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NHBSS 054 2P Roberts Twos NOTES NOTES 299 Two Southeast Asian Species of the Cyprinid Fish Genus Genus Labeo ， L. erythropterus and L. pierrei Tyson Tyson R. Roberti ABSTRACT distinctive Two distinctive Southeast Asian cyprinid fish species of the genus La beo been have lumped lumped as La beo erythropterus. Labeo erythropterus Valenciennes 1842 ，described from Java ， also also occurs in Sumatra. La beo pierrei (Sauvage 1880) ，is known definitely only from the Mekong Mekong basin. The two species differ in morphology and coloration. The status of tb 巴 nominal Osteochilus t似 a Osteochilus ochrus Fowler 1935 飢 d Labeo cheveyi Fowler 1937 ，described from the Chao Chao Phraya basin and recently placed as junior synonyms of L. eηthropterus (RAINBOTH ， 1996) ，is uncertain. They might be junior synonyms of L. pie /"l ・ei. INTRODUC 百 ON Many species of the large Old World cyprinid subfarnily Labeoninae currently are assigned assigned to 由e genus Labeo. Labeoninae and Labeo are numerous in Africa ，including the Nile Nile and Congo basins ， as well as in India Asia. has numerous species but Southeast Asia only only a few. Two of these ，Labeo erythropterus and L. pierrei ， have been confused as one. Recent Recent works on fishes of the Mekong basin (e.g. RAINBOTH ， 1996) treat L. pierrei as a junior junior synonym of L. eηthropterus. Th e two sp 配 ies differ in morphology and coloration. Labeo erythropterus has a relatively shorter and smaller head ，more slender body ， and roughened roughened scales. La beo pierrei is rather variable in coloration ， and the sarne may be true of of L. eηthropterus ， but the latter species may have rosier fins and at least sometimes an overall overall white or silvery coloration not observed in L. pierrei ， while the latter has a distinctive pattem pattem of vertically elongate lozenge like marks based on the scales 出at might not occur in in the former. Roughening of the scales is unknown in L. pierrei. Labeo pierrei occurs in the Mekong basin and probably also in the Chao Phraya (op cit.) cit.) but not elsewhere. Labeo erythropterus ，described from Java ， also occurs in Sumatra but but not Bomeo or the Malay peninsula or anywhere else in mainland Asia. (Roberts ， 1993: 17; 17; confirmed by re 氾ent investigations). There is thus a substantial gap in the geographical ranges ranges of the two species. Institutional Institutional abbreviations used in this paper are RMNH (Rijksmuseum vor Natuurlijke Historie ，Leiden ， recently renamed Nationaal Naturhistorisch Museum); and ZMA ， Zoological Zoological Museum of the University of Amsterdam. IResearch IResearch Associate ，Smithsonian Tropical Research Institute Received Received accepted 29 September 2006. 300 NOTES Figure I. Labeo erythropterus. a, holotype, 516 mm , RM NH 22 77 , Bantam, Java , collected by Kuhl and van Hasse lt in 1820-1823 (from ROBERTS, 1993); b, 189-mm specimen from Sungai Musi near Tebintingi, Sumatra, 26 April 1999. N OTE S 301 Fi gllr e 2. La beo pi err ei. a，l ilh og r aph by D 巴lahaye of Ih e 111011nl ed ho lolype (f ro 111 SAUVAGE ，1 88 1. pl. 5); b， ca 80 C111 SL，M eko ng Ri ve r al san H ang Khone ，SO lllh e rn L aos (ph olo by allthor ); C. ca 80 C111 SL ，Nam Ng 1l 111 ne ar Na 111 Ng 1l 111 hyclropowe r projec l巴CI c1 am 剖 le3 ，ce nlr al La os (ph olo Jai Noi Siso1l1 pan ，Ma y 1 995) 302 NOTES Labeo erythropterus Valenciennes 1842 Figure Figure 1 Labeo erythropterus Valenciennes (ex Kuhl & van Hasselt) 泊 CUVIER & V ALENCIEN 阻 S 1842: 1842: 354. Type locality rivers of Bantam ， Java. Holotype RMNH D2277 (dry) Labeo erythropterus has a comparatively short or sm a1 1 head and falcate fin lobes. As indicated indicated by its name ， the fins of L. erythropterus are tinged with red. A 189-mm fresh specimen specimen from Sumatra has the distal p訂 t of the otherwise ra 由er dark dorsal and caudal fins fins with a distinctly red or rosy tinge. Th e otherwise whitish pelvic and anal fins are largely largely rosy or pinkish ， while the pectoral fin is faintly orange. Such red or rosy fin color is is absent in L. pierrei. Each sc a1 e of the lateralline scale row has a black spot. (F ig. 1b). Th e 516 ・mm holotype ，and also a 395-mm specimen from Java (ZMA 120.816) has the exposed exposed p釘 t of the scales very rough (presumably the reason for the Kuhl and van Hasselt unpublished unpublished manuscript n創 ne for this species of “La beo scabrosus" (ROBERTS ， 1993: 17). 官le cause of the roughe 凶ng is undetermined; it might be due to sm a1 1 keratinous multicellular tubercles. tubercles. Such roughened scales have not been observed in L. pierrei. This This species 叩parently is the only Labeo in Indonesia. It has no juni 町 synonyms. Only four specimens are known ，two collected in western Java by Kuhl 佃 d van Hasselt ， and two collected in Sumatra ， at Air Penatai ，Kurintji ， in 1915 (ZMA 120.816 ，395 mm) (ROBERTS ， 1993: 17) and the 189 ・mm specimen reported here co l1 ected in 1999 (Fig. (Fig. 1b). The synonymy provided for L. eη thropterus by RA 町 BOTH (1 996) does not relate to this this species. Labeo pie"ei (Sauvage 1880) Figure Figure 2 Lobocheilus Lobocheilus pierrii Sauvage ， 1880:233. Type locality rapids of Dang-nai ， Bien Hoa Pr ov. ， Indo-China. Indo-China. Holotype MNHN A-4451 (mounted) (Fig. 2a) ?Osteochilus ?Osteochilus ochrus Fowler ，1935:118 ，figs. 5ι57. Type locality Bangkok ， Thailand. Holotype Holotype ANSP 61781 ?La beo cheveyi Fowler ， 1937: 205 ，figs. 173-174. Type locality Me Poon R.， Chao Phraya basin ，Chiengmai ，Thailand. Holotype ANSP 68184 Th is species apparently is the only Labeo in the Mekong basin. It is unclear whether the the species is endemic to the Mekong or if it occurs elsewhere. The synonymy provided by Rainboth for L. erythropterus might relate to this species but more study on this is needed. needed. NOTES 303 REFERENCES CUVIER ，G. AND A. V ALENCIENNES. 1842. Historie Naturelle des Poissons ， 16: xx +4 72 pp; pls. 45 6-4 87. FOWLER ，H. W. 1935. Zo ologic 唱 1 results of 出e third De Schauensee Siamese Expedition ，P 副 V I. -Fishes ob 帥 led in 1934. Proc. Acad. Nat. Sci. Phila. v. 87: 89- 163. Fow 回 R，H. W. 1937. Zo ological 問 sults of 白出rd De Schauensee Siamese Expedition. P副 V Is， -Fishes obta 泊ed 泊 1936. Proc. Acad. Nat. Sci. Phila. v. 89: 125-264. RAINBO 四， W. J. 1996. Fishes of the Cambodian Mekong. FAO Species ldentification Field Guide for Fishery Purposes. Purposes. FAO ，Rome. ROBERTS ， T. R. 1993. 百 e freshwater fishes of Java ， as observed by Kuhl 釦 dv 釦 Hasselt in 1820 ー23. Zool. Verh. (Leiden) (Leiden) 285: 1-94. SAUVAGE ，H. E. 1880. Notice s町 quelques poissons de l'ile Campbell et de l' In do-Chine. Bull. Soc. Philomath. Paris Paris (Ser. 7) 4: 228-233. SAUVAGE ，H. E. 188 1. Recherches sur la faune ichthyologique de l'Asie et description d'especes nouvelles de l' In do-Chine. Nouv. Arch. Mus. Hist. Nat. Paris (Ser. 2) 4: 123-194 ，p1s. 5-8. .
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