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Macrochirichthys macrochirus (VALENCIENNES, 1844)

Giant Sword Minnow

November 4th, 2014 — 8:18pm

It is thought to have been extirpated from the Chao Phraya and Mae Klong rivers, Lake Songkhla, and the entire island of Java due to a variety of anthropogenic factors, and the Mekong populations have also been drastically reduced. In particular, it is sensitive to pollution and gillnetting, and is heavily overfished.

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Laubuka siamensis FOWLER, 1939

October 29th, 2014 — 9:04pm

Considered synonymous with the congener L. laubuca for a number of years, thus reports of that species from anywhere in Indochina actually refer to the current concept of L. siamensis.

Given the distribution of L. siamensis, it seems likely that many of the fish entering the aquarium trade are also this species and not L. laubuca. The two species can be distinguished by…

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Labiobarbus leptocheilus VALENCIENNES, 1842

October 26th, 2014 — 6:32pm

Different populations vary in appearance somewhat (see image of Salween specimen for example), and L. leptocheilus may turn out to represent a group of closely-related species rather than a single taxon. The population from the Cambodian Mekong has been considered to represent a distinct species, Labiobarbus lineatus, although that name is currently a synonym of L. leptocheilus following Kottelat (2013). It is widely used in the ornamental trade, however.

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Schistura geisleri KOTTELAT, 1990

October 9th, 2012 — 7:37pm

Fishes which inhabit similar biotopes in nature constitute the best options, especially peaceful, open water-dwelling cyprinids since the presence of one or two schools can make a visible difference to the confidence of this naturally reclusive loach.

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Indostomus crocodilus BRITZ & KOTTELAT, 1999

May 20th, 2012 — 6:35pm

The type series was collected from a blackwater stream in Toh Daeng Peat swamp forest with the fish found in slow-moving or standing habitats among submerged shoreline roots and leaf litter. In the Tapi River floodplain it was collected from stagnant waters, one of which was an oxbow lake approximately 200 m long and 30 m across at its widest point, surrounded by ‘freshwater scrub and swamp trees’. The substrate was composed of mud, woody structures including fallen twigs and branches, and decomposing plant material.

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Akysis pulvinatus NG, 2007

March 13th, 2012 — 1:26pm

This species has been exported for the aquarium hobby on an extremely limited basis. It can be differentiated from all other Akysis species by the following combination of characters: head length 27.6–29.8% of standard length (SL); head width 21.9–25.1% SL; caudal peduncle depth 9.4–10.3% SL; length ofbase 23.0–25.2% SL; nasal barbel len…

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Vaillantella maassi WEBER & DE BEAUFORT, 1912

Fork-tailed Loach

March 13th, 2012 — 1:26pm

This species is traded under various names including 'chocolate scissor-tailed loach', chocolate long-finned loach', 'red line cobra loach', 'spiny eel loach' and 'dragon loach'. It's apparently difficult to find in its natural habitats and thus time-consuming to collect, meaning it's rarely traded in numbers, sought after by enthusiasts and tends to carry a relatively high price tag when available.

The genus currently contains just three…

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Nemacheilus ornatus KOTTELAT, 1990

March 13th, 2012 — 1:25pm

This species is distinguished from similar-looking congeners such as N. longistriatus and N. ornatus by its unique colour pattern consisting of a black lateral body stripe with 9-16 vertically-orientated blotches extending along it both above and below, plus an irregular stripe running along the dorsal surface. The anterior lateral blotch is surrounded by lighter pigment, forming an ocellus similar to that seen in N. binotatus.

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Pseudohomaloptera leonardi (HORA, 1941)

March 13th, 2012 — 1:25pm

Type locality is given as ‘Kuala Tahan, Pahang (King George V National Park)’ which corresponds to the village of Kuala Tahan in Pahang state, central Peninsular Malaysia.

The settlement is located at the confluence of the Tahan and Tembiling Rivers which form part of the Pahang river basin, while the national park was re…

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Acanthopsoides molobrion SIEBERT, 1991

March 13th, 2012 — 1:25pm

Acanthopsoides spp. are most closely related to the horse-faced loaches of the genus Acantopsis with which they often co-occur in nature, and thus commonly referred to as 'dwarf horse-face loaches'. The genus currently comprises five species of which four were described by Siebert (1991); these were discovered in existing museum holdings…

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