Molecular phylogeny and node time estimation of bioluminescent Lantern Sharks (Elasmobranchii: Etmopteridae).

TitreMolecular phylogeny and node time estimation of bioluminescent Lantern Sharks (Elasmobranchii: Etmopteridae).
Type de publicationJournal Article
Year of Publication2010
AuteursStraube, N, Iglesias, S, Sellos, DY, Kriwet, J, Schliewen, UK
JournalMol Phylogenet Evol
Date Published2010 Sep
Mots-clésAnimals, Bayes Theorem, Cell Nucleus, DNA, Mitochondrial, Evolution, Molecular, Fossils, Genes, RAG-1, Likelihood Functions, Models, Genetic, Phylogeny, Sequence Alignment, Sequence Analysis, DNA, Sharks

Deep-sea Lantern Sharks (Etmopteridae) represent the most speciose family within Dogfish Sharks (Squaliformes). We compiled an extensive DNA dataset to estimate the first molecular phylogeny of the family and to provide node age estimates for the origin and diversification for this enigmatic group. Phylogenetic inferences yielded consistent and well supported hypotheses based on 4685bp of both nuclear (RAG1) and mitochondrial genes (COI, 12S-partial 16S, tRNAVal and tRNAPhe). The monophyletic family Etmopteridae originated in the early Paleocene around the C/T boundary, and split further into four morphologically distinct lineages supporting three of the four extant genera. The exception is Etmopterus which is paraphyletic with respect to Miroscyllium. Subsequent rapid radiation within Etmopterus in the Oligocene/early Miocene was accompanied by divergent evolution of bioluminescent flank markings which morphologically characterize the four lineages. Higher squaliform interrelationships could not be satisfactorily identified, but convergent evolution of bioluminescence in Dalatiidae and Etmopteridae is supported.

Alternate JournalMol. Phylogenet. Evol.
Identifiant (ID) PubMed20457263