Trigonidium (Paratrigonidium)

Tan, Ming Kai, Baroga-Barbecho, Jessica B. & Yap, Sheryl A., 2019, Taxonomic notes on Trigonidium and related groups with one new species from the Philippines (Orthoptera: Trigonidiidae; Trigonidiinae), Zootaxa 4564 (2), pp. 573-587 : 576-577

Paratrigonidium Brunner von Wattenwyl, 1893

Paratrigonidium : Brunner von Wattenwyl, 1893: 208; Perkins, 1899: 15; Kirby, 1906: 79; Zimmerman, 1948: 125; Chopard, 1968: 324; Chopard, 1969: 284; Otte, 1994: 42; Yin & Liu, 1995: 187; He et al., 2017: 125; Lu et al., 2018: 175 –181 (gene tree of Paratrigonidium and related genera).

Trigonidium (Paratrigonidium) : Gorochov, 1987: 10; Storozhenko & Paik, 2007: 111; Gorochov et al., 2018: 317.

Type species: Paratrigonidium nitidum Brunner von Wattenwyl, 1893

There are currently 15 species: 4 described from Java, 4 from Indochina, 2 from India / Nepal, 1 from southern China, 3 from Taiwan, and 1 from western Africa. Paratrigonidium is considered a distinct genus in most literature, except Gorochov (1987) and Storozhenko & Paik (2007). Gorochov (1987) argued Paratrigonidium and Trigonidium s. str. should be under the same genus owing to the similarities in male genitalia. The stridulatory apparatus is fully developed in this genus, and for the ability to sing, He et al. (2017) considered them as a separate genus from the non-singing Trigonidium . Lu et al. (2018) reconstructed a gene tree of Paratrigonidium and related genera. However, they used Trigonidium cicindeloides as the outgroup, which did not allow the testing of the relatedness of Paratrigonidium and Trigonidium s. str. To do so, we reran the analyses using data available in GenBank (see Part II).