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Two New Pomacanthid.Fishes of the Genus Centropyge from Oceania

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Two New Pomacanthid.Fishes of the Genus Centropyge from Oceania Japanese Journal of Ichthyology V 魚 類 学 雑 誌 ol.21,No.3.1974 21巻3号1974年 Two New Pomacanthid.Fishes of the Genus Centropyge from Oceania John E.Randall and Richard C.Wass Centropyge multicolor is described from the Marshall Islands and Tahiti.It is white dorsally on the body,becoming yellow on the caudal peduncle and fin;the lower head and thorax are yellow,shading through orange to brown on abdomen and lower posterior part of body;there are alternating bars of black and bright blue on the nape. C.aurantius is described from Samoa.It is distinctive in its deep body(depth about 1.7 in SL),pelvic fins which reach to soft portion of anal fin,fine serrations on preopercle and preorbital,and its predominately orange color with irregular dark bars. Introduction endemic.The related C.flavicauda was de- The pomacanthid genus Centropyge is a scribed from the Macclesfield Bank,China close-knit assemblage of small,usually colorful, Sea;the senior author has also taken it in tropical reef fishes which are popular in the the Solomon Islands,Society Islands,and aquarium trade.The number of species has Tuamotu Archipelago,Bruce Carlson at.Fiji, nearly doubled since the revision of the angel- and Gerald R.Allen at New Guinea and the fishes by Fraser-Brunner(1933).He recog- Palau Islands(specimens at Bishop Museum). nized 11 species of Centropyge,though erred. With the description herein of C.multicolor in placing C.loriculus(Gunther)and C.pot- from the Marshall Islands and C.aurantius from teri(Jordan and Metz)in the synonymy of American Samoa,the total number of valid C.bispinosus(Gunther).Also he overlooked Indo-Pacific species of Centropyge is raised to C.interruptus(Tanaka)from Japan which. 22.At least three additional species remain Tanaka(1931)erroneously placed in the syn- to be described,one from Ceylon and two onymy of C.fisheri(Snyder)(C.interruptus from the Cocos-Keeling Islands,Indian Ocean. resurrected by Tominaga and Yasuda,1973). The latter were collected by William F. The number of species of Centropyge remained Smith-Vaniz and associates and will be de- constant at 14 until 1951 when Woods and scribed by Smith-Vaniz and Randall. Kanazawa described C.argi from Bermuda. Randall and Caldwell(1973)stated that Schultz and Woods in Schultz et al.(1953) Holacanthus multifasciatus Smith and Radcliffe, added two species from the tropical Pacific which Fraser-Brunner(1933)and others have to the genus:C.heraldi and C.nigriocellus placed in Centropyge,warrants a genus by (their C.flammeus is a synonym of C.lori- itself.It seemed distinctive in its deep body culus).Klausewitz(1963)named C.eibli from (depth 1.52 to 1.75 in SL),steep head profile, the Nicobar Islands.Randall and Burgess and a dorsal fin formula of XIII,18.How- (in Burgess and Axelrod,1972)described C. ever,the discovery of C.aurantius with a ferrugatus from the Ryukyu Islands,and similar deep body(depth 1.63 to 1.75 in SL) Randall and Caldwell(1973)added C.hotu- and steep head profile but with XIV dorsal matua from SE Oceania.In the same year spines,tends to rule out the erection of a Shen described C.caudoxanthorus from Tai- new genus for C.multifasciatus. wan;however this may only be a color We follow Fraser-Brunner(1933)in his variant of C.flavicauda Fraser-Brunner-the classification of Centropyge as a genus,although same as the specimens from Taiwan he identi- the distinction from Holacanthus is admittedly fied as C.fisheri.The latter is a Hawaiian slight.Some authors such as Herre(1953) ―137― 魚 類 学 雑 誌Japan.J.Ichthyol.21(3),1974 have preferred to treat Centropyge as a sub- mm SL,Tahiti,Society Islands,District of genus of Holacanthus. Paea,vertical drop-off in 53.5 m,dip nets, When the last two dorsal or anal fin rays Clemens Classen,January 17,1974. share the same pterygiophore,they were Diagnosis—Dorsal rays XIV,16-17;anal counted as one ray.Pectoral-ray counts in- rays 111,17;pectoral rays 16 19;gill rakers clude the rudimentary upper ray.Lateral- 6•`7+16;depth of body 1.92 in standard. line scale counts were made only of the dorsal length;caudal fin rounded;first 5 or 6 inter- series which ends beneath the soft portion of spinous membranes of dorsal fin incised one- the dorsal fin.Counts of scales,the small fourth or more length of spines;posterior spines on margins of cheek bones,and gill margin of dorsal and anal fins rounded,the rakers were made on the left side.Upper- rays not extending posterior to mid-length of limb gill-raker counts are listed first;the caudal fin;cirrus at upper end of each inter- raker at the angle is included in the lower- spinous membrane small,not extending above limb count. spine tips;no enlarged spines on preorbital; Body depth was measured from the lowest upper half of body white in life;lower head point of the abdomen to the extreme base of and thorax yellow,shading through orange the dorsal spine vertically above it.Head to brown on abdomen and lower posterior length was taken from the median edge of part of body;nape with alternating bars of the upper lip to the posterior end of the black and bright blue. opercular membrane.Length of the caudal Description—Dorsal rays XIV,16(one para- peduncle was measured diagonally from the type with 17);anal rays 111,17;pectoral rays mid-base of the caudal fin to the rear base 16(17 on right side)(3 paratypes with 17, of the anal fin.Dorsal and anal spine and one with 16), the upper 2 and lowermost soft-ray measurements were made to the ex- unbranched; pelvic rays 1,5; principal caudal treme bases of these elements(aided by trans- rays 17 (upper and lowermost unbranched); mission of a bright light through the tissues). tubed lateral-line scales 37(35-37);near- In the descriptions of the two new species, vertical scale rows from upper end of gill data in parentheses apply to paratypes. opening to mid-base of caudal fin 45(44-46); Type specimens have been deposited at the scales above lateral line to origin of dorsal Bernice P. Bishop Museum(BPBM),British. fin 7;scales below lateral line to origin of Museum(Natural History)[BM(NH)],Cali- anal fin 20(18-19);circumpeduncular scales fornia Academy of Sciences(CAS),and the 20;gill rakers 6+16(6•`7+16);branchios- U.S.National Museum of Natural History tegal rays 6;vertebrae 10+14. (USNM). Body moderately deep,the depth 1.9(1.9•` 2)in standard length,and compressed,the Centropyge multicolor,sp.nov. width 2.85(2.74•`2.94)in depth;head length Fig.1 3.37(3.35•`3.5)in standard length;dorsal Holotype•\BPBM 10058,45.8 mm SL,Ene- profile of forehead about 42•‹;snout 3.16 wetak Atoll(formerly Eniwetok),Marshall (3.13•`3.37)in head;eye 2.57(2.38•`2.57)in Islands,Rigili(Leroy)Islet,off ocean reef on head;interorbital space slightly convex,the near-vertical slope,30 m,quinaldine,G.R. bony width 3.68(3.6•`3.76)in head;caudal Allen and R.H.Snider,July 29,1970. peduncle deeper than long,the least depth Paratypes—BPBM 9664,49.1 mm SL,Ma- 2.09(2.14•`2.35)in head. juro Atoll,Marshall Islands,ocean reef off Mouth small,terminal,the gape horizontal; Laura Islet(SW corner of atoll),upper edge maxillary just reaching a vertical at posterior of steep drop-off,20 m,spear,J.E.Randall nostril.Lips nearly equal in width,the and A.R.Emery,April 1,1970;BM(NH) median height of upper lip about one-third 1947.7.3.1,43.2 mm SL,same data as pre- eye diameter.Teeth slender,elongate,close- ceding;CAS 30690,43.0 mm SL,same data set,flexible in jaws,tricuspid(central cusp as preceding;USNM 212152,42.1 mm SL, notably longer than each laternal one),in 3 same data as preceding;BPBM 17243,62.9 rows at front of jaws,the uppers numbering •\138•\ Randall and Wass:Two New Pomacanthid Fishes about 55 in outer row and the lowers about ventral margin of preorbital with 5(4•`6) 50.No teeth on roof of mouth.Tongue small spines,this margin free for about half short and broadly rounded. the distance from lowermost point to eye; Posterior nostril about twice as large as an- antero-ventral margin of preorbital with a terior,the opening elliptical;anterior nostril shallow emargination. with a membraneous rim which is elevated Scales coarsely ctenoid(up to about 30 into a flap postero-dorsally;nostrils separated ctenii on margins),the exposed portion strong- by a space about equal to diameter of an- ly ridged;head and body completely scaled terior nostril.Gill membranes narrowly at- except for lips and a narrow zone from eye tached to isthmus.Longest gill filament on to upper jaw containing nostrils;dorsal and first arch about 2.4 in eye.Longest gill anal fins scaled nearly to margins except raker about 4.6 in eye. region of anterior spines where fin is deeply A prominent large spine at corner of pre- incised;caudal fin scaled on about basal two- opercle;a single spine on lower margin of thirds of fin;pectoral fins scaled basally; preopercle(its length about equal to width of pelvic fins with row of scales extending about base of corner spine),and 24(13-26)small half-way out on rays,none on membranes.
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