lonnbergi, Cottus quadricornis Lönnberg [E.] 1919:167, 171 [Fauna och Flora (Uppsala) v. 14 (no. 5); ref. 23061] Lake Mälaren, Sweden. Syntypes: ?NRM. Type catalog: Sideleva & Zhidkov 2021:240 [ref. 38705]. Name should not be changed since it is Swedish (see Koerber 2009:63 [ref. 30671] for spelling of Lönnberg and origin of his name). •Validates the infrasubspecific Myoxocephalus quadricornis morpha lonnbergi Berg 1916. •Synonym of Triglopsis quadricornis (Linnaeus 1758) -- (Kottelat 1997:170 [ref. 22952]). •Synonym of Myoxocephalus quadricornis (Linnaeus 1758) -- (Sideleva & Zhidkov 2021:240 [ref. 38705]). Current status: Synonym of Myoxocephalus quadricornis (Linnaeus 1758). Psychrolutidae: Myoxocephalinae. Habitat: freshwater, brackish, marine.