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Evolutionary Relations of Hexanchiformes Deep-Sea Sharks Elucidated by Whole Mitochondrial Genome Sequences
- Source :
- BioMed Research International, Vol 2013 (2013), BioMed Research International
- Publication Year :
- 2013
- Publisher :
- Hindawi Limited, 2013.
-
Abstract
- Hexanchiformes is regarded as a monophyletic taxon, but the morphological and genetic relationships between the five extant species within the order are still uncertain. In this study, we determined the whole mitochondrial DNA (mtDNA) sequences of seven sharks including representatives of the five Hexanchiformes, one squaliform, and one carcharhiniform and inferred the phylogenetic relationships among those species and 12 other Chondrichthyes (cartilaginous fishes) species for which the complete mitogenome is available. The monophyly of Hexanchiformes and its close relation with all other Squaliformes sharks were strongly supported by likelihood and Bayesian phylogenetic analysis of 13,749 aligned nucleotides of 13 protein coding genes and two rRNA genes that were derived from the whole mDNA sequences of the 19 species. The phylogeny suggested that Hexanchiformes is in the superorder Squalomorphi,Chlamydoselachus anguineus(frilled shark) is the sister species to all other Hexanchiformes, and the relations within Hexanchiformes are well resolved asChlamydoselachus, (Notorynchus, (Heptranchias, (Hexanchus griseus,H. nakamurai))). Based on our phylogeny, we discussed evolutionary scenarios of the jaw suspension mechanism and gill slit numbers that are significant features in the sharks.
- Subjects :
- Gills
food.ingredient
Article Subject
lcsh:Medicine
Zoology
DNA, Mitochondrial
General Biochemistry, Genetics and Molecular Biology
Squaliformes
Monophyly
food
Gill slit
Animals
Phylogeny
General Immunology and Microbiology
biology
lcsh:R
High-Throughput Nucleotide Sequencing
Hexanchiformes
General Medicine
biology.organism_classification
Biological Evolution
Jaw
Genome, Mitochondrial
Sharks
Chlamydoselachus anguineus
Hexanchus
Notorynchus
Chlamydoselachus
Research Article
Subjects
Details
- ISSN :
- 23146141 and 23146133
- Volume :
- 2013
- Database :
- OpenAIRE
- Journal :
- BioMed Research International
- Accession number :
- edsair.doi.dedup.....87c87ee5ea4e097bf78301dc72181371