Abstract:
:Despite huge fossil, morphological and molecular data, bivalves' early evolutionary history is still a matter of debate: recently, established phylogeny has been mostly challenged by DNA studies, and little agreement has been reached in literature, because of a substantial lack of widely-accepted methodological approaches to retrieve and analyze bivalves' molecular data. Here we present a molecular phylogeny of the class based on four mitochondrial genes (12s, 16s, cox1, cytb) and a methodological pipeline that proved to be useful to obtain robust results. Actually, best-performing taxon sampling and alignment strategies were tested, and several data partitioning and molecular evolution models were analyzed, thus demonstrating the utility of Bayesian inference and the importance of molding and implementing non-trivial evolutionary models. Therefore, our analysis allowed to target many taxonomic questions of Bivalvia, and to obtain a complete time calibration of the tree depicting bivalves' earlier natural history main events, which mostly dated in the late Cambrian.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Plazzi F,Passamonti Mdoi
10.1016/j.ympev.2010.08.032subject
Has Abstractpub_date
2010-11-01 00:00:00pages
641-57issue
2eissn
1055-7903issn
1095-9513pii
S1055-7903(10)00366-0journal_volume
57pub_type
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