First records of Galeus longirostris (Pentanchidae) from Yoron-jima island, Amami Islands, and a review of distributional records of Galeus sauteri in Japanese waters

Three specimens (549.2–652.0 mm total length) of the Longnose Sawtail Catshark Galeus longirostris Tachikawa and Taniuchi, 1987 (Pentanchidae), collected from Yoron-jima island, Amami Islands, Kagoshima Prefecture, Japan, were found in the fish collection of the Kagoshima University Museum; two of the three were erroneously reported as Galeus nippoensis Nakaya, 1975 by previous authors in 2014 and 2018. In Japanese waters, G. longirostris has been previously recorded from the Izu, Ogasawara and Okinawa islands, and Amami-oshima island. Thus, the three specimens, described here in detail, represent the first records of G. longirostris from Yoron-jima island. Comparison of G. longirostris with G. nippoensis in this study revealed that the two species may differ from each other by the length of the posterior margin of the dorsal head area where the ampullae of lorenzini are scattered (52.4–62.2% of horizontal diameter of eye in G. longirostris vs 38.0–49.5% in G. nippoensis). In addition, distributional records of Galeus sauteri (Jordan and Richardson, 1909) in Japanese waters were reviewed based on examinations of literature and voucher specimens.