纹胸鮡属鱼类是亚洲鲇形目的第一大属，至今已发现有约80个物种分布在中印山区各水系的广大地区。伍献文等 (1981) 描述了模式产地位于怒江上游西藏境内的扎那纹胸鮡Glyptothorax zanaensis；李树深 (1984) 描述了怒江中上游云南境内的长须纹胸鮡Glyptothorax longinema和澜沧江水系的红颏纹胸鮡Glyptothorax rubermentus；莫天培 & 褚新洛 (1986) 认为李树深 (1984) 描述的长须纹胸鮡和红颏纹胸鮡均为扎那纹胸鮡的同物异名，但并没有做详细的比较。后续研究皆沿用莫天培 & 褚新洛 (1986) 的观点认为扎那纹胸鮡是一个跨怒江与澜沧江分布的广布种。
系统进化与生物地理学研究组成员 (蒋万胜、杨君兴、陈小勇) 与新加坡鱼类学者 (Heok Hee Ng) 前期通过合作的方式构建了纹胸鮡属这一复杂类群的系统发育关系 (Jiang et al.， 2011)，这一工作发现：历史上被认为广泛分布的扎那纹胸鮡实际上可能包含了不止一个物种。结合该课题组多年在野外采集的实际经验和不同地点收集到的样本的形态学差异，迫使研究人员对这一复合体进行了更加详细而深入的整理。通过形态学常规测量性状、骨骼解剖和多变量形态度量值的主成分分析，并结合扩大取样范围的分子系统发育学结果，研究人员重新界定和描述了扎那纹胸鮡，恢复和重新描述了长须纹胸鮡；同时还描述了怒江水系的两个新种——粒线纹胸鮡Glyptothorax granosus和异色纹胸鮡Glyptothorax fucatus。这一结果澄清了广布种扎那纹胸鮡的分类学问题，已于近期发表在国际著名刊物《林奈学会动物学杂志》Zoological Journal of the Linnean Society上。
doi:10.1111/j.1096-3642.2011.00811.x
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A taxonomic review of the catfish identified as Glyptothorax zanaensis (Teleostei: Siluriformes: Sisoridae), with the descriptions of two new species
WANSHENG JIANG1,2,†, HEOK HEE NG3,4,†, JUNXING YANG1,*, XIAOYONG CHEN1,*
This study re-examined the taxonomic status of the sisorid catfishes usually identified as Glyptothorax zanaensis using a combination of morphometric and molecular data. Our results resurrect Glyptothorax longinema from the synonymy of G. zanaensis, and we describe two previously unnamed species as Glyptothorax granosus sp. nov. and Glyptothorax fucatus sp. nov. All four species are diagnosed and described in detail. Truss-based morphometrics combined with principal component analysis (PCA) detected three principal components (PCs) that can explain 86% of the total variation amongst species, which mainly reflect the characteristics of body depth, related depth, adhesive apparatus length, pectoral-fin length, caudal peduncle length, and barbel lengths. We also generated a phylogenetic hypothesis of these species using concatenated mitochondrial cytochrome b and d-loop gene sequences. Molecular dating analysis revealed a rapid speciation of Glyptothorax in the south-eastern corner of the Qinghai-Xizang Plateau from the middle Pliocene to early Pleistocene. A key to identify the Glyptothorax species from the Salween River drainage is also provided.
