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Metzia lineata (PELLEGRIN, 1907)

November 6th, 2014 — 12:32pm

Populations from the upper Pearl River (Nanpan Jiang basin) differ in several morphological characters from those inhabiting Guangdong, Guangxi, and Guizhou Provinces, and Hainan Island. Those from Vietnam also seem to be different (Gan et al., 2009), the implication being that there may be several species currently included under the name M. lineata.

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Metzia formosae (OSHIMA, 1920)

November 5th, 2014 — 8:16pm

Although it is included in the genus Metzia this grouping remains somewhat unresolved in terms of taxonomy and it may contain more than a single genetic lineage. For example, members share a number of characters with the genera Ischikauia Jordan and Snyder 1900, Hemiculterella Warpachowski 1887, and several species of Anabarilius Cockerell 1923, including a bipartite gas bladder, a non-spinous dorsal-fin ray, and a sharp ventral keel between the pelvic-fin insertion and anus.

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Garra orientalis (NICHOLS, 1925)

October 20th, 2014 — 5:09pm

Among other Garra species from Southeast Asia and China, G. orientalis is most similar to G. salweenica and G. fuliginosa in that all three possess a roughly triangular, trilobed proboscis on the snout, the anterior margin of which is densely tuberculated, and the inferior margin not in contact with the depressed rostral surface, i.e., the proboscis projects forwards.

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Rhinogobius leavelli (HERRE, 1935)

June 18th, 2013 — 3:40pm

This species appears to exist in a number of different forms which exhibit differences in colour pattern, morphology, or both, and it’s currently unclear whether all of them are truly conspecific or not although those in the aquarium trade all appear similar to one another.

We’ve been unable to obtain a copy of the original description so it’s not currently possible to provide a detailed diagnosis either, with most recent studi…

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Yaoshania pachychilus (CHEN, 1980)

Panda Loach

March 13th, 2012 — 1:26pm

Juvenile specimens were first exported for the aquarium hobby during 2009 and have since been available on a sporadic basis with prices generally reflecting its rarity and, hopefully, number of specimens being collected. The striking black-and-white-striped juvenile colour pattern inspired the vernacular name although it’s sometimes labelled as ‘panda goby’ rather than ‘panda loach’.

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Parabotia lijiangensis CHEN, 1980

March 13th, 2012 — 1:26pm

It’s told apart from congeners by a combination of characters as follows: large scales present on body and sides of head; caudal fin deeply forked with subequal lobes; 10-13 dark, vertical bars on the body; a dark, ocellated spot in the centre of the caudal-fin base; two bars on top of head, dorsal-fin with two rows of greyish spots; caudal-fin lobes with 3-4 dark bands on each; anal-fin with one indistinct band and another, more distinct, submarginal band; ventral fins with two indistinct bands.

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Paramisgurnus dabryanus DABRY DE THIERSANT, 1872

March 13th, 2012 — 1:26pm

It’s actually sold in the aquarium hobby on a regular basis but almost always labelled as or mixed in with Misgurnus anguillicaudatus and is thus poorly documented.

Although quite simi…

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Sinogastromyzon wui FANG, 1930

March 13th, 2012 — 1:26pm

This species is probably the most common member of the genus in the aquarium trade but still not often exported in numbers.

Instead it’s more often found in mixed shipments of other wild-collected fishes from southern China, particularly Beaufortia or Pseudogastromyzon spp.

It may appear superficially simi…

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Leptobotia pellegrini FANG, 1936

March 13th, 2012 — 1:25pm

Described from Sichuan province, southwestern China (presumably the upper Yangzte River, aka Chang Jiang, drainage) and also known from parts of the Pearl River (Zhu Jiang) basin in Guangxi Autonomous Region. The latter area is one of the most populous and industrialised in China meaning much of the main river channel is now highly polluted. Its relatively wide distribution probably explains why it’s commoner in the aquarium hobby than the similar-looking…

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Liniparhomaloptera disparis (LIN, 1934)

Broken-band Hillstream Loach

March 13th, 2012 — 1:25pm

L. disparis is sometimes available as bycatch among shipments of other species such as Rhinogobius duospilus but also appears on trade lists under the fictitious scientific name ‘Homaloptera hoffmani’.

It can be told apart from similar-looking members of the genus Formosania by its noticeably shorter barbels and from Vanmanenia spp. by the fact that the rostral fold is not lobed and the mouth is relatively small (25% head width. In addition the lower lip in Liniparhomaloptera is not divided and has a flat, papillated edge.

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