Japanese Journal of 魚 類 学 雑 誌 Vol.34, No.4 1988 34巻4号1988年

First Record of the Labrid teeth, progressively shorter posteriorly; a large richmondi canine tooth posteriorly on upper jaw at corner from Japan of mouth. Nostrils small, close-set in front of eye; the anterior shortly tubulated; the posterior with a prolonged flap anteriorly. Margins of Mitsuhiko Sano opercular bones entire. Gill membranes broadly attached to isthmus. (Received June 26, 1987) Origin of above posterior tip of opercular margin; the spines gradually increasing

The was originally in length posteriorly; soft dorsal fin pointed pos-

described and figured by Fowler and Bean (1928) teriorly; the 11th ray longest. Origin of anal fin

on the basis of three specimens from the Philip- opposite base of 1st dorsal soft ray; the 1st spine

pines and Celebes. Since then no additional spec- slender and short; the 3rd spine longest; the 11th imens had been reported until Randall (1986) ray longest, subequal to the longest dorsal ray.

recorded the species from Java, Ambon (eastern Pectoral fin rounded, reaching below base of 8th ), Truk, Ponape, and Kwajalein (Marshall dorsal spine. Pelvic fin long, reaching anal fin

Islands) and presented the diagnosis.

During an ecological field survey of coral reef Table 1. Counts and proportional measure- at Iriomote Island, one of the Ryukyu ments of Halichoeres richmondi from Iri- Islands of Japan, in 1986, I collected a male spec- omote Island, Japan.

imen which provides the first record of H. rich-

mondi from the Japanese Archipelago.

Methods for counts and measurements follow

Randall (1980) and Randall and Smith (1982).

Color description is from color photographs of

the fresh specimen.

Halichoeres richmondi Fowler et Bean, 1928

(New Japanese name: Goshiki-kyusen)

(Fig. 1)

Halichoeres richmondi Fowler and Bean, 1928: 263, pl.

24 (type locality: Inamucan Bay, Mindanao); Randall, 1986: 224, fig. 62.

Material examined. FUMT-P (Department of

Fisheries, University Museum, University of Tokyo) 10836, 96.5mm in standard length (SL), male, Amitori

Bay (24•‹20'N, 123•‹42'E), Iriomote Island, Ryukyu Islands, at a depth of 2m on a dead coral reef, Oct. 2,

1986.

Description. Counts and proportional measure-

ments are shown in Table 1.

Body moderately elongate, compressed. Snout

somewhat pointed, longer than interorbital space

which is convex. Mouth small, terminal, some-

what oblique; maxillary not reaching below

anterior nostril; lips fleshy, the lower with a

downward-projecting flap on the side. Front of jaws with a pair of large, recurved canine teeth followed by a second slightly recurved pair about

three-fourths as long; sides of jaws with conical

―504― Sano: Labrid Record from Japan

Fig. 1. Halichoeres richmondi from Iriomote Island , Japan, FUMT-P 10836, male, 96.5mm SL.

origin when depressed. Caudal fin rounded. included in my count. However, I was unable Body scales cycloid. Head naked except for to ascertain whether this is a correct assumption. small scales at nape. All fins scaleless except for To my request for reexamination of the gill-raker caudal fin, covered with scales near its base. counts for the type specimens deposited in the Lateral line completed, bending down abruptly U.S. National Museum of Natural History, Ray beneath base of 9th dorsal ray. Carthy informed me that counting is impossible Color in life: See Fig. 1. Body greenish yel- because the stiffening opercle would be damaged low except for breast which is brownish yellow; by distention. Randall (1986) described 23 to each row of scales with a narrow blue median 26 gill rakers in the diagnosis of this species, in- stripe, each scale with a brown center. Head dicating that the count for the present specimen is greenish yellow above and brownish yellow below; within its range. I thus identify the present spec- 7 narrow, longitudinal bright blue stripes on imen as H. richmondi. head side (one through lower edge of eye bifurcat- The present specimen occurred solitarily on a ing on opercle), a similar stripe on mid-dorsal part shallow inner coral reef consisting mainly of dead of head; lips and lower part of gill membrane staghorn coral Acropora spp. at Amitori Bay, bright blue. Dorsal and anal fins brown, with where hermatypic corals were intensely infested narrow translucent margins; each fin with about with the coral-feeding starfish Acanthaster planci 2 narrow, longitudinal blue lines, partly broken between 1981 and 1982 (see Sano et al., 1987). and dotted. Caudal fin brown, with narrow, During the field survey I did not see any other longitudinal blue lines and with translucent individual of H. richmondi at the bay and adjacent margin. Paired fins yellow basally. areas. Color in alcohol: Body pale green, with nar- row, longitudinal dark stripes. Head and breast Acknowledgments dark; longitudinal stripes on head obscure. Verti- cal fins dark, with translucent margins. Paired I wish to express my thanks to Hiroyuki Yoko- fins pale green basally. chi, Akihiro Ishimaru, Hiroyoshi Kohno, Hideo Remarks. Most characters of the present spec- Sunagawa, and the Okinawa Regional Research imen agree well with the original description and Center, Tokai University, for assisting in the col- figure of Halichoeres richmondi except for the gill- lection of the specimen. I am grateful to Ray raker count: the present specimen has 24 instead Carthy for giving information on the type spec- of 15 gill rakers. I presumed that this apparent imens. Jack T. Moyer reviewed the manuscript discrepancy in the count arises from different and provided helpful suggestions. Keiichi Matsu- methods of counting, because all rudiments are ura, John W. Shepard, Yusuke Suda, and Masa-

•\ 505•\ 魚類学雑誌 Japan. J. Ichthyol. 34 (4), 1988 hiro Aizawa generously offered advice. This Ichthyol. Bull. J.L.B. Smith Inst. Ichthyol., (45): study was made possible by a Grant-in-Aid for 1-26, pls. 1-8. Scientific Research from the Japan Ministry of Sano, M., M. Shimizu and Y. Nose. 1987. Long- term effects of destruction of hermatypic corals by Education, Science and Culture (No.61760155). Acanthaster planci infestation on reef fish com- munities at Iriomote Island, Japan. Mar. Ecol. Literature cited Prog. Ser., 37 (2/3): 191-199.

Fowler, H.W. and B.A. Bean. 1928. Contributions (Department of Fisheries, Faculty of Agriculture, to the biology of the Philippine Archipelago and University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo adjacent regions: the fishes of the families Poma- 113, Japan) centridae, Labridae, and Callyodontidae, collected by the United States Bureau of Fisheries steamer "Albatross 日 本 初 記 録 の ベ ラ 科 魚 類 ゴ シ キ キ ュ ウ セ ン(新 称) ," chiefly in Philippine Seas and adjacent waters. U.S. Natn. Mus., Bull. 100, Vol.7, viii+ 佐 野 光 彦 525pp., 49 pls. 西 表 島 網 取 湾 の 水 深 約2mの 死 滅 枝 状 サ ン ゴ 礁 か ら Randall, J.E. 1980. Two new Indo-Pacific labrid ベ ラ 科 魚 類 の 一 種,ゴ シ キ キ ュ ウ セ ン(新 称)Hali- fishes of the Halichoeres, with notes on other ckoeres richmondiの 雄 を1個 体 採 集 し た.本 種 の 雄 の species of the genus. Pacif. Sci., 34 (4): 415-432. 主 な 特 徴 は,細 い 青 色 縦 線 を 頭 側 に 約7本,体 側 に 約 Randall, J.E. 1986. 106 new records of fishes from 12本 持 つ こ と で あ る.本 種 は フ ィ リ ピ ン,セ レ ベ ス, the Marshall Islands. Bull. Mar. Sci., 38 (1): 170- ジ ャ ワ,ア ンボ ン(東 イ ン ドネ シ ア),ト ラ ッ ク,ポ ナ 252. ペ,ク ワ ジ ャ リ ン(マ ー シ ャ ル 諸 島)か ら報 告 さ れ て い Randall, J.E. and M.M. Smith. 1982. A review of the た が,目 本 か ら は ま だ 知 ら れ て い な か っ た. labrid fishes of the genus Halichoeres of the western Indian Ocean, with descriptions of six new species. (113文 京 区 弥 生1-1-1東 京 大 学 農 学 部 水 産 学 科)

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