taxonID	type	description	language	source
9C20878CDC2517466AED87C1FC60F09F.taxon	type_taxon	Type species: Trigonidium cicindeloides Rambur, 1838.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	description	(Figs. 1, 2, 3)	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	materials_examined	Type materials. Holotype. China: male, Guancunzi, Ningnan, Sichuan, 1 - Ⅴ - 2023, Yuan, Wei, Zheng, Chengjie coll. (SICAU). Paratypes. China: 4 ♂♂ 5 ♀♀, Guancunzi, Ningnan, Sichuan, 1 - Ⅴ - 2023, Yuan, Wei, Zheng, Chengjie coll. (SICAU); 1 ♂ 1 ♀, Guancunzi, Ningnan, Sichuan, 1 - Ⅴ - 2023, Yuan, Wei, Zheng, Chengjie coll. (IZCAS); 2 ♂ 1 ♀, Huaguoshan, Xiangyun, Yunnan, 19 - VII- 2024, Yuan, Wei coll. (SNNU).	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	etymology	Etymology. The specific epithet is from the Latin ‘ albarum ’, means white dorsal area of the forewings of this species.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	diagnosis	Diagnosis. Metafemur with dark coloration of the upper part and light coloration of the lower part (Fig. 2 A, B); tegmina with light dorsal area and dark lateral area (Fig. 1), compound eyes black.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	description	Description. Male (Figs. 1 A, 2 A): Body small, slender; profemur, mesofemur and abdomen black; protibia, mesotibia and most part of metatibia with light color; tegmina mostly light, lateral area dark. Vertex wide and flat, with sparsely setae; frontal wide, not protruding in the dorsal view, slightly wider than antennal scape; compound eyes large, not protruding in the dorsal view; ocellus present, with compound eyes linked by two light stripes; antennal scape broad, cylindrical, flagellum longer than body length; clypeus wide, oval; maxillary palp five segments, terminal segment with obtuse end; labial palpi three segments, the terminal segment enlarged with obtuse end. Pronotum trapezoidal, posterior margin slightly wider than the anterior; anterior, posterior and lateral margins with long setae; the median area of disc with dark marks, lateral area with light marks; lateral lobe mostly black. Procoxa cylindrical with sparsely setae; profemur and protibia covered with hairs; profemur ventral margin with two distinct ridges; tympana absent, protibia terminal with one, slender apical spur; probasitarsus covered abundant short setae; second tarsomeres flattened; third tarsomere shorter than basitarsus, with two curved, serrated claws. Mesofemur and mesotibia covered with small hairs; mesotibia with two apical spurs; tarsus is similar to the prothoracic leg. Metatibia with six subapical spurs (inner three and outer three) and five apical spurs (inner two and outer three), inner longer than outer spur; metabasitarsi not serrulated, with abundant short setae on ventral, apical with one inner and one outer spur, second tarsomeres short, third tarsomere with two curved and serrated claws. Tegmina present and developed, lateral field narrow, with few branches of Sc; R, M + CuA, CuP, PCuA, PCuP, AA and AP neither fused nor branched, without prominent cross-veins between the main veins. Genitalia (Fig. 3). In dorsal view, epiphallus broadened, inner margin of lateral lobe concave, serrated, tapering at the end; in lateral view, lateral lobe with obtuse end, ectoparamere invisible, protrude slightly; in ventral view, ectoparamere short and bifurcated, with straight lower branch. Female (Figs. 1 B, 2 B). Similar to males, tegmina only with longitudinal veins. Ovipositor sword-shaped. Measurements. Male (n = 2). BL 5.21 ± 0.34, PL 0.92 ± 0.10, TL 2.35 ± 0.24, HFL 3.16 ± 0.11; Female (n = 2). BL 6.12 ± 0.31, PL 0.85 ± 0.06, TL 2.74 ± 0.23, MFL 4.98 ± 0.11 OL 0.43 ± 0.10.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2517446AED86FCFD00F3D0.taxon	discussion	Remarks. Based on the absent of tympana, similar vein patterns of wings in both sexes, and developed and bifurcated ectoparamere, this new species can be assigned to Trigonidium. The new species shares similar features of epiphallus (broad, concave, serrated lateral lobe, and tapering at the end) and ectoparamere (short and bifurcated) with Trigonidium cicindeloides Rambur, 1838, Trigonidium nigripes Yuan, Ma & Gu, 2022, and Trigonidium japonicum Ichikawa, 2001, but new species with narrower lateral lobe in lateral view, and can be distinguished from these species by the coloration (colored dark of profemur, mesofemur, and abdomen; colored light of protibia and mesotibia; and colored dark and light of metafemur). The new species shares similar coloration (black profemur, mesofemur and abdomen, light protibia, mesotibia and most part of metatibia, and the tegmina dorsal area mostly white, lateral area black) with Trigonidium rubrumoculum He & Ma, 2022, but T. rubrumoculum has different ectoparamere possessing long and thin upper branch and epiphallic lateral lobe not serrated of its inner margin, and T. rubrumoculum has red compound eyes.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017436AED86A3FC4BF77D.taxon	type_taxon	Type species: Paratrigonidium bifasciatum Shiraki, 1911.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	description	(Figs. 4, 5, 6)	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	materials_examined	Type material. Holotype. China: ♂, Jiange, Guangyuan, Sichuan, 18 - VIII- 2023, Yuan, Wei, Wang, Ning coll. (SICAU). Paratypes. 1 ♂ 2 ♀. China: Jiange, Guangyuan, Sichuan, 18 - VIII- 2023, Yuan, Wei, Wang, Ning coll. (SNNU).	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	etymology	Etymology. The name ‘ prominens ’ is derived from the semi-circular prominence on the inner margin of the lateral lobes.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	diagnosis	Diagnosis. Body dark yellow, epiphallic lateral lobe a with semicircular processes.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	description	Description. Male (Figs. 4, 5): Small, slender, dark yellow. Vertex wide and flat, with sparsely setae, posterior with two light stripe; frontal wide, not protruding in the dorsal view, slightly wider than antennal scape; compound eyes large with irregular dark banding, protruding in dorsal view; ocellus invisible; antennal scape cylindrical with short hairs, pedicel cylindrical, flagellum longer than body length; clypeus wide; maxillary palp five segments, terminal segment long with transverse end; labial palpi three segments, the terminal segment enlarged with transverse end. Pronotum trapezoidal, posterior margin slightly wider than the anterior; anterior, and lateral margins with long setae, posterior margin with short setae; disc and lateral lobe light, with dark rounded spots. Procoxa cylindrical with sparsely setae; profemur and protibia covered with hairs; profemur ventral margin with two distinct ridges; tympana present on outer side, oval, about one fifth of the protibia, protibia terminal with one, slender apical spur; probasitarsus covered abundant short setae, second tarsomeres flattened; third tarsomere shorter than basitarsus, with two curved, serrated claws. Mesofemur and mesotibia covered with small hairs; mesotibia with two apical spurs; tarsus similar to the prothoracic leg. Metatibia with six subapical spurs (inner three and outer three) and five apical spurs (inner two and outer three), inner longer than outer spur; metabasitarsi not serrulated, with abundant short setae on ventral, apical with one inner and one outer spur, second tarsomeres short, third tarsomere with two curved, serrated claws. Tegmina (Figs. 5 C, D) present and developed, lateral field wide, Sc with few branches; R, M + CuA not fused and forked, r-m present; CuPa forked into CuPaα and CuPaβ at the outer corner of mirror, then CuPaα forked into CuPaα 1 and CuPaα 2; one harp vein located between PCuA and CuPa; PCuP fused with PCuA in the basal field, AA fused with AP in the basal field, and then fused with PCuA before dividing vein (d 2); dividing vein short, connect PCuA with CuPaβ, PCuA slightly curved in the chord field, t 1 present; rounded false vein in the mirror; apical field short, with several irregular cells. Genitalia (Fig. 6). In dorsal view, the middle of epiphallus particularly narrowed, widened on both sides, inner margin of lateral lobe with a semicircular protrusion, lateral lobe tapering at the end; in lateral view, lateral lobe with round end, ectoparamere invisible; in ventral view, ectoparamere sheet-like with rounded end. Female (Figs. 4 B, 5 B). Similar to males, tegmina only with longitudinal veins. Ovipositor sword-shaped. Measurements. Male (n = 2). BL 5.32 ± 0.14, PL 0.95 ± 0.14, TL 2.33 ± 0.25, HFL 3.23 ± 0.14; Female (n = 2). BL 4.72 ± 0.21, PL 0.90 ± 0.06, TL 3.12 ± 0.12, MFL 5.02 ± 0.11 OL 0.33 ± 0.15.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
9C20878CDC2017416AED81DEFBA7F5FE.taxon	discussion	Remarks. Based on large oval outer tympana and narrow inner tympana, the lateral lobe of epiphallus with narrow apical projection and the ectoparamere partially join with the epiphallus, this new species can be placed in Svistella. S. prominens sp. nov. can be distinguished from Svistella rufonotata (Chopard, 1932), Svistella dubia (Liu & Yin, 1993), Svistella bifasciata (Shiraki, 1911), Svistella argentata Ma, Jing & Zhang, 2019, and Svistella yayun He, 2024 by smaller ectoparamere (invisible in lateral view). Generally, the new species is similar to S. anhuiensis, and both are found in the same area, but S. prominens sp. nov. possesses the body with darker color, S. anhuiensis with golden head and pronutum, light legs and abdomen. In addition, the genitalia is similar to S. anhuiensis, Svistella fallax He, Li & Liu, 2009, and Svistella wuyong He, 2021 in lateral view, but S. prominens sp. nov. has obvious semicircular processes at the inner margin of the epiphallic lateral lobes in dorsal and ventral view (Fig. 6 A, C), while S. anhuiensis, S. fallax, and S. wuyong has smooth inner margin without processes.	en	Yuan, Wei, Wu, Jiawei, Ma, Li-Bin, Gu, Jun-Jie (2025): Two new species of Trigonidiidae (Orthoptera: Grylloidea) from southwest China. Zootaxa 5570 (3): 574-582, DOI: 10.11646/zootaxa.5570.3.8, URL: https://doi.org/10.11646/zootaxa.5570.3.8
