Tongchuania mingiana H. Chen, H. - Q. Xiang, Y. - M. He, X. - C. Huang & X. - P. Wu 2025, gen. et sp. nov.

Tongchuania mingiana H. Chen, H.-Q. Xiang, Y.-M. He, X.-C Huang & X.-P. Wu, gen. et sp. nov. Material examined. Holotype: NCUTM 250511, shell length 54.27 mm, shell width 19.23 mm, shell height 28.97 mm (Fig. 4 A), Bahe River, Dazhou City, Sichuan Province, China, 31.0978°N, 107.1856°E, in April 2025. Paratypes: 5 specimens, NCUTM 250512 –16, shell length 51.02–79.08 mm, shell width 18.34–27.33 mm, shell height 29.03–41.22 mm (Fig. 4 B, C), locality and habitat same as holotype. Diagnosis. Same as the genus. Description. Same as the genus. Etymology. The specific epithet “ mingiana ” refers to the highly distinctive yellow-green band on the shell (a diagnostic character clearly distinguishing this species from other genus in the tribe Unionini), derived from the Chinese “ mingiana ” (bright mirror), alluding to the vivid band’s mirror-like contrast against the darker shell background. Vernacular name. 明鉴通川蚌 (ming jian tong chuan bang) (Chinese); Brightband Tongchuan mussel (English). Habitat and distribution. The species is currently only found in the slower-flowing sections of the Bahe River in Dazhou City, Sichuan Province. It lives in crevices between stones on gravel riverbeds at a depth of 0.5 to 1 meter (Fig. 1 B).