alexa The Mitochondrial Genome of Erpobdella octoculata (Hirudinida: Arhynchobdellida), as the First Representative for the Suborder Erpobdelliformes | OMICS International
ISSN: 2329-9002

Journal of Phylogenetics & Evolutionary Biology
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Research Article

The Mitochondrial Genome of Erpobdella octoculata (Hirudinida: Arhynchobdellida), as the First Representative for the Suborder Erpobdelliformes

Yun-Ling Xu1,2, Ling Xiao1 and Jing Nie1*
1Hubei Institute for Food and Drug Control, Wuhan, Hubei Province, 430064, PR China
2College of Pharmaceutical Sciences, Beijing Chinese Medical University, Beijing, 100000, PR China
Corresponding Author : Jing Nie
Hubei Institute for Food and Drug Control
Wuhan, Hubei Province 430064, PR China
Tel: +86 27 8727 0482
E-mail: [email protected]
Received: August 10, 2015 Accepted: September 14, 2015 Published: September 21, 2015
Citation: Xu YL, Xiao L, Nie J (2015) The Mitochondrial Genome of Erpobdella octoculata (Hirudinida:Arhynchobdellida), as the First Representative for the Suborder Erpobdelliformes. J Phylogen Evolution Biol 3:157. doi:10.4172/2329-9002.1000157
Copyright: © 2015 Xu YL, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Erpobdella octoculata Linnaeus, 1758 (Hirudinea: Arhynchobdellida: Erpobdellidae) is a very common and morphologically variable macrophagous predators of aquatic invertebrates. Here we determined the complete mitochondrial DNA (mtDNA) sequence of this species, as the first representative of the suborder Erpobdelliformes. This genome is 14,407 bp in length with an A+T content of 71.55%, containing 37 typical animal mitochondrial genes and a non-coding region (NCR). All genes were arranged in the same order as most reported annelid. A remarkable strand bias found for all protein coding genes (PCGs) was positive AT-skew and negative GC-skew. The models of secondary structures for the two rRNA genes of this species were predicted. rrnL consisted of six domains and 46 helices, while three domains and 34 helices for rrnS. The secondary structures of some transfer RNA genes were relatively special. Bayesian phylogenetic and maximum likelihood analyses, based on concatenated nucleotide sequences of 12 PCGs, placed E. octoculata within the suborder Hirudiniformes, and the relationships depicted within that order were not quite in agreement with previous morphological classifications. The complete mtDNA sequence of E. octoculata provides important genetic markers for identification, ecological and evolutionary studies of leeches.

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