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 Mattern, D. and M. Schlegel (2001) Molecular evolution of the small subunit ribosomal DNA in woodlice (Crustacea, Isopoda, Oniscidea) and implications for oniscidean phylogeny. Molecular Phylogenetics and Evolution 18(1): 54–65.


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2007-06-26 Regina Wetzer add abstract

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Reference ID 4911
Reference type journalarticle
Authors Mattern, D.
Schlegel, M.
Publication Year (for display) 2001
Publication Year (for sorting) 2001
Title Molecular evolution of the small subunit ribosomal DNA in woodlice (Crustacea, Isopoda, Oniscidea) and implications for oniscidean phylogeny
Secondary Title Molecular Phylogenetics and Evolution
Secondary Authors  
Tertiary Title  
Tertiary Authors  
Volume 18
Issue 1
Pages 54–65
Place published  
The small subunit ribosomal DNA (ssu rDNA) of 13 isopods was sequenced. The entire length of the ribosomal gene is unusually long, resulting from the presence of five expansion elements accounting for more than 40% of the gene. We found that in terrestrial isopods the length of the ssu rDNA ranges from 2414 bp (Ligidium hypnorum) to 3537 bp (Cubaris murina). This is the longest metazoan ssu rDNA reported to date. The conserved regions are highly informative for analysis of the early nodes of the tree, whereas the variable expansion elements are better suited to reconstruction of the branching pattern between closely related taxa. The suggested relationship among Synochaeta, Crinochaeta, and Diplochaeta based on the conserved regions confirms that based on previous morphological analyses. In contrast, the phylogeny within the Crinochaeta based on the entire ssu rDNA including the variable domains is in conflict with that based on most of the morphological analyses. The phylogenetic analyses of the ssu rDNA support a repeated independent evolution of the three different types of pleopodal lungs in the Crinochaeta.
Keywords ligidium hyponorum cubaris murina
Reference Contributor Tag rwetzer
Last Changed Wed Dec 5 10:57:31 2012

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