Records of Saurida elongata, Saurida eso, and Saurida cf. undosquamis (Synodontidae) from northern Japan

Forty-two specimens [77.3–270.1 mm standard length (SL)] of Saurida elongata Temminck and Schlegel, 1846, six specimens (136.8–380.1 mm SL) of Saurida eso Jordan and Herre, 1907, and a single specimen (323.9 mm SL) of Saurida cf. undosquamis (Richardson, 1848) were collected from norhern Japan [S. elongata: Hokkaido, Aomori, and Ibaraki prefectures; S. eso: Hokkaido, Mutsu Bay (Aomori Prefecture), and Yamagata Prefecture; S. cf. undosquamis: Aomori Prefecture]. In Japanese waters, S. elongata, S. eso, and S. cf. undosquamis have previosly been recorded from southward of Akita and Fukushima prefectures, southward of Hokkaido, and southward of Aich Prefecture, respectively. The specimens of S. elongata represent the first records from the above-mentioned localities, the Hokkaido specimen of S. eso represents the reriable record from Hokkaido, and the Mutsu Bay and Yamagata Prefecture specimens of S. eso represent the first records from the areas, and the specimen of S. cf. undosquamis represents the first record from Aomori Prefecture. Incidentally, the Hokkaido specimens of S. elongata and S. eso, and the Aomori Prefecture specimen of S. cf. undosquamis are the northernmost record for each species (record of S. eso is on a par with Russian records from Peter the Great Bay).