First specimen-based Northern Hemisphere records of Egglestonichthys rubidus (Gobiidae) from Iriomote Island, Yaeyama Islands, Ryukyu Archipelago, Japan

In July 2000 and October 2007, three male specimens (18.2–27.9 mm in standard length) of Egglestonichthys Miller and Wongrat, 1979 were collected from Amitori Bay, Iriomote Island, Yaeyama Islands, Ryukyu Archipelago, Japan, and subsequently identified as Egglestonichthys rubidus Allen et al., 2020 by having the following combination of characters: snout and caudal fin rounded; dorsal- and anal-fin bases relatively short; head, body, and fins generally reddish brown when fresh; dorsal-fin rays VI-I, 7; pectoral-fin rays 17–18; longitudinal scale series 28; predorsal scales 15, extending to middle of interorbital region; almost entire body covered with ctenoid scales; sensory canal pores absent; transverse papillae pattern on cheek. The species has previously been known only from the original description (based on two specimens collected from Sideia Island, Milne Bay Province, Papua New Guinea) and an underwater photograph taken from Iriomote Island, Japan. Therefore, the present specimens represent the first specimen-based records from the Northern Hemisphere for the species. A new standard Japanese name “Kokuto-haze” is proposed for the species.