DNA barcoding reveals Mexican diversity within the freshwater leech genus Helobdella

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.

Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.

DNA barcoding reveals seven Helobdella species in Mexico, including two potentially undescribed forms — expanding known North American freshwater leech diversity.

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