Bivalvia | ... | Unionidae | Unioninae | Unionini | Oxynaiina | Nodularia douglasiae
Nodularia douglasiae (Griffith & Pidgeon, 1833), Asia, Hong Basin (Red Basin)/Đà R. (Black R./Lixian R.-China) Vietnam, Tây Bắc (Northwest), Dien Bien Co. [Song Da Tributary], 3 kilometers upstream of Muong Lay where river is unimpounded, [3.45 air miles SSW center Muong Lay]. 22.00044°N, 103.1542° E
