醒斑银弄蝶Carterocephalus alcina Evans, 1939与其近似种(鳞翅目: 弄蝶科: 链弄蝶亚科)的关系

目的 探讨醒斑银弄蝶Carterocephalus alcina Evans, 1939与其近似种的关系。方法 广泛采集醒斑银弄蝶及其近似种样本，基于形态特征、COI条形码及地理分布进行关系分析。结果 黄斑银弄蝶C. alcinoides Lee, 1962应是醒斑银弄蝶C. alcina的个体变异，故为其新异名；产自北京的2个银弄蝶标本与其近似种间的最小平均遗传距离为3.9%，在系统树上独立成支，前翅中室基部和后翅前缘中部有斑且后翅M_1-2室斑延伸至外缘，为其独有；醒斑银弄蝶、北京支系、银弄蝶C. palaemon和黄翅银弄蝶C. silvicola呈高度支持的单系支。结论 黄斑银弄蝶是醒斑银弄蝶的新异名；产自北京的近似于醒斑银弄蝶的种群是一个新种，即长斑银弄蝶Carterocephalus longimaculatus Hou, Fan & Li sp. nov.。

The relationships of Carterocephalus alcina Evans, 1939 and relatives (Lepidoptera: Hesperiidae: Heteropterinae)

Objective To investigate the relationships of Carterocephalus alcina Evans, 1939 and its relatives.Method The relationships of C. alcina and its relatives were analyzed based on morphological characters, COI barcodes and geographical distribution using an extensive sample collection.Result C. alcinoides Lee, 1962 is only an individual variation of C. alcina, and therefore it is a new synonym of C. alcina. The minimum mean genetic distance between the two samples from Beijing and relatives is 3.9%, and they form a distinct clade in the phylogenetic tree. They are characterized by the presence of spots at the base of the discoidal cell of the forewing upperside and in the middle of the leading edge of the hindwing as well as the spot of M_1-2 cells extending to the submarginal zone on the hindwing upperside. C. alcina, the clade composed of two samples from Beijing, C. palaemon and C. silvicola are recovered as a strongly supported monophyletic clade.Conclusion C. alcinoides is a new junior synonym of C. alcina. The population which has been known as C. alcina from Beijing is actually a new species, C. longimaculatus Hou, Fan & Li sp. nov..