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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 36, No. 6, 2015, pp. 348-353
Bioline Code: zr15041
Full paper language: English
Document type: Report
Document available free of charge

Zoological Research, Vol. 36, No. 6, 2015, pp. 348-353

 en Morphometric studies of genus Placocheilus check for this species in other resources (Teleostei: Cypriniformes) from Red River, China
Zhou, Wei; Li, Min-hui; Wang, Chun-ping & Qi, Mi


It is practically difficult to differentiate Placocheilus robustus check for this species in other resources and Placocheilus caudofasciatus check for this species in other resources from Red River drainage of China. Without stated reasons, P. robustus has been assumed as the synonyms of P. caudofasciatus. The present study aims to decipher the morphological differences between two species so as to provide reliable clues for their classification by multivariate morphometry. A total of 72 specimens of two species in genus Placocheilus were examined. Besides morphological character comparisons, 10 anatomic landmarks were utilized and 23 frame structures and 15 general characters measured. The scatter plot results of principal component analysis showed that all specimens were clustered together and could not be defined as two distinct species. No significant morphological differences existed in four diagnostic characters between P. robustus and P. caudofasciatus. Thus the results of the present study fail to support P. robustus as a valid and independent species.

Placocheilus caudofasciatus; Mophomemetrics; Evidence for taxonomy; Placocheilus robustus; Principal component analysis

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