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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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Laubuka caeruleostigmata SMITH, 1931

Flying Minnow

October 26th, 2014 — 8:52pm

This species is also known as ‘leaping barb’ and was once quite common in the ornamental trade but is now seldom seen.

It can be distinguished from other members of the genus by the following characters: bright blue spot on top of head; series of 4-5 short faint bars on anterior portion of body; 19-23½ branched anal-fin rays; body depth fits 2.1-2.9 times in SL.

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Labiobarbus siamensis (SAUVAGE, 1881)

October 26th, 2014 — 7:41pm

L. siamensis can be distinguished from congeners by the following combination of characters: 39-42 scales in the lateral series; shoulder spot usually absent, but sometimes well-defined; body with longitudinal stripes formed by a spot on each scale; dorsal fin with dusky median stripe and no red coloration; caudal fin dusky, sometimes with reddish coloration, but no well-defined stripes; 20-23 circumpeduncular scales…

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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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Labeo pierrei (SAUVAGE, 1880)

October 26th, 2014 — 4:29pm

This species can be distinguished by the following characters: juveniles with brown body and dark marking at base of caudal-fin; 37-42 + 3-4 lateral line scales; 11½ branched dorsal-fin rays; 7½ scale rows between lateral line and dorsal-fin origin; 20-25 predorsal scales; dorsal-fin relatively small with anterior branched rays shorter than head in juveniles, slightly longer than head in adults.

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Labeo chrysophekadion (BLEEKER, 1849)

Black Shark

October 26th, 2014 — 1:55pm

L. chrysophekadion is also known as ‘black sharkminnow’. It continues to be available in the ornamental trade despite its patent unsuitability for the home aquarium, and an albino form has been selectively bred for the purpose.

It can be distinguished from other members of the genus by the following combination…

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Incisilabeo behri (FOWLER, 1937)

October 25th, 2014 — 5:45pm

The monotypic genus Incisilabeo is separated from the closely-related taxon Bangana by presence of a unique and conspicuous transverse notch across the top of the head, comparable in position to the ethmoid furrow in Bangana species. This notch approaches the eye, and the top of the head bulges forward, with the nostrils located partially beneath this projection and immediately anterior to the eyes. Tubercles cover the upper portion of the rostral fold, lower part of the notch, and upper surface of the forehead projection…

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Hypsibarbus wetmorei (SMITH, 1931)

October 25th, 2014 — 5:02pm

H. wetmorei is distinguished from congeners by the following combination of characters: upper body reddish brown; robust body, not compressed; usually 4½ scale rows between lateral line and dorsal-fin origin; 8-12 rakers on first gill arch; 7-9 predorsal scales; 14 circumpeduncular scale rows; usually two scale rows separating vent and anal-fin; <29 lateral line scales; 9-14 serrations on the spinous dorsal-fin ray; distance between distal serrae on posterior margin of last unbranched dorsal-fin ray much greater than the width of their bases.

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Hypsibarbus vernayi (NORMAN, 1925)

October 25th, 2014 — 4:04pm

It is very similar to H. wetmorei but can be told apart by possessing yellow (vs. orange to red in H. wetmorei) pectoral, pelvic, and anal fins. It thus appears likely that yellow-finned fish marketed as H. wetmorei or ‘lemon fin barb’ in the ornamental trade are actually H. vernayi, with both species available on a regular basis.

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Hypsibarbus pierrei (SAUVAGE, 1880)

Yellow Eyed Silver Barb

October 25th, 2014 — 12:46pm

Known from the middle and lower Mekong basins in Laos, Thailand, Cambodia, and Vietnam, plus the Dong Nai drainage in central Vietnam.

Type locality is ‘Rapids of Dang-nai, Bien Hoa Province, Thailand’, which corresponds to what is now the city of Biên Hòa in Đồng Nai province, southern Vietnam.

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