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A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)

Home Forums Ichthyology A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)

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    Matt
    Keymaster

    Zootaxa 3768(5)

    Abstract

    One new species is added to the genus Sinocyclocheilus, the largest cyprinid genus in China and the largest cavefish genus
    in the world. Sinocyclocheilus gracilicaudatus sp. nov. is similar to S. donglanensis but differs to other congeners in having
    normal eyes and scaled body, curved lateral line with 59–64 lateral-line scale rows, half-hard dorsal fin spine, 8 gill
    rakers and 8 predorsal vertebrae. Compared to S. donglanensis, the new species has a longer and more narrow caudal peduncle
    (caudal peduncle length 21.3-22.7% vs. 16.8–20.4% of SL; caudal peduncle depth 10.5–12.0% vs. 12.5–15.5% of
    SL), smaller eyes (eye diameter 5.8–8.3% vs. 6.5–10.9% of SL) and longer barbels (maxillary barbel length 16.6–24.3%
    vs. 11.1–21.1 % of SL; rictal barbel length 19.5–21.6% vs. 11.3–21.1% of SL). The new species is distributed in a subterranean
    river, belonging to the Longjiang River system; S. donglanensis occurs in the Hongshuihe River system, a system
    separate from that where the former species occurs.

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