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Homalopteroides tweediei (HERRE, 1940)

March 13th, 2012 — 1:25pm

Described from Kota Tinggi district, Johor state, Peninsular Malaysia but since recorded throughout much of the country as well as parts of the the Mekong river system in Thailand, Laos, Cambodia and Vietnam plus the Kapuas and several other river basins in Kalimantan Barat (West Kalimantan) province, Indonesian Borneo.

In the Kahang River, part of the Endau drainage in Jo…

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Gastromyzon sp. 'SK01'

March 13th, 2012 — 1:25pm

This undescribed species has probably not been seen in the aquarium trade yet but is occasionally maintained private collectors. The ‘SK’ numbering system used here refers to ‘South Kalimantan’, home to several unidentified members of the genus.

Gastromyzon spp. are placed into various ‘species groups’ (artificial assemblages of species which may or may not be monophyletic) for ease of reference, and based on colour and patterning G. sp. ‘SK01’ appears similar to members of the G. ridens group which also includes G. crenastus, G. stellatus and G. zebrinus.

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Gastromyzon sp. 'SK02'

March 13th, 2012 — 1:25pm

Known only from headwaters of the Sungai (river) Amandit, a tributary of the larger Barito basin in the Meratus mountain range, Kalimantan Selatan (South Kalimantan) province, Indonesian Borneo.

There currently exist 36 officially-described members of the genus, all of which are endemic to the island with over half restricted to a single river basin or sub-basin.

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Gastromyzon sp. 'SK03'

March 13th, 2012 — 1:25pm

Gastromyzon spp. are obligate dwellers of swift, shallow streams containing clear, oxygen-saturated water and have been recorded from sea level to 1350 m amsl throughout hill regions of Borneo.

They typically inhabit riffles and runs and are often found above or below cascades and waterfalls.

Substrates are generally composed of gravel, rocks, boulders or bedrock carpeted with a rich biofilm formed by algae and other micro-organisms.

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Gastromyzon zebrinus TAN, 2006

March 13th, 2012 — 1:25pm

Much of the natural diet is likely to be composed of benthic algae plus associated micro-organisms which are rasped from solid surfaces.

In captivity it will accept good-quality dried foods and meatier items like live or frozen bloodworm but may suffer internal problems if the diet contains excessive protein.

Home-made foods usi…

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Gastromyzon ctenocephalus ROBERTS, 1982

March 13th, 2012 — 1:25pm

One of the more commonly-traded members of the genus and often found in mixed shipments which may contain other Gastromyzon spp. or related fishes like Beaufortia kweichowensis, these often labelled collectively as ‘Borneo sucker’, ‘Hong Kong pleco’, ‘butterfly loach’, etc. It’s sometimes misidentified as G. punctulatus, a species not currently traded which possesses yellow finnage and a lighter-coloured, less-intensely spotted body.

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Lepidocephalichthys hasselti (VALENCIENNES, 1846)

March 13th, 2012 — 1:25pm

At one locality close to Ban Na Hwai, Chiang Mai Province, Thailand L. hasselti was collected from a shallow (<0.5 m) pool in a swampy zone between forest and rice fields. The substrate was of mud, there was no aquatic vegetation and it was being used as drinking water by local animals, with the only effluent connected to a 'small creek'. Other species found there were Physoschistura pseudobrunneana, Rasbora hobelmani and Systomus cf. orphoides.

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Oryzias javanicus (BLEEKER, 1854)

Javanese Ricefish

March 13th, 2012 — 1:25pm

This species is widely-distributed throughout Peninsular Thailand, Malaysia (Malay Peninsula plus the states of Sabah and Sarawak, Borneo), Singapore and Indonesia, with records from the Riau Archipelago, Sumatra, Java, Borneo, Bali, Lombok, and Sulawesi existing in the latter. Type locality is ‘Panimbang River, Perdana, Indonesia’.

It’s typically found in coastal, normally brac…

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Acantopsis dialuzona VAN HASSELT, 1823

Horse Face Loach

March 13th, 2012 — 1:25pm

Juveniles of this 'species' (probably a group of species – see 'distribution') are traded in large numbers but it's still uncommon to see adult specimens in the hobby suggesting their needs are not catered for often enough. This is a shame as when maintained properly they're hardy, long-lived and interesting aquarium residents. Other trade names include 'long-nosed' and 'banana' loach. Please note although certain that more than one species is being tr…

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Crossocheilus nigriloba POPTA, 1904

March 13th, 2012 — 1:24pm

While separating some of the fish that may be found on sale as ‘C. siamensis’ is a tricky task, C. nigriloba is quite simple to identify. The dark lateral body stripe uniquely breaks up into a series of blotches when the fish are sparring, stressed or sleeping and the lower caudal fin lobe contains dark pigmentation suffused with red. The latter feature has given rise to the trade name of ‘penguin flying fox’.

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