奄美大島から得られた日本初記録のユカタハゼ属魚類モンロユカタハゼ（新称）

抄録

A single male specimen (24.7 mm standard length) of Hazeus profusus Allen and Erdmann, 2021 (Gobiidae), previously recorded from the Philippines, Indonesia, Papua New Guinea, and the Solomon Islands, was collected from Amami-oshima Island, Ryukyu Islands, Japan. The specimen, described here in detail, represents the first record from Japan as well as the northernmost record for the species. The present specimen possessed 10 dorsal-fin soft rays, 9 anal-fin soft rays, 17 pectoral-fin rays, 13 branched caudal-fin rays, 26 scale rows in the longitudinal series, 8 pre-dorsal-fin scale rows, fully scaled cheek and opercle, ctenoid scales covering on the body, nape, opercle, and posterior portion of cheek, cycloid scales covering on the pre-pelvic-fin region, the pectoral-fin base, and the most of cheek, the first spines of each dorsal fin robust, the second dorsal-fin spine not elongated, 2 longitudinal and 5 transverse rows of cephalic sensory papillae on the cheek, 5 large dark blotches on the mid-lateral body, the first dorsal fin without a large black blotch posteriorly, dark bands on the snout, cheek, and behind the eyes, and dark and white blotches on the upper and middle, respectively, of the pectoral-fin base. The specimen was collected alone at a depth of about 10 m on a steep sandy-muddy bottom slope extending from 5–30 m depth in the inner bay, Amami-oshima island. A new standard Japanese name “Monro-yukatahaze” is proposed herein for the species.