longipinnis, Rhinogobius Nguyen [V. H.] & Vo [V. B.] in Nguyen 2005:636, Fig. 6 [Freshwater fishes of Vietnam v. 3; ref. 29809] Nui Coc Lake, Dai Tu District, Thai Nguyen Province, Vietnam. Holotype: NCNTTS I Inst., Bac Ninh. Paratypes: (7). •Inquirenda as Rhinogobius longipinnis Nguyen & Vo 2005 -- (Kottelat 2013:424 [ref. 32989]). •Valid as Rhinogobius longipinnis Nguyen & Vo 2005 -- (Takahashi & Okazaki 2017:[3] [ref. 35171]). •Synonym of Rhinogobius similis Gill 1859 -- (Suzuki et al. 2015:[4] [ref. 33993] with question, Suzuki et al. 2017:83 [ref. 35202]). Current status: Synonym of Rhinogobius similis Gill 1859. Gobiidae: Gobionellinae. Distribution: Lo River drainage at Tuyen Quang City and rivers from Lake Nui Coc, Dai Tu, Thai Nguyen Province, Vietnam (if valid). Habitat: freshwater.