Batasio spilurus Ng 2006 was described from the vicinity of Dibrugarh, Assam (Brahmaputra River) and its distribution to tributaries of Brahmaputra River is unknown. Recent collections from Siang River at Pasighat, Arunachal Pradesh included this species, and hereby reported for the first time. With the record of this species, a total of five species of Batasio are known from the state. A key to the species of Batasio occurring in Arunachal Pradesh has also been provided.
Achom Darshan, Rashmi Dutta, Santoshkumar Abujam and Debangshu Narayan Das