Publication Date:
2011-09-06
Description:
Evolutionary relationships among the eight major lineages of Mollusca have remained unresolved despite their diversity and importance. Previous investigations of molluscan phylogeny, based primarily on nuclear ribosomal gene sequences or morphological data, have been unsuccessful at elucidating these relationships. Recently, phylogenomic studies using dozens to hundreds of genes have greatly improved our understanding of deep animal relationships. However, limited genomic resources spanning molluscan diversity has prevented use of a phylogenomic approach. Here we use transcriptome and genome data from all major lineages (except Monoplacophora) and recover a well-supported topology for Mollusca. Our results strongly support the Aculifera hypothesis placing Polyplacophora (chitons) in a clade with a monophyletic Aplacophora (worm-like molluscs). Additionally, within Conchifera, a sister-taxon relationship between Gastropoda and Bivalvia is supported. This grouping has received little consideration and contains most (〉95%) molluscan species. Thus we propose the node-based name Pleistomollusca. In light of these results, we examined the evolution of morphological characters and found support for advanced cephalization and shells as possibly having multiple origins within Mollusca.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4024475/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4024475/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kocot, Kevin M -- Cannon, Johanna T -- Todt, Christiane -- Citarella, Mathew R -- Kohn, Andrea B -- Meyer, Achim -- Santos, Scott R -- Schander, Christoffer -- Moroz, Leonid L -- Lieb, Bernhard -- Halanych, Kenneth M -- 1R01GM097502/GM/NIGMS NIH HHS/ -- 1R01NS06076/NS/NINDS NIH HHS/ -- R01 GM097502/GM/NIGMS NIH HHS/ -- R01 NS039103/NS/NINDS NIH HHS/ -- R21 DA030118/DA/NIDA NIH HHS/ -- R21 RR025699/RR/NCRR NIH HHS/ -- R21DA030118/DA/NIDA NIH HHS/ -- England -- Nature. 2011 Sep 4;477(7365):452-6. doi: 10.1038/nature10382.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Auburn University, 101 Rouse Life Sciences, Auburn, Alabama 36849, USA. kmkocot@auburn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21892190" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Bivalvia/anatomy & histology/classification/genetics
;
Expressed Sequence Tags
;
Gastropoda/anatomy & histology/classification/genetics
;
Gene Expression Profiling
;
Genes
;
Genome/*genetics
;
Genomics
;
Models, Biological
;
Mollusca/anatomy & histology/*classification/*genetics
;
*Phylogeny
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
