Synonymy of a rare stichaeid fish, Eulophias tanneri Smith 1902, and its redescription (Teleostei: Cottiformes)

Although the genus Eulophias Smith 1902 has been considered to include two valid species, Eulophias tanneri Smith 1902 and Eulophias owashii Okada and Suzuki 1954, it was revealed that the latter is a junior synonym of the former after detail comparison of the holotypes and the original descriptions of both species. A new specimen of the genus collected from off Ibaraki Prefecture, Pacific coast of Japan, was also identified as E. tanneri. Because morphological characters of E. tanneri have been poorly known, the species is redescribed in detail, mainly based on the newly collected specimen.