Trechiama Phyletic

Karaoğlan, Beliz Bahar, Yekedüz, Emre, Yazgan, Satı Coşkun, Mocan, Eda Eylemer, Köksoy, Elif Berna, Yaşar, Hatime Arzu, Şenler, Filiz Çay, Utkan, Güngör, Demirkazık, Ahmet, Akbulut, Hakan & Ürün, Yüksel, 2022, Contribution to the Knowledge of the Rakantrechus Complex (Coleoptera, Carabidae, Trechini), with Description of a New Subgenus and a New Species of the Genus Nipponaphaenops S. Uéno, 1971 from Northwestern Shikoku, Western Japan, Bulletin of the National Museum of Nature and Science. Series A, Zoology (Zoology) 48 (3), pp. 119-138 : 121-122

Key to the Genera and the Genus Complex of the Trechiama Phyletic Series

1. Elytron each with three longitudinal series of discal setae (apart from preapical seta), which are in stria 2, 3, and 5; preapical setae of elytra in apical curve of stria 2; apical portions of elytral striae showing weak anastomosing tendency ................................................................... Trechiotes Jeannel

— Elytron each with at most two longitudinal series of discal setae (apart from preapical seta), which are in the area between interval 3 and stria 5, excepting individual aberrancy; elytral striae usually forming apical anastomosis.................................................................................................................2

2. The first four pores (humeral set) and pore 5 of the marginal umbilicate series of elytra close to or adjoining marginal gutter, distance between the pore 1 and the pore 4 usually divided into three subequal parts by the insertions of the pore 2 and 3.................................................................................3

— Pores 1, 3, 4 and 5 of the marginal umbilicate series of elytra more or less removed from marginal gutter dorsad, and pores 1–4 are usually unevenly arranged also in longitudinal direction; preapical setae of elytra always present.......................................................................... Rakantrechus Complex

3. Pronotum barrel-shaped, with sides hardly sinuate before hind angles, with both front and hind angles hardly produced; striae of elytra deep and coarsely punctate; elytral discal chaetotaxy (3–4, 2–3); preapical setae of elytra in apical anastomosis of striae 2 and 3 ..................... Accoella S. Uéno

— Pronotum usually cordate to subcordate, rarely subquadrate to subcampanulate, with sides usually sinuate before hind angles, with both front and hind angles produced in most cases; striae of elytra variable in depth, and usually less coarsely punctate than in the above entry; number of elytral discal setae variable from 0 to 5 in both inner and exterior series according to species; preapical setae of elytra either present (usually in apical anastomosis of striae 2 and 3) or absent ................................................................................................................................. Trechiama Jeannel