Abstract:
:We present the most comprehensive time-calibrated, species-level hypothesis of the timing of Acanthuridae (surgeonfishes and allies) evolution based on 76% of the extant diversity and nine genes. We recover two major acanthurid clades, Nasinae and Acanthurinae, and infer a much more recent Nasinae crown age (17 Ma) compared to a previous dating study for Naso. The Acanthurinae represent an older group that originated ~42 Ma, with most diversification occurring since the Early Miocene (beginning ~21 Ma). Our results strongly support a paraphyletic Acanthurus and Ctenochaetus, with multiple analyses recovering a clade grouping Ctenochaetus, A. nubilus and A. pyroferus. Contrary to previous studies, we also provide strong evidence that thick-walled, gizzard-like stomachs evolved only once within Acanthurus and that this morphology has a common origin in Acanthurus and Ctenochaetus. Based on our molecular analyses, in conjunction with the large body of morphological evidence, we recommend dissolving the genus Ctenochaetus into the genus Acanthurus.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Sorenson L,Santini F,Carnevale G,Alfaro MEdoi
10.1016/j.ympev.2013.03.014subject
Has Abstractpub_date
2013-07-01 00:00:00pages
150-60issue
1eissn
1055-7903issn
1095-9513pii
S1055-7903(13)00115-2journal_volume
68pub_type
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