Acanthopagrus Chinshira, a New Sparid Fish (Perciformes: Sparidae) from the East Asia
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Bull. Natl. Mus. Nat. Sci., Ser. A, Suppl. 2, pp. 47–57, March 21, 2008 Acanthopagrus chinshira, a New Sparid Fish (Perciformes: Sparidae) from the East Asia Masayuki Kume* and Tetsuo Yoshino Department of Marine Sciences, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903–0213, Japan E-mail: [email protected] * Present address: EAC Co. Ltd., 3–34–17 Yafuso, Urasoe, Okinawa 901–2127, Japan Abstract A new sparid fish, Acanthopagrus chinshira, is described on the basis of specimens collected from Nakagusuku Bay and Haneji Inlet, Okinawa Island, the Ryukyu Islands, Japan. Al- though the present new species has been often misidentified as Acanthopagrus australis (Günther), morphological and genetic evidence showed that it is clearly different from the latter species. This species is distinguished from the other congeners by having the following combination of charac- ters: pale (yellow when fresh) pelvic and anal fins, dorsal-fin rays XI, 11, 4 1/2 scale rows between lateral line and base of middle dorsal spine, 6 rows of cheek scales; no diffuse black blotch at ori- gin of lateral line, and no black spot on upper base of pectoral fin. This species is currently known from Okinawa Island, Japan, northwest coast of Taiwan, and Hong Kong. Key words : Sparidae, new species, Acanthopagrus chinshira, East Asia, Okinawa Island. The sparid fishes of the genus Acanthopagrus name it simply as “scale rows above lateral line”, are coastal marine fishes that are important as which is the number of scale rows from the base food fishes in tropical and temperate waters of of fifth or sixth dorsal-fin spine downward and the Indo-West Pacific. Among the 3 species backward to the lateral line, excluding the lateral- found in the Ryukyu Islands, Japan, the Okina- line scale, but including the uppermost row of wan yellow-fin seabream has been identified as smaller scales expressed as 1/2. Internarial width conspecific with Acanthopagrus australis (Gun- is the least width between the anterior narial ther, 1859) (e.g., Akazaki, 1962, 1984) or treated openings. Standard length and head length are as a species of unknown taxonomic status (e.g., expressed as SL and HL, respectively. Institution- Akazaki, 1997; Hayashi, 2000). Recent study of al codes follow Eschmeyer (1998), with addition- allozyme electrophoretic analysis showed that the al institutional abbreviations as follows: Division Okinawan yellow-fin seabream is a distinct of Fisheries Science, University of Miyazaki, species (see Kume et al., submitted). Subsequent Japan (MUFS); Shanghai Fisheries University, morphological and taxonomical study revealed China (SFU). that the Okinawan yellow-fin seabream is an un- described species, as described below. Acanthopagrus chinshira sp. nov. (Japanese name: Okinawa-kichinu) Materials and Methods (Figs. 1–4) Counts and measurements follow Akazaki Acanthopagrus sivicolus (not of Akazaki): Masuda et al., (1962, 1984) and Hubbs and Lagler (1964) with 1975: 231, pl. 57-F (in part, Ryukyu Is., Japan). Mylio berda (not of Forsskal): Au, 1978: 628, fig. 1 minor modifications. For the count of transverse (northern shelf of South China Sea). series of scales between lateral line and median Acanthopagrus australis (not of Günther): Akazaki, 1984: spinous dorsal fin [Akazaki’s (1984) Trac], we 178, pl. 167-E (Okinawa I., Japan); Jean and Lee, 48 M. Kume and T. Yoshino 1992: 221, fig. 1 (Tanshui, northwest coast of Taiwan); Sep. 2000, collected by M. Kume; URM-P 40889, 113 Lee, 1993: 364, pl. 104-7 (Tanshui, northwest coast of mm SL, Haneji Inlet, Okinawa I., 3 Sep. 2000, collected Taiwan). by M. Kume; URM-P 40891, 102 mm SL, Awase Fish Acanthopagrus sp.: Akazaki, 1997: 353 (Sashiki, Naka- Market, Nakagusuku Bay, Okinawa I., 15 Sep. 2000, col- gusuku Bay, Okinawa I., Japan); Hayashi, 2000: 857, lected by M. Kume; URM-P 41060, male, 244 mm SL, 1567 (in part, Haneji Inlet, Okinawa I., Japan). Nakagusuku Hama Fish Market, Nakagusuku Bay, Oki- nawa I., 11 Jan. 2001, collected by M. Kume; URM-P Holotype. NSMT-P 73081 (ex URM-P 41079), male, 41061, male, 399 mm SL, Nakagusuku Hama Fish Mar- 204 mm SL, Nakagusuku Hama Fish Market, Naka- ket, Nakagusuku Bay, Okinawa I., 19 Jan. 2001, collected gusuku Bay, Okinawa I., 23 Jan. 2001, collected by M. by M. Kume; URM-P 41083, 59 mm SL, nearshore Kume. Awase, Nakagusuku Bay, Okinawa I., 4 July 2000, col- Paratypes (15 specimens, 102–399 mm SL, all from lected by M. Kume; URM-P 41141, male, 209 mm SL, Japan). FAKU 130713 (ex URM-P 41059), 106 mm Nakagusuku Hama Fish Market, Nakagusuku Bay, Oki- SL, nearshore Atsuta, Nakagusuku Bay, Okinawa I., 13 nawa I., 10 Feb. 2001, collected by M. Kume; URM-P Oct. 2000, collected by A. Hachimine; MUFS 23014 (ex 41144, female, 343 mm SL, Chinen Fish Market, Naka- URM-P 36915), 117 mm SL, Nago Fish Market, Okinawa gusuku Bay, Okinawa I., 16 Feb. 2001, collected by M. I., 11 Dec. 1996, collected by H. Yoshigou, H. Mochizuki, Kume. N. Takei, S. Mutoh; MUFS 23015 (ex URM-P 41157), Other materials (total 103 specimens). Okinawa Is- 112 mm SL, nearshore Atsuta, Nakagusuku Bay, Okinawa land, Japan (97 specimens): URM-P 3521–3525, 5 speci- I., 1 Aug. 1997, collected by M. Tanaka; NSMT-P 63507 mens, 132–149 mm SL, Haneji Inlet; URM-P 4875, 290 (ex URM-P 40969), 187 mm SL, Awase Fish Market, mm SL, Naha Fish Market; URM-P 23539, 165 mm SL, Nakagusuku Bay, Okinawa I., 13 Oct. 2000, collected by Haneji Inlet; URM-P 23541–23553, 13 specimens, M. Kume; URM-P 23780, 232 mm SL, off Awase, Naka- 223–297 mm SL, Chinen Fish Market, Nakagusuku Bay; gusuku Bay, Okinawa I., 21 Feb. 1984, donated from Oki- URM-P 23780, 232 mm SL, off Awase, Nakagusuku Bay; nawa Fisheries Experimental Station; URM-P 41058, URM-P 32553, 185 mm SL, nearshore Awase, Naka- 105.4 mm SL, nearshore Atsuta, Nakagusuku Bay, Oki- gusuku Bay; URM-P 32556 (skeletonized), about 400 mm nawa I., 13 Oct. 2000, collected by A. Hachimine; URM- SL, Haneji Inlet; URM-P 36915, 117 mm SL, Nago Fish P 40887, male, 131.1 mm SL, Atsuta, Nakagusuku Bay, Market; URM-P 40886, 186 mm SL, Awase Fish Market, Okinawa I., 29 June 2000, collected by A. Hachimine; Nakagusuku Bay; URM-P 40890, 90 mm SL, Hama, Nak- URM-P 40888, 112 mm SL, Haneji Inlet, Okinawa I., 2 agusuku Bay; URM-P 40969–40970, 2 specimens, Fig. 1. Acanthopagrus chinshira sp. nov., URM-P 41079 (holotype), 204mm SL, Nakagusuku Bay, Okinawa I., Japan. New Sparid Fish from East Asia 49 177–187 mm SL, Awase Fish Market, Nakagusuku Bay; small anteriorly, becoming gradually larger pos- URM-P 40988–40989, 41058–41059, 4 specimens, teriorly (Fig. 3). Ventral edge of infraorbitals 77–106 mm SL, nearshore Awase, Nakagusuku Bay; above posterior part of upper jaw almost straight URM-P 41080–41082, 41084–41099, 41102–41138, 55 specimens, 36–69 mm SL, nearshore Awase, Nakagusuku without concavity. Nostrils separate; anterior Bay; URM-P 41139–41140, 2 specimens, 294–305 mm nostril circular with a flap on upper rim, posterior SL, Chinen Fish Market, Nakagusuku Bay; URM-P nostril elongate, slit-like. Gill opening wide; pos- 41145–41147, 3 specimens, 72–83 mm SL, nearshore At- terior end of operculum bluntly pointed. Scales suta, Nakagusuku Bay; URM-P 41148–41149, 2 speci- moderately large, circular and weakly ctenoid; mens, 64–168 mm SL, Hama, Nakagusuku Bay; URM-P interorbital space rather wide, naked; anterior- 41150–41157, 8 specimens, 94–161 mm SL, nearshore Atsuta, Nakagusuku Bay; URM-P 41178, 169 mm SL, most head scales rounded without small scales Nakagusuku Hama Fish Market, Nakagusuku Bay. Hong anteriorly. Snout and infraorbitals naked. Cheek Kong (6 specimens): FAKU 69111–69115, 5 specimens, with 6 rows of scales reduced dorsally to 3 rows 362–406 mm SL; MUFS 10573, 247 mm SL. at postorbital region. Lateral line complete, curved parallel to dorsal body profile and straight Diagnosis. A species of Acanthopagrus with on caudal peduncle. Scaly sheath developed on following combination of characters: pelvic and bases of soft dorsal and anal fins. Origin of dor- anal fins pale (yellow in fresh); dorsal fin XI, 11; sal fin slightly posterior to pectoral-fin base; pored lateral-line scales 46–49 (usually 47 or fourth dorsal-fin spine longest, 5.3 (5.3–6.9) in 48); scale rows above lateral line 4 1/2; cheek SL. Pectoral fin elongate and pointed; length 2.3 with 6 rows of scales; lower edge of infraorbitals (2.4–2.7) in SL, fifth ray longest. Pelvic-fin inser- straight; no prominent black spot on upper end of tion posterior to pectoral-fin axilla, length of pectoral-fin base, and no diffuse black blotch at longest ray 4.0 (3.9–4.5) in SL. Anal-fin origin origin of lateral line. below or approximately below tip of pectoral fin; Description. Proportional measurements of anal-fin base 5.2 (5.1–6.2) in SL; second spine the holotype, paratypes, and non-type specimens stoutest and longest, length 4.5 (4.3–5.7) in SL, are shown in Table 1. Data for the holotype are 1.4 (1.2–1.7) in HL; third spine shorter than first presented first, followed by paratype data in soft ray. Caudal fin forked with pointed lobes; parentheses. Dorsal-fin rays XI, 11 (XI, 11); upper lobe subequal to or slightly longer than anal-fin rays III, 8 (III, 8); pectoral-fin rays 15 HL, lower lobe subequal to or slightly shorter (15); pelvic-fin rays I, 5 (I, 5); pored lateral-line than HL.