taxonID	type	description	language	source
FB00502EC6765603BC0D4C0AAA65D00D.taxon	description	English name: Japanese lanternfish New Chinese name: 日本背燈魚 Fig. 1; Tables 1, 2.	en	Su, Yo, Huang, Jian-Fu, Yang, Fan-Yi (2025): A southward range extension of the Japanese lanternfish, Notoscopelus japonicus (Actinopterygii, Myctophiformes, Myctophidae), from Taiwan, northwestern Pacific Ocean, with a checklist of myctophids from Taiwan. Acta Ichthyologica et Piscatoria 55: 123-131, DOI: 10.3897/aiep.55.151025
FB00502EC6765603BC0D4C0AAA65D00D.taxon	description	Description of Taiwanese specimens. Meristic and morphometric data are provided in Tables 1, 2. Dorsal-fin rays 20 – 21; pectoral-fin rays 11 (left) / 11 – 3 (right); pelvic-fin rays 9 / 9; anal-fin rays 18 – 20; principal caudal-fin rays 10 + 9, uppermost and lowermost rays unbranched; procurrent caudal-fin rays 10 – 11 and 11 on upper and lower lobes, respectively; gill rakers on outer face of first gill arch 8 + 1 + 16 = 25 (total); lateral-line scales 42 – 44 / 42 – 43; vertebrae 16 – 17 + 24 – 26 = 41 – 42. Body slender, depth at dorsal-fin origin 6.0 – 6.6 in SL; body slightly compressed and oval in trunk section, width 3.1 – 4.0 in HL. Head small, length 3.9 – 4.2 in SL; upper profile of head gently curved, nearly straight to dorsal-fin origin; eyes small, width 4.1 – 4.7 in HL; snout rounded and short, not extending before premaxilla, length 6.3 – 7.0 in HL; interorbital space convex, width 3.6 – 3.9 in HL; postorbital length 1.5 in HL. Mouth large, upper-jaw length 1.4 in HL; posterior end of maxilla nearly reaching posterior margin of preopercle. Two nostrils situated at middle of snout, both slightly above horizontal through center of eye; posterior nostril slightly larger than anterior nostril. Symphysis of premaxillae notched and naked. Symphysis of dentaries without knob and naked. Supramaxilla single, small and rounded; situated above posterior portion of maxilla. Premaxilla and dentary covered with villiform teeth on lateral and medial surfaces. Palatine with narrow band of teeth; vomer naked; endopterygoid with villiform teeth. Body scales deciduous, scales on body ctenoid (based on remaining scales). Isthmus with scales. Gill rakers rod-shaped and laterally compressed; its lateral and mesial surfaces covered with small conical teeth; rakers on outer row of first arch longer than rest. Short rakers, some forming bumps present on inner face of outer three arches. Fifth ceratobranchial with small conical teeth. Second pharyngeal arch with elongated villiform tooth patch. Third pharyngeal arch with elongated tear-drop shaped conical tooth patch. Fourth pharyngeal arch with rounded conical tooth patch. Dorsal-fin base 3.7 – 3.8 in SL; its origin anterior to pelvic-fin origin and its end posterior to anal-fin origin; last two rays elongated. Pectoral fin elongated, its length 2.4 – 2.6 in HL, nearly reaching pelvic-fin origin when adpressed. Pelvic fin situated posteriorly, at midline of pectoral- and anal-fin origins. Anal-fin base 4.7 – 5.2 in SL. Adipose fin small, its origin above end of anal-fin base; last two rays elongated. Caudal fin forked, length 1.2 in HL. Caudal peduncle rather long, its height 2.9 – 3.3 in HL; its length 0.9 – 1.0 in HL.	en	Su, Yo, Huang, Jian-Fu, Yang, Fan-Yi (2025): A southward range extension of the Japanese lanternfish, Notoscopelus japonicus (Actinopterygii, Myctophiformes, Myctophidae), from Taiwan, northwestern Pacific Ocean, with a checklist of myctophids from Taiwan. Acta Ichthyologica et Piscatoria 55: 123-131, DOI: 10.3897/aiep.55.151025
FB00502EC6765603BC0D4C0AAA65D00D.taxon	distribution	Distribution. Previously known from temperate waters in the northern Pacific Ocean, including Russia (Sheiko and Fedorov 2000; Parin et al. 2014; Balushkin and Prirodina 2020), Korea (Park et al. 2019), Japan (Bekker 1967; Fujii and Uyeno 1976; Fujii 1984; Shinohara et al. 1996, 2001, 2005, 2014; Balanov et al. 2009; Nakagawa and Motomura 2020), Hancock Seamount, Hawaii (Mundy 2005), Canada (Peden and Hughes 1986; McAllister 1990), and Alaska (Love et al. 2021). A mesopelagic species that inhabits below 300 m during the daytime and migrated to 20 – 200 m depth at night (Watanabe et al. 1999). Our specimens represent the southernmost record of this species.	en	Su, Yo, Huang, Jian-Fu, Yang, Fan-Yi (2025): A southward range extension of the Japanese lanternfish, Notoscopelus japonicus (Actinopterygii, Myctophiformes, Myctophidae), from Taiwan, northwestern Pacific Ocean, with a checklist of myctophids from Taiwan. Acta Ichthyologica et Piscatoria 55: 123-131, DOI: 10.3897/aiep.55.151025
