Re-examination of the type series of Parazacco spilurus (Teleostei: Cyprinidae)

Taiki ITO, Kazumi HOSOYA


The genus Parazacco comprises two species viz. P. spilurus and P. fasciatus. The division of the genus into two distinct species that was maybe not warranted caused by the lack of clarity and incomplete data in previous descriptions of syntypes of P. spilurus. Therefore, we re-examined, redescribed, and illustrated the external morphology of syntypes of P. spilurus, type species of the genus. The syntypes were found to be smaller in body size than that of specimens observed in the original description of P. fasciatus, the conclusions are that the two species are not distinct and recommend that they be put under one species name, P. spilurus, although further study is recommended.


Aspius spilurus, Northern Vietnam, Opsariichthines, Southern China.

Full Text:



Arai R., Kato K. 2003. Gross morphology and evolution of the lateral line system and infraorbital bones in bitterlings (Cyprinidae, Acheilognathinae), with an overview of the lateral line system in the family Cyprinidae. The University Museum, The University of Tokyo, Bulletin 40: 1-42.

Bănărescu P.M. 1968. Revision of the genera Zacco and Opsariichthys (Pisces, Cyprinidae). Vĕstník Československé Společnosti Zoologické 32: 305-311.

Bookstein F.L., Chernoff B., Elder R.L., Humphries J.M., Smith G.R., Strauss R.E. 1985. Morphometrics in evolutionary biology. The Academy of Natural Sciences of Philadelphia. Philadelphia. 277 p.

Chen Y.Y. 1982. A revision of opsariichthine cyprinid fishes. Oceanologia et Limnologia Sinica 13: 293-299.

Chen Y.Y., Chu X.L. 1998. Danioninae. In: Y.Y. Chen (Ed.). Fauna Sinica. Osteichthyes. Cypriniformes II. Beijing, Science Press. pp: 19–61.

Fujita T., Hosoya K. 2005. Cephalic lateral line systems in the Far Eastern species of the genus Phoxinus (Cyprinidae). Ichthyological Research 52: 336-342.

Günther A. 1868. Catalogue of the fishes in the British Museum. Catalogue of the Physostomi, containing the families Heteropygii, Cyprinidae, Gonorhynchidae, Hyodontidae, Osteoglossidae, Clupeidae, Hirocentridae, Alepocephalidae, Notopteridae, Halosauridae, in the collection of the British Museum. Volume seventh. Order of the Trustees. London, 512 p.

Hubbs C.L., Lagler K.F. 2004. Fishes of the Great Lakes Region. Revised edition. University of Michigan Press. Michigan. 276 p.

Hosoya K. 1983. Geographic variation of number of vertebrae in Squalidus. The Freshwater Fishes 9: 43-48.

Koller O. 1927. Fische von der Insel Hainan. Annalen des Naturhistorischen Museums in Wien 41: 25-49.

Kottelat M. 2001. Freshwater fishes of northern Vietnam. A preliminary checklist of the fishes known or expected to occur in northern Vietnam with comments on systematics and nomenclature. Environment and Social Development Unit, East Asia and Pacific Region, The World Bank. Washington DC. 123 p.

Kottelat M. 2013. The fishes of the inland waters of Southeast Asia: a catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries. Raffles Bulletin of Zoology 27: 1-663.

Mai D.Y. 1978. Identification of the fresh-water fishes of North Vietnam. Scientific & Technology, Publisher. Ha Noi. 340 p.

Yue P.Q., Chen Y.Y. 1998. China red data book of endangered animals. Pisces. Science Press, Beijing, Hong Kong, New York. 247 p.


  • There are currently no refbacks.