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Phylogenomics reveals deep molluscan relationships
Kocot, K.M.; Cannon, J.T.; Todt, C.; Citarella, M.R.; Kohn, A.B.; Meyer, A.; Santos, S.R.; Schander , C.; Moroz, L.L.; Lieb, B.; Halanych, K.M. (2011). Phylogenomics reveals deep molluscan relationships. Nature (Lond.) 477(7365): 452-456.
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

    Biogeny > Phylogeny
    Mollusca [WoRMS]
    Marien; Brak water; Zoet water; Terrestrisch

Auteurs  Top 
  • Kocot, K.M.
  • Cannon, J.T.
  • Todt, C.
  • Citarella, M.R.
  • Kohn, A.B.
  • Meyer, A.
  • Santos, S.R.
  • Schander, C.
  • Moroz, L.L.
  • Lieb, B.
  • Halanych, K.M.

    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.

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