The Continuing Debate on Deep Molluscan Phylogeny: Evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora)
Joint Authors
Stöger, I.
Sigwart, J. D.
Kano, Y.
Knebelsberger, T.
Marshall, B. A.
Schwabe, E.
Schrödl, M.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-18, 18 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-21
Country of Publication
Egypt
No. of Pages
18
Main Subjects
Abstract EN
Molluscs are a diverse animal phylum with a formidable fossil record.
Although there is little doubt about the monophyly of the eight extant classes, relationships between these groups are controversial.
We analysed a comprehensive multilocus molecular data set for molluscs, the first to include multiple species from all classes, including five monoplacophorans in both extant families.
Our analyses of five markers resolve two major clades: the first includes gastropods and bivalves sister to Serialia (monoplacophorans and chitons), and the second comprises scaphopods sister to aplacophorans and cephalopods.
Traditional groupings such as Testaria, Aculifera, and Conchifera are rejected by our data with significant Approximately Unbiased (AU) test values.
A new molecular clock indicates that molluscs had a terminal Precambrian origin with rapid divergence of all eight extant classes in the Cambrian.
The recovery of Serialia as a derived, Late Cambrian clade is potentially in line with the stratigraphic chronology of morphologically heterogeneous early mollusc fossils.
Serialia is in conflict with traditional molluscan classifications and recent phylogenomic data.
Yet our hypothesis, as others from molecular data, implies frequent molluscan shell and body transformations by heterochronic shifts in development and multiple convergent adaptations, leading to the variable shells and body plans in extant lineages.
American Psychological Association (APA)
Stöger, I.& Sigwart, J. D.& Kano, Y.& Knebelsberger, T.& Marshall, B. A.& Schwabe, E.…[et al.]. 2013. The Continuing Debate on Deep Molluscan Phylogeny: Evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora). BioMed Research International،Vol. 2013, no. 2013, pp.1-18.
https://search.emarefa.net/detail/BIM-1004236
Modern Language Association (MLA)
Stöger, I.…[et al.]. The Continuing Debate on Deep Molluscan Phylogeny: Evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora). BioMed Research International No. 2013 (2013), pp.1-18.
https://search.emarefa.net/detail/BIM-1004236
American Medical Association (AMA)
Stöger, I.& Sigwart, J. D.& Kano, Y.& Knebelsberger, T.& Marshall, B. A.& Schwabe, E.…[et al.]. The Continuing Debate on Deep Molluscan Phylogeny: Evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora). BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-18.
https://search.emarefa.net/detail/BIM-1004236
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1004236