Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 56, Issue 3, Pages 905-917Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2010.04.042
Keywords
Squaliformes; Phylogenetics; Molecular clock; Cryptic diversity; Deep-sea
Funding
- German Research Foundation D.F.G. [KR 2307-4, SCHL 567-3]
- Structuring the European Research Area
- PPF Etat et structure phylogenetique de la biodiversite actuelle et fossile
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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 4685 bp 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. (C) 2010 Elsevier Inc. All rights reserved.
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