Apogon soloriens , a new species of cardinalfish (Perciformes: Apogonidae) from the Bonin Islands, Japan
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Apogon soloriens, a new species of cardinalfish (Perciformes: Apogonidae) from the Bonin Islands, Japan Tomohiro Yoshida1 · Hiroyuki Motomura2 Received: 3 September 2019 / Revised: 6 April 2020 / Accepted: 8 April 2020 © The Ichthyological Society of Japan 2020
Abstract The new cardinalfish Apogon soloriens is described on the basis of nine specimens collected from the Bonin Islands (northern island chain of Ogasawara Islands), Japan. The new species resembles Apogon caudicinctus Randall and Smith 1988 in coloration, lacking a black band below the second dorsal fin but with a black band on the caudal peduncle, but differs in having 13 pectoral-fin rays (vs. 12 rays in A. caudicinctus), greater interorbital width [9.1–11.1% of standard length (mean 9.8%) vs. 6.6–7.9% (7.3%)], and a wider blackish band on the caudal peduncle (vs. narrower black band). A key to the Apogon talboti look-alike group is provided. Keywords Apogon caudicinctus · Taxonomy · Morphology · Teleostei · Ogasawara islands
Introduction The apogonid genus Apogon Lacepède 1801 (Apogonidae) is characterized by II, 8 anal-fin rays, predorsal scales present, preopercular flap not extending beyond the vertical edge of the preopercle, and a pale stomach and intestine (Mabuchi et al. 2014). The genus includes several species complexes or groups: Apogon coccineus complex (defined by Greenfield 2001), Apogon erythrinus complex (Greenfield 2001), Apogon talboti group (Greenfield and Randall 2004), and Apogon talboti look-alike group (Greenfield and Randall 2004). This article was registered in the Official Registry of Zoological Nomenclature (ZooBank) as 17FEA0F6-6F33-4AD2-9CBA-A4096 8F03DD6. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. * Tomohiro Yoshida [email protected] Hiroyuki Motomura [email protected]‑u.ac.jp 1
Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency, 1551‑8 Taira‑machi, Nagasaki 851‑2213, Japan
The Kagoshima University Museum, 1‑21‑30 Korimoto, Kagoshima 890‑0065, Japan
2
The Ogasawara Islands consist of two major island chains (Bonin and Volcano islands) and three isolated small islands and have never been connected to the Asian Continent and the mainland of Japan. The Bonin Islands, northern island chain, are located about 1,000 km south of Tokyo (Kuriiwa 2018). During an ichthyofaunal survey in the Bonin Islands in 2015, nine unidentified specimens belonging to the A. talboti look-alike group, having two supraneural bones and a membranous flap at the lower corner and along the ventral margin of the preopercle, were collected from the Bonin Islands. Although similar to Apogon caudicinctus Randall and Smith 1988 of the group in color pattern and several other characters, the former differed in their greater number of pectoral-fin rays, greater interorbital width, and a wider blackish band on the caudal peduncle. They are described herein as a new species,
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