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Citation for Study 11512

About Citation title: "A molecular paleobiological hypothesis to the origin of aplacophorans and their derivation from chiton-like ancestors".
About Study name: "A molecular paleobiological hypothesis to the origin of aplacophorans and their derivation from chiton-like ancestors".
About This study is part of submission 11502 (Status: Published).

Citation

Vinther J., Sperling E.A., Briggs D.E., & Peterson K.J. 2011. A molecular paleobiological hypothesis to the origin of aplacophorans and their derivation from chiton-like ancestors. Proceedings of the Royal Society B, .

Authors

  • Vinther J. (submitter) Phone 2038238483
  • Sperling E.A.
  • Briggs D.E.
  • Peterson K.J.

Abstract

Aplacophorans and polyplacophorans (chitons) have long been argued to be basal molluscs. We present a molecular phylogeny including the aplacophorans Neomeniomorpha (Solenogastres) and Chaetodermomorpha (Caudofoveata). Our analysis recovered instead the clade Aculifera (Aplacophora + Polyplacophora). A relaxed Bayesian molecular clock estimates an Early Ordovician appearance of the aculiferan crown group. This is consistent with the presence of chiton-like molluscs (paleoloricates) with seven or eight dorsal shell plates, interpreted to be ancestral to both chitons and aplacophorans, in the Late Cambrian (~501-490 million years ago). Molecular, embryological and palaeontological data indicate that the aplacophorans evolved from chiton-like ancestors. The recovery of cephalopods as a sistergroup to aculiferans suggests that the plesiomorphic condition in molluscs might be a morphology similar to monoplacophoran limpets.

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S11512
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