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Date: December 2010
Pub: Mitochondrial DNA, 2010, Vol. 21 No. S1: 24-29
Author(s): Alejandro Oceguera-Figueroa, Virginia León-Règagnon, Mark E. Siddall
We investigated the genetic distances and taxonomic status among species of Helobdella, a genus of non-blood-feeding leeches, based on mitochondrial cytochrome c oxidase subunit I sequences. Sampling included 20 specimens representing nine nominal species collected in 11 states in Mexico as well as previously published sequences of different species of Helobdella from several places. A neighbor-joining tree, as well as identification of diagnostic nucleotides, was used to suggest the presence of seven species of Helobdella in Mexico including potentially two undescribed forms.