Species that contain: Pygosteus and undecimalis [ 1 ] records

undecimalis, Pygosteus Jordan [D. S.] & Starks [E. C.] 1902:62, Fig. 1 [Proceedings of the United States National Museum v. 26 (no. 1308); ref. 2525] Chitose, Hokkaido, Japan. Holotype: CAS-SU 7119. Paratypes: CAS-SU 7153 (5). Type catalog: Böhlke 1953:59 [ref. 12291]. •Synonym of Pungitius pungitius (Linnaeus 1758), subspecies tymensis (Nikolskii 1889) -- (Okada 1961:619 [ref. 6363], Monod 1973:285 [ref. 7193], Keivany & Nelson 2000:119 [ref. 24720]). •Synonym of Pungitius tymensis (Nikolskii 1889) -- (Berg 1949:968 [ref. 20662], Dyldin & Orlov 2017:58 [ref. 35138]). Current status: Synonym of Pungitius tymensis (Nikolskii 1889). Gasterosteidae. Habitat: freshwater.