对拟细鲫(Nicholsicypris normalis)与瑶山鲤(Yaoshanicus arcus)的比较和澄清

COMPARISON AND CLARIFICATION BETWEEN NICHOLSICYPRIS NORMALIS AND YAOSHANICUS ARCUS

在形态和解剖上对拟细鲫和瑶山鲤做了比较 ,得出这两个种是真实有效但需重新界定 .认为身体细长、胸腹面平直、瞳孔通常较大、侧线以上鳞片有显著月牙形黑斑、肠管较细、肠壁较厚、肠盘曲紧密、下咽骨较细小为拟细鲫 ;身体为长形、体很侧扁、胸腹部很突出、瞳孔较小、身体侧面鳞片无显著黑斑、肠管较粗、肠壁薄、肠盘曲松弛、下咽骨粗壮的为瑶山鲤 .从而对多年来在这两者分类上出现的混乱情况给予了澄清 .

By carefully comparing the morphology and anatomy of Nicholsicypris normalis and Yaoshanicus arcus (Teleostei: Cyprinidae), it was found that Nichosicypris normalis is elongated, the ventral outline is flat, the pupils are usually big, most scales on and above lateral line are edged narrowly with dark crescent-shaped patches. Though Yaoshanicus arcus is oblong, very compressed, ventral outline on thorax is very arched, pupils are small, mouth is strongly oblique, without prominent dark crescent-shaped patch on scales. The taxonomic confusion between these two species on many monographs is clarified.