Rivera-Gasperín S L, Morón Rios M A
Instituto de Ecología A.C., El Haya, 91070, Xalapa, Veracruz, Mexico.
Neotrop Entomol. 2017 Oct;46(5):524-536. doi: 10.1007/s13744-017-0482-6. Epub 2017 Feb 7.
As partial results of a long-term project for the revision of the supraspecific classification of the American Melolonthini, using phylogenetic methods, interesting information on the relationships between the subgeneric groups of Phyllophaga Harris proposed by Saylor were obtained. The genus Listrochelus was described by Blanchard in 1851. However, in 1940, Saylor reduced it as a subgenus of Phyllophaga. The objective of the present study is to confirm the monophyly of Listrochelus by means of a phylogenetic analysis. A total of 132 species were analyzed; 31 species of them belong to Listrochelus, 76 are from other groups of Phyllophaga, and 25 species are from the outgroup. A morphological matrix with 281 characters was codified. A traditional search with 1000 iterations was performed in TNT. Branch support was investigated using the bootstrap method. Parsimony analysis resulted in ten equally parsimonious trees. The topology obtained in the strict consensus tree shows that the limits of Listrochelus are very clear (bootstrap 99%), supported by five synapomorphies and a combination of eight character states that are not exclusive to the group. Based on the hypothesis obtained, the restitution of the genus Listrochelus is proposed.
作为一项运用系统发育方法对美洲鳃金龟超种分类进行修订的长期项目的部分成果，获得了关于塞勒提出的哈里斯鳃金龟亚属组间关系的有趣信息。Listrochelus属由布兰查德于1851年描述。然而，1940年塞勒将其降为鳃金龟属的一个亚属。本研究的目的是通过系统发育分析来确认Listrochelus的单系性。共分析了132个物种；其中31个物种属于Listrochelus，76个来自鳃金龟属的其他组，25个物种来自外类群。编制了一个具有281个性状的形态矩阵。在TNT中进行了1000次迭代的传统搜索。使用自展法研究分支支持率。简约分析得到了十棵同等简约的树。严格合意树中获得的拓扑结构表明Listrochelus的界限非常清晰（自展支持率99%），由五个共衍征和八个并非该类群独有的性状状态组合所支持。基于所获得的假设，建议恢复Listrochelus属。
