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Batang Merangin, immediately downstream of Danau Kerinci (June 1994).

Batang Merangin, immediately downstream of Danau Kerinci (June 1994).

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Fish surveys were conducted between 1994 and 2003 in the Batang Hari drainage, Sumatra. The fish fauna of the drainage now includes a total of 297 species of which 48 are new records (45 of them new records for Sumatra). Six new species are described in the families Cyprinidae (Crossocheilus obscurus, Osteochilus kerinciensis, Pectenocypris micromy...

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... in Central Sumatra in- clude the Musi, Batang Hari, Indragiri and Kam- par. All these rivers drain into the South China Sea. The Batang Hari (Fig. 1) is about 600 km from the headwaters of its longest tributary to the river mouth (Fig. 2). Its drainages covers most of Jambi Province and the southern part of the highlands of Sumatra Barat Province (Fig. 3). The remainder of Jambi Province is drained by a few smaller coastal drainages (which are included in the present review). The eastern and central por- tions of Jambi Province encompass much low- lying areas, originally made up of mainly tropical rainforests, oxbow lakes (Figs. 4-6), freshwater swamp forests (Figs. 7-9) and peat swamp ...
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... Our material agrees with Karnasuta's (1993: 31) and Roberts' (1989: 47) er, more rounded, and 3 tubercles at tip of snout (vs. 9 main tubercles). Specimens over 150 mm have the lower caudal-fin lobe shorter than the upper and rounded, which probably results from damages caused by the substrate (several rays show signs of regrowth) (Fig. ...
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... vittatoides Popta, 1904 (see also Popta, 1906: 94) (Fig. 33), originally described from the Mahakam and Kayan drainages in east- ern Borneo, has been treated as a synonym of O. enneaporos by Karnasuta (1993: 31) and Roberts (1989: 47) (our O. scapularis). Popta's original description largely disagrees on a number of points with our material of O. scapularis. Recent material from the Kayan agrees ...
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... 733) described O. waandersii on the basis of a single specimen 191 mm TL from Bangka, which he figured natural size in the Atlas (Bleeker, 1863-64: 63, pl. 110 fig. 2). Al- though there are slight differences, the specimens we identify as O. waandersii largely agree with Bleeker's holotype, figure and description. The holotype (BMNH 1866.5.2.169; Fig. 34a) has a pointed and less deep snout (vs. blunt in our fresh material; but the snout is less pointed in the ac- tual holotype than on Bleeker's figure); { 6 scales between the dorsal-fin origin and the lateral line (vs. { 5); the cheek appears less deep (not quan- tifiable, but compare Figures 34b-c). Although the head of our material ...
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... in our fresh material; but the snout is less pointed in the ac- tual holotype than on Bleeker's figure); { 6 scales between the dorsal-fin origin and the lateral line (vs. { 5); the cheek appears less deep (not quan- tifiable, but compare Figures 34b-c). Although the head of our material appears longer than the head of the holotype figured by Bleeker (23.0-25.8 ...
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... material from the Malay Peninsula earlier identified as O. waander- sii, O. microcephalus 'yellow fins' or O. enneaporos 'yellow fins' (e.g., Zakaria-Ismail, 1987;Ng & Tan, 1999). This materials is described elsewhere as O. flavicauda Kottelat & Tan, 2009. The specimen from Pattani (Thailand) illustrated as O. waander- sii by Karnasuta (1993: 30, fig. 13) apparently belongs to O. flavicauda, as does the fish figured by Smith (1945: 216, pl. 6) as O. vittatus. The ma- terial from the Mekong drainage identified as O. waandersii by Kottelat (1998: 45;2001: 66) should now be compared with the Sundaic mate- rial. Should it turn out to represents a distinct species, the name O. soplaoensis ...
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... slightly arched; ventral outline straight to slightly convave between head and anus, then slanted and straight to caudal-fin base. Mouth terminal, lower jaw slightly projecting. Gill rakers long, very thin, very densely set and difficult to count with accuracy. Counted in 4 specimens: ZRC 38675, 44.9 mm SL, about 70+170; ZRC 38675, 41.7 mm SL (Fig. 35c), about 67+160; ZRC 38675, 32.5 mm SL, about 55+150. In ZRC 38532, 25.4 mm SL, at least 45+120. Number of gill-rakers possibly increasing with SL. Dorsal fin with 2 simple and 6 or 7 branched rays; last ray short (not easily distinguishable), slender, not branched, not articulating on same pterygiophore as ray 6; origin above pelvic-fin ...
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... New record for Sumatra (see Fig. 36). Restricted to headwaters and foothill rivers. ...
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... This species is found at the foot of Gunung Tujuh and is the species of Rasbora found in the highest altitude in Sumatra (Fig. 37). As re-diagnosed in Kottelat et al. (1993: 48 [65], pl. 20), R. sumatrana is restricted to the fast flow- ing streams of the interior of Sumatra. It is re- corded only from the Batang Hari and Indragiri drainages. Even so, the identity of the various populations of R. sumatrana is not yet clear. We observe variability between ...
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... with the description of R. hosii Boulenger, 1895, but it disagrees in having the pectoral fin reaching the pelvic fin (vs. not) and 24-25 + 2 lateral line scales (vs. 28-29). We have examined photographs and radiographs of the syntypes of R. hosii (BMNH 1894.8.3.65-66). The 80.2 mm SL (BMNH 1894.8.3.65) syntype (here designated as lectotype; Fig. 38a) shares all the diagnostic char- acters of our Sarawak R. 'sumatrana', except for the colour marks, which are all faded or missing on the broken caudal fin. Some scales still have the distinct black posterior edge. The pectoral fin is broken but was probably not reaching the pelvic-fin base. There are 26+2 lateral line scales. The 86.3 ...
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... broken caudal fin. Some scales still have the distinct black posterior edge. The pectoral fin is broken but was probably not reaching the pelvic-fin base. There are 26+2 lateral line scales. The 86.3 mm SL paralectotype is less well pre- served and more scales are missing. We conclude that R. hosii is the valid name of the Sarawak R. 'sumatrana' (Fig. 38b). The type locality of R. hosii is the Baram River (Sarawak) and we have examined material from adjacent drainages in Brunei. The Sabah material listed by Kottelat & Vidthayanon (1993) as R. cf. sumatrana is an un- named species (Kottelat & Tan, in prep.). ...
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... Schismatorhynchos heterorhynchos is restricted to headwater and foothill rivers in Sumatra (Indragiri, Batang Hari, Musi) and Ka- limantan Barat (Upper Kapuas) (Siebert & Tjakrawidjaja, 1998;pers. obs.). The juveniles have a violet sheen on the body with reddish fins (Fig. 39a) and adults are dark purple-grey with grey fins (Fig. ...
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... Schismatorhynchos heterorhynchos is restricted to headwater and foothill rivers in Sumatra (Indragiri, Batang Hari, Musi) and Ka- limantan Barat (Upper Kapuas) (Siebert & Tjakrawidjaja, 1998;pers. obs.). The juveniles have a violet sheen on the body with reddish fins (Fig. 39a) and adults are dark purple-grey with grey fins (Fig. ...
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... longipinnis Ahl, 1922 was de- scribed from central Sumatra (without precise locality data) on the basis of a single, poorly preserved specimen without any colour pattern ( Kottelat et al., 1993: 55 [76], fig. 139). The species has not been reported since (see Kottelat, ...
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... General body shape and appearance are shown in Figure 43. All large size specimens are strongly arched, so that measurements are difficult to duplicate. ...

Citations

... The ornamental fish trade is a vast market of near-global range which generates an estimated yearly income surpassing tens of billions euro, with freshwater species accounting The glowlight rasbora, Trigonostigma hengeli (Meinken, 1956) is an ornamental danionid species from Borneo and Sumatra [68]. It is by far not as popular as P. innesi, or even its own congener-the harlequin rasbora, Trigonostigma heteromorpha (Duncker, 1904)-both of which are already recognized as highly domesticated species [69]. ...
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Little to no research has been conducted thus far regarding aquarium fish nutrition. In order to ensure the welfare of house-kept ornamentals, such studies should take into account that there are distinct biological differences occurring between different fish species/taxa, especially in regard to the structure of their digestive organs. Accordingly, a 12-week trial was executed to assess the effects of two commercial flakes and a mix of lyophilized natural food on the condition of co-reared neon tetras, Paracheirodon innesi (Characidae), and glowlight rasboras, Trigonostigma hengeli (Danionidae). The four feeding groups were as follows: (T)—Tetra flakes; (O)—Omega flakes; (TO)—Tetra + Omega; (TOL)—Tetra + Omega + Lyophilizate (twice a week). There were no differences in final body weight (FBW) between the feeding groups of either species, but in the case of neon tetras, FBW increased significantly from the initial value only for the T group. However, histological observations and measurements of digestive organs (livers, intestines) showed pronounced differences between the two species. The supplementation with natural food in group TOL caused lipoid hepatic degeneration only in the rasboras. The healthiest histological structure of livers and longest intestinal folds were found in group T of the tetras and group TO of the rasboras. Whole-mount staining for bone and cartilage did not reveal any significant deformities or differences in terms of bone mineralization. In conclusion, it was outlined that concurrent feeding of co-housed, anatomically diverse ornamental fish species is a highly ambiguous task, because the nutritional strategy applied for a community tank may yield radically divergent effects, most of which may remain unnoticed when depending only on external body observations and measurements. Most emphatically, this was highlighted in regard to the dietary supplementation with natural food—although no significant effects were observed in neon tetras, severe lipoid liver degeneration occurred in glowlight rasboras.
... The most abundant species is Pectenocypris micromysticetus with a total number of 2.071 individuals or 80% of the total proportion. This species is Sumatran endemic freshwater fish that a relatively described as new species for science (Tan and Kottelat, 2009). The second most abundant is Brevibora cheeya with a total number of 452 individuals (17%). ...
Article
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Jeruju River in Sumatra of Indonesia is one important remaining peat swamp area in South Sumatra Province. A study to looking at fish diversity and abundance of pelagic small fishes in Jeruju River was conducted on 28 to 30 August 2020. There are six species of pelagic small fishes recorded caught using hand lift net 1x1 m 2 , including Brevibora cheeya, Desmopuntius gemellus, Oxygaster anomalura, Pectenocypris micromysticetus, Rasbora einthovenii and Trigonopoma sp. The species range from 19-45 mm in total length. Pectenocypris micromysticetus is most abundance fish species (up to 80%), following Brevibora cheeya (17%), Desmopuntius gemellus (0,32%), Oxygaster anomalura (0,63%), Rasbora einthovenii (0,40%) and Trigonopoma sp (0,24%).
... Therefore, the fish supply has been swift from wild populations to aquaculture productions to meet the market demand (FAO, 2020). As the bioecology of the fish in general has been well documented (Tan and Kottelat, 2009), along with the successfully developed breeding technologies (Legendre et al., 2012) the aquaculture productions are playing a key role in many emerging economies. Spawning difficulties of God's fish appeared due to the asynchronous gonad maturation (Junior et al., 2005) of the fish. ...
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The objective of this study was to determine the optimum concentration of egg yolk of free-range chicken as a cryoprotective agent on cyprinid fish, Neolissochilus soroides sperm after 48 hour frozen. One level of methanol (10%) combined with six levels of egg yolk solution (0%, 5%, 10%, 15%, 20% and 25%) were tested. Fish Ringer’s solution was used as an extender. The diluted sperm was equilibrated for 10 minutes at 5 oC, then kept at -10 oC temperature for 48 hours. Sperm was thawed for 1 minute at 40 oC. Spermatozoa viability, abnormality, and fertilization rates were analysed afterwards. The one-way ANOVA showed that the combination methanol with several concentrations of egg yolk solution had a significant effect on spermatozoa viability, abnormality, and fertilization rates (P<0.05) by improving semen character. The study revealed that the 5% egg yolk solution combined with 10% methanol resulted in the highest rates of viability (82.13 ±1.75%) and fertility rates (92.96 ±1.94%), with the lowest abnormality (25.25 ±2.22%). A 5% egg yolk solution was identified as the best cryoprotective agent for N. soroides spermatozoa preservation at -10 oC for 48 hours.
... Spesies ikan yang telah terkelompok dihitung dan diidentifikasi berdasarkan karakter morfometrik dan meristik dengan berpedoman pada buku identifikasi Kottelat et al. (1993), Kottelat & Whitten (1996), Kottelat & Whitten (2009), Roberts (1993, Rachmatika (2004) dan Fishbase. Spesimen ikan yang telah teridentifikasi segera dicuci dengan air mengalir dan disimpan dalam wadah sampel yang berisi larutan alkohol 70% sebagai koleksi ilmiah. ...
Article
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Studi ini bertujuan untuk mengkaji biodiveristas ikan dan beberapa dinamika terkait seperti karakteristik habitat, komposisi dan keragaman komunitas, status IUCN red list dan kemanfaatan. Penelitian dilakukan pada daerah hulu Sungai Sambas dan Danau Kurapan Desa Sepantai Kalimantan Barat. Untuk menghimpun data potensi biodiversitas ikan dilakukan pengamatan karakteristik habitat perairan, pengumpulan sampel ikan yang akan menggambarkan komposisi dan keragaman ikan serta penyusunan daftar status IUCN red list dan kemanfaatannya. Hasil sampling ikan selama penelitian didapatkan 152 individu yang berasal dari 124 (81.58%) dan 28 (18.42%) ekor masing-masing hasil tangkapan hulu Sungai Sambas dan Danau Kurapan tergabung dalam 22 spesies dan 13 famili. Analisis IUCN Red List ikan menunjukkan tiga kategori yaitu belum dievaluasi (NE) ada 6 spesies (27%), berisiko rendah (LC) ada 6 spesies (27%) dan belum terbaca ada 10 spesies (46%). Sedangkan potensi ikan yang terkoleksi menunjukkan 2 spesies (9%) berpotensi sebagai ikan hias, 3 spesies (14%) berpotensi sebagai ikan konsumsi dan 17 spesies (77%) berpotensi sebagai ikan hias dan juga ikan konsumsi yang secara keseluruhan merupakan spesies alami (native species) asli Indonesia. Spesies ikan yang memiliki distribusi spasial tertinggi adalah Bagrichthys sp, Kryptopterus sp, Ceratoglanis scleronema dan Mystus sp pada hulu Sungai Sambas dan Parachela sp dan Osteochilus kapenii pada Danau Kurapan. Dalam rangka mempertahankan atau menjaga agar biodiversitas iktiofauna tetap lestari, maka hal yang perlu dilakukan adalah: (1) Penetapan kawasan konservasi perairan; (2) Pembatasan jenis alat tangkap; (3) Peningkatan kapasitas kelompok masyarakat, dan; (4) Peningkatan ekonomi kreatif masyarakat. Kata kunci: biodiversitas, iktiofauna, IUCN, sungai sambas, danau kurapan
... One of the earliest lists of ornamental fishes imported from Singapore into Europe was documented by Boeseman (1957). In his list, he included species previously not recorded from Singapore, viz., Kryptopterus vitreolus (previously known as K. bicirrhus; a species known from southern and eastern Thailand; see Ng & Kottelat, 2013a), Chromobotia macracanthus (identified as Botia macaracanthus; a species known only from Sumatra and Borneo; see Tan &Kottelat, 2009, andKottelat et al., 1993), Trigonopoma pauciperforatum (identified as Rasbora pauciperforata; a species known from from Peninsular Malaysia, Borneo and Sumatra; see Kottelat et al., 1993), Trigonopoma gracile (identified as Rasbora taeniata; a species known from Malaysia, Borneo and Sumatra; see Kottelat et al., 1993), Puntigrus partipentazona (identified as Puntius partipentazona; a species known from Peninsular Malaysia and Thailand; see Mohsin & Ambak, 1983), Sphaerichthys osphromenoides (a species known from peat swamps in Peninsular Malaysia, Sumatra and western Borneo; see Kottelat et al., 1993, andTan &Ng, 2005) and Gymnochanda filamentosa (described as a new genus and new species, but later found to be a homonym of an earlier identical name given by Fraser-Brunner in 1955; apparently Fig. 121. Distribution of non-native fish species (established as well as non-established) records from 1849 to 2016 (n = 648). ...
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A total of 123 species of non-native freshwater fish, including seven possible hybrids, are recorded from the inland waters in Singapore. The majority (84 species, 68.3%) are from four families: Cyprinidae (37 species, 30.1%), Cichlidae (30 species, 24.4%), Osphronemidae (9 species, 7.3%), and Poeciliidae (8 species, 6.5%). Of these, 42 species-mainly cichlids (12 species)-are established in Singapore. The likely pathways of introduction and pertinent conservation issues are briefly discussed. Notes on local distribution, species used for biological control, dubious records, early records of native fish species, ornamental fish trade and aquacultural species are also provided. An addendum is included for four more species.
... Due to this reason, it is not a surprise if R. guttatus has overlooked along its geographical distribution range. In Indonesia, the presence of R. guttatus has been reported for the first time from Sumatra by Tan & Kottelat (2009). The present record is considered the 2 nd appearance for this species from Indonesia. ...
... Raiamas guttatus has been record in Sumatra, Kiliran Jao and Sungai Dareh (Tan & Kottelat 2009). Both sites are located in West Sumatra Province, central Sumatra (00 0 N). ...
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One specimen of Burmese Trout Raiamas guttatus (Day, 1870) was caught on 17 February 2018 in the Blungun River, South Sumatra Province, Indonesia. This specimen revealed a southermost record of R. guttatus in its distributional range.
... Four species of the small cyprinid genus Pectenocypris endemic to Indonesia, are known: Pectenocypris balae na, from western Borneo (Province Kalimantan Barat), P. korthausae from southern Borneo (Province Kaliman tan Tengah) and Sumatra, P. micromysticetus from Su ma tra (Province Jambi) and P. nigra from Sumatra (Pro vince Riau) (RobeRts, 1989;Doi, 1997;tan & Kottelat, 2009;WiboWo et al., 2016). The species of Pectenocy pris are filter feeders characterized by possessing numer ous and elongated gillrakers, a slender body and a small size (< 45 mm SL) (Kottelat, 1982;RobeRts, 1989;Rain both, 1991). ...
... Counts and measurements follow Kottelat (2001). In the range of meristic and morphometric characters we fol low tan & Kottelat (2009). Additionally we provide the following measurements: head width (distance from left to right dorsal origin of the opercular opening), postor bital length (posteriormost edge of eye to posteriormost point of opercle), prepectoral length (tip of snout to dorsal origin of pectoral fin), predorsal length (tip of snout to or igin of dorsal fin), prepelvic length (tip of snout to dorsal origin of pelvic fin), preanal length (tip of snout to origin of anal fin), dorso-hypural distance (origin of dorsal fin to origin of hypural plate) and pectoralpelvic length (dor sal origin of pectoral fin to lateral origin of pelvic fin). ...
... To date five species of the danionine genus Pectenocy pris are known: P. balaena (Fig. 7A) P. korthausae (Fig. 7B, C), P. micromysticetus, P. nigra (Fig. 7D) and P. rubra (Fig. 2). All species are small fishes (< 45 mm SL) with a similar body shape, slender and compressed (Kottelat, 1982;RobeRts, 1989;tan & Kottelat, 2009; this study). The live coloration of P. balaena and P. korthausae is not known. ...
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A new cyprinid species, Pectenocypris rubra, is described from peat swamps from central Sumatra (Indonesia). This species is only known from peat lakes upstream of the river Serkap, a tributary of the Kampar River. Pectenocypris rubra differs from the other four species of this genus in the following combination of characters: a distinct mid-lateral stripe, an oval black spot at the base of the caudal fin, scales in lateral midline 33, 7-8 pored lateral line scales, 202 gill-rakers on first gill arch, small dark grey symphyseal knob on lower jaw, and a long and narrow caudal peduncle.
... There are at least 1189 native species, whereas 125 of them are endemic to the country (Froese and Pauly 2014). Sumatra island a high level of biodiversity of freshwater fishes with a high degree of endemism (Sodhi and Brook 2006;Pfeil 2009), including a small transparent fish that morphologically shows the character of the Gobiidae group. The fish locally is known as Rinuak fish, with the total length range 19.91 to 22.68 mm and previously considered as an endemic species of Maninjau Lake. ...
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Roesma DI, Tjong DH, Aidil DR. 2020. Phylogenetic analysis of transparent gobies in three Sumatran lakes, inferred from mitochondrial Cytochrome Oxidase I (COI) gene. Biodiversitas 21: 43-48. The transparent gobies fish found in three lakes in Sumatra island is known as Rinuak fish (in Maninjau Lake and Singkarak Lake, West Sumatra, Indonesia) or Badar fish (in Siais Lake, North Sumatra, Indonesia), and are morphologically very similar to the Gobiopterus brachypterus. The phylogenetic study was carried out by analyzing 619 base pairs of the mitochondrial DNA cytochrome oxidase subunit I (COI) gene in 12 fish individuals from the three lakes. Rinuak and Badar fish in three populations have four haplotypes. The sequence divergences in and between populations are very low (0.0-0.5%). This value indicates that Rinuak and Badar fish are the same species with low genetic diversity. The phylogenetic tree illustrates that this fish belongs to the group of Gobiidae and a sister taxon from G. brachypterus.
... Pangio bhujia has an unusual vertebral count of 62-63 vertebrae. This is only matched by P. doriae, P. pulla, and P. bitaimac all of which are greatly elongated species of the P. anguillaris group in which vertebral counts range from 61-71 (Kottelat & Lim 1994, Tan & Kottelat 2009). While 38-39 abdominal vertebrae are present in some species of eel loaches from Myanmar (Britz & Maclaine 2007) and in P. alcoides (Kottelat & Lim 1994), the count of 23-24 caudal vertebrae is unique in the genus Pangio with the highest count of 20 caudal vertebrae reported for P. anguillaris (Kottelat & Lim 1994). ...
Article
A unique, new species of eel loach, Pangio bhujia, is described from Kerala, India. It is the first species of Pangio to be described from subterranean waters. It possesses several unusual characters including absence of both dorsal and pelvic fins, the presence of only 3 pectoral-fin rays, 6 anal-fin rays and a unique count of 38 precaudal + 24 caudal vertebrae.
... It seems that Endruweit (2017) placed the species in Physoschistura only on the basis of the presence of a small posterior chamber of the air bladder in the abdominal cavity. His discussion fails to recognise that genera (or taxa at any level) diagnosed by an array of characters may also include species that show most of these characters but that one or the other character may eventually differ from what is observed in the other members of the taxon, as a result of reversal, apomorphy, parallelism, etc. (example in Nemacheilidae: the papillated lips of Nemacheilus papillos whereas all congeners have smooth lips; Tan & Kottelat, 2009), or that some characters may be developed at various degrees and at various stages of life. This applies to the development of the swimbladder. ...
Article
Mustura celata, new genus and species, is described from small tributaries of Lake Indawgyi, Myanmar. Mustura is distinguished from other genera of Nemacheilidae by having: the male pectoral fin slanted upwards, with branched ray 1 wider than following rays, branched once and branches close together, without membrane between them except near tip; wide, thickened unculiferous pad extending along anterior branched pectoral-fin rays, covered dorsally by small conical tubercles; two air bladder capsules connected by a manubrium and posterior chamber small and circular, or absent; lower lip with wide median interruption, two halves forming an acute angle, not in contact medially, wide and fleshy medially, forming a triangular ‘cushion’, partly free from jaw and connected to throat by a frenum; suborbital flap present, with small tubercles on posterior extremity. Most species earlier placed in Physoschistura in fact belong to Mustura. Physoschistura is diagnosed by having the two halves of the air bladder capsule joined medially (without manubrium) and the posterior chamber free, well developed and in direct contact with the capsule; it presently includes only P. brunneana (type species), P. pseudobrunneana, and possibly P. elongata, P. raoi and P. rivulicola. Mustura celata is distinguished from the other species of Mustura by, among others, the colour pattern (6-10 [usually 7] very irregular blotches or bars on flank, alternating with irregular saddles); 9 + 8 branched caudal-fin rays; 8 ¹/2 branched dorsal-fin rays; lateral line complete; caudal peduncle depth 1.3-1.7 times in its length. Schistura shuensis, S. maepaiensis and S. bella belong to Mustura. Physoschistura absumbra belongs to Schistura s. l.; P. shuangjiangensis belongs to a distinct genus, apparently unnamed. Mustura, Pteronemacheilus, Physoschistura and Petruichthys seem to be closely related; they share features of the mouth morphology and unique features of the male pectoral fin and suborbital flap.