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.
Neotropical Entomology – Springer Journals
Published: Feb 7, 2017
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