fig. 3 E); mesoscutum with parapsidal sulcus extending from posterior margin to about 2 / 3 of its length; scutellum and median portion of metanotum slightly elevated; metapostnotum with posterior margin obtusely emarginate medially, with smooth median depression extending from posterior margin to about anterior 4 / 5, anterior 1 / 5 and sides of depression with fine transverse striae; propodeum in lateral view elevated from base to middle, flattened apically, entire surface densely covered with coarse punctures and fine transverse rugae, with one indistinct shallow longitudinal groove medially (Fig. 3 F). Wings. Forewing with three submarginal cells; 1 m-cu received by SMC 2 beyond midpoint, at 0.57–0.63 of cell length from base; 2 m-cu received by SMC 3 before midpoint, at 0.25 from base; length of SMC 3 on M 1.5–1.6 times that of SMC 2; upper margin of SMC 3 1.1–1.2 times as long as that of SMC 2; distance from SMC 3 to outer margin shorter than its own length; marginal cell fusiform, acute apically; M not reaching wing margin (Fig. 3 G); hind wing cu-a arising from or slightly beyond fork of M + CuA (Fig. 3 H). Legs. Metatibia with two rows of scale-like teeth dorsally, inner ones larger than outer ones, each tooth bearing one spine; tarsomere V of all legs without spines ventrally; claws with one inner tooth subapically (Fig. 3 I). Metasoma. Petiole absent; T 1 with lateral crease on both sides, crease not reaching posterior margin of T 1; S 2 with one transverse groove, ends of groove slightly curved posteriorly and extending to middle of lateral side of S 2. Male. Unknown. Etymology. The name flavipectoralis, derived from the Latin words flav- (= yellow) and pectoralis (= thoracic), referring the mesosoma with yellow ground color, one of the main recognition characters of this species. Distribution. China (Yunnan).