Genus: Tongnanlong WEI, TAN, JIANG, DING, LI, WANG, LIU, WEI, LI, LIU, PENG, ZHANG & LAO, 2025
Etymology: In reference to Tongnan, Chinese Pinyin, the Tongnan District, where the holotype was discovered and Chinese, long, "dragon."

Species: zhimingi WEI, TAN, JIANG, DING, LI, WANG, LIU, WEI, LI, LIU, PENG, ZHANG & LAO, 2025 (Type)
Etymology: In honor of world-famous dinosaur scientist Mr. Dong Zhiming for his great contributions to the dinosaur research in the Sichuan Basin.

Holotype: TNM 0254

Locality: The buildind site of Dafo Street, N30°10'44", E105°48'17", Tongnan District, Sichuan Basin, China.

Horizon: Suining Formation.

Biostratigraphy:

Age: Late Jurassic.

Material: 3 dorsal, 6 caudal vertebrae, left scapula and coracoid, partial tibia, fibula, 3 metatarsals and 2 unguals.