| | [這篇文章最後由cscr在 2006/05/12 02:27am 第 3 次編輯]
Usually, fishes of the tremendously diverse group Bagridae are grossly separated by several major distinct traits(eg. bare occipital bone, number of barbels, forked or truncated caudal fin......) into distinct genus - a relatively simple work for ichthyologists.
But the subsequent work to furtherly divide specimens into respective species is both laborious and less convincing!
This is largely due to the fact that species-level diagnostic features in this group are mainly morphometric(highly variable and easily distorted in the process of specimen preservation), too often decisions based on such traits are either imprecise or arbitrary, thus it is not so easy to judge the exact identy of your Pseudobagrus, even for a seasoned specialist!
You can refer to the newly published "Fishes of the World" 4th edition, for a general description of this group of fishes, if a further konwledge is dictated, another comprehensive monograph by Mo. T. may be helpful.
http://as.wiley.com/WileyCDA/Wileytitle/productCd-0471250317.html
Mo, T: Anatomy, relationships and systematics of the Bagridae (Teleostei: Siluroidei)-with a hypothesis of siluroid phylogeny. Theses Zoologicae 17, Konigstein: Koeltz Scientific Books, 1991
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Usually, fishes of the tremendously diverse group Bagridae are grossly separated by severa ... 
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2006/05/11 04:13pm 
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