MBE Advance Access published online on December 5, 2003
Molecular Biology and Evolution, doi:10.1093/molbev/msh016
Molecular Biology and Evolution © Society for Molecular Biology and Evolution 2003; all rights reserved
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1 Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal, 2, 28006, Madrid Spain
* To whom correspondence should be addressed. E-mail: cristina{at}mncn.csic.es.
A new phylogenetic hypothesis for Euthyneura is proposed based on the analysis of primary sequence data (mitochondrial cox1, trnV, rrnL, trnL(cun), trnA, trnP, nad6, and nad5 genes) and the phylogenetic utility of two rare genomic changes (the relative position of the mitochondrial trnP gene, and an insertion/deletion event in a conserved region of the mitochondrial Cox1 protein) is addressed. Both sources of phylogenetic information clearly rejected the monophyly of pulmonates, a group of gastropods well supported so far by morphological evidence. The marine basommatophoran pulmonate Siphonaria was placed within opisthobranchs and shared with them the insertion of a Glycine in the Cox 1 protein. The marine systellommatophoran pulmonate Onchidella was recovered at the base of the opisthobranch + Siphonaria clade. Opisthobranchs, Siphonaria, and Onchidella shared the relative position of the mitochondrial trnP gene between the mitochondrial trnA and nad6 genes. The land snails and slugs (stylommatophoran pulmonates) were recovered as an early split in the phylogeny of advanced gastropods. The monophyly of the Euthyneura (Opisthobranchia + Pulmonata) was rejected by the inclusion of the heterostrophan Pyramidella. Key Words:
Opisthobranchia, Pulmonata, indels, gene arrangement, mtDNA
© 2003 Society for Molecular Biology and Evolution
Original Articles
Molecular Phylogeny of Euthyneura (Mollusca: Gastropoda)
2 Departamento de Biología, Facultad de Ciencias del Mar, Universidad de Cádiz, Polígono del Río San Pedro s/n, Puerto Real, 11510 Cádiz, SPAIN
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