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J Fish Biol. 2018 Feb;92(2):347-364. doi: 10.1111/jfb.13498.

Saurogobio punctatus sp. nov., a new cyprinid gudgeon (Teleostei: Cypriniformes) from the Yangtze River, based on both morphological and molecular data.

Author information

1
The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Hubei, Wuhan, 430072, P. R. China.
2
College of Fisheries, Huazhong Agricultural University, Hubei, Wuhan, 430070, P. R. China.
3
Department of Ecology and Evolutionary Biology, University of Connecticut, 75 N. Eagleville Road, Storrs, CT, 06269-3043, U.S.A.
4
Department of Biology, Baylor University, One Bear Place #97388, Waco, TX, 76798, U.S.A.

Abstract

A new cyprinid gudgeon, Saurogobio punctatus sp. nov., is described based on specimens collected from the Yangtze River, China. The new species can be distinguished from its congeners by differences in both morphology and the cytochrome b (cytb) gene sequence. Numerous minute blackish spots are scattered on dorsal and caudal fins in S. punctatus sp. nov. v. absent in the other seven valid Saurogobio species. The new species can be further distinguished from its congeners by the following unique combination of characters: a dorsal fin with eight branched rays; absence of scales in chest area before pectoral origin; upper and lower lips thick, covered with papillae; and a papillose mental pad approximately triangular. Morphologically, the new species most resembles the Chinese lizard gudgeon Saurogobio dabryi, but the new species lays yellowish adhesive eggs v. white pelagic eggs in S. dabryi. A phylogenetic analysis of all Saurogobio species based on cytb gene sequences indicated that S. punctatus sp. nov was distinctly separated from its congeners, with mean sequence divergence ranging from 12·6 to 21·0%. Therefore, molecular data further supported the distinctiveness of the new species.

KEYWORDS:

Saurogobio; morphological difference; new species; phylogenetic analysis; sequence divergence

PMID:
29431222
DOI:
10.1111/jfb.13498
[Indexed for MEDLINE]

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