Complete Mitochondrial DNA of the Hagfish, Eptatretus burgeri: The Comparative Analysis of Mitochondrial DNA Sequences Strongly Supports the Cyclostome Monophyly
Authors: Delarbre C.1; Gallut C.2; Barriel V.2; Janvier P.3; Gachelin G.1
Source: Molecular Phylogenetics and Evolution, Volume 22, Number 2, February 2002 , pp. 184-192(9)
Publisher: Academic Press
- Free Content
- New Content
- Subscribed Content
- Free Trial Content
Abstract:
The phylogenetic position of cyclostomes, i.e., the relationships between hagfishes, lampreys, and jawed vertebrates is an unresolved problem. Anatomical data support the paraphyly of cyclostomes, whereas nuclear genes data support monophyly of cyclostomes. Previous results obtained using mitochondrial DNA are ambiguous, presumably due to a lack of informative sequences. By adding the complete mtDNA of a hagfish, Eptatretus burgeri, we have generated a novel data set for sequences of hagfishes and of lampreys. The addition of this mtDNA sequence to the 12 taxa we have already used becomes sufficient to obtain unambiguous results. This data set, which includes sequences of mtDNA of animals closely related to the lamprey/hagfish node, was used in a phylogenetic analysis with two independent statistical approaches and unequivocally supported the monophyly of cyclostomes. Thus molecular data, i.e., our results and those obtained using nuclear genes, conclude that hagfishes and lampreys form a clade. ©2002 Elsevier Science (USA).
Keywords: mitochondrial DNA; hagfish; Eptatretus; phylogeny
Language: English
Document Type: Research article
Affiliations: 1: Unité de Biologie Moléculaire du Gène, Institut Pasteur, Paris Cedex 15, 75724, France 2: Service de Systématique Moléculaire, Muséum National d'Histoire Naturelle, Paris, 75005, France 3: Laboratoire de Paléontologie, Muséum National d'Histoire Naturelle, Paris, 75005, France
- Free Content
- New Content
- Subscribed Content
- Free Trial Content
Click here for Page Help