摘要
基于形态学研究和DNA条形码鉴定,研究了中国蓼龟象属Phytobius Schoenherr,1833昆虫(龟象亚科:蓼龟象族)的种类。研究发现该属模式种白腹蓼龟象P.leucogaster(Marsham,1802)为中国新纪录种,分布北京、天津;短喙蓼龟象P.friebi Wagner,1939在中国东部地区的分布更为广泛,尽管其南北地理种群(浙江、黑龙江)在外部形态特征上存在一定的差异,但COI基因序列的遗传距离和系统发育分析均支持为1个物种。文中记述该属的寄主植物为蓼科植物水蓼Polygonum hydropiper L.,并提供了2种蓼龟象的详细形态特征照片与地理分布图。
The genus Phytobius Schoenherr, 1833(Ceutorhynchinae: Phytobiini) from China was revised on the basis of morphological observations and barcode identification. The distribution of the type species P.leucogaster(Marsham, 1802) in China was confirmed for the first time, based on specimens collected from Beijing and Tianjin. Another species, P. friebi Wagner, 1939 was found widely distributed along the east coast of China. The morphologically varied populations from the north(Heilongjiang) and south(Zhejiang) are suggested to be the same species based on the genetic divergence and phylogeny analysis of CO1 sequences.The plant association of the species with Polygonum hydropiper L.(Polygonaceae) was discovered. Habitus photographs, illustrations of important characters, distribution map, and a key to both species are provided.
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