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湖南通道发现岜沙掌突蟾
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Journal Article
湖南通道发现岜沙掌突蟾
2026
Overview
2024年9月，在湖南省怀化市通道侗族自治县万佛山镇上洞村采集到2号角蟾科（Megophryidae）掌突蟾属（Leptobrachella）标本。经形态学鉴定，其形态特征与岜沙掌突蟾（L. bashaensis）相符。基于线粒体16S rRNA基因序列构建的系统发育分析表明，该标本与来自模式产地（贵州从江）的岜沙掌突蟾聚为一支；二者基于Kimura双参数模型计算的遗传距离为1.9%，远低于掌突蟾属的种间遗传距离平均值（10.3%）。综合形态学特征与分子系统发育分析结果，确认该标本为岜沙掌突蟾，系湖南省两栖动物分布新纪录种。此项发现不仅丰富了湖南省两栖动物区系数据，也将该物种的已知分布范围向东北扩展了约100 km。
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