Comparative studies on DNA nucleotide sequences have revolutionized our understanding of the phylogenetic relationships of many organisms and have become an important tool in evolutionary, ecological and palaeobiological inquiry. We have analysed partial small-subunit 18S sequences (srDNA) of Elphidium williamsoni (Haynes, 1973), a common intertidal benthic foraminiferid from the North Sea. The molecular phylogenetic analysis of the ribosomal rDNA sequence data indicate that E. williamsoni constitutes a well-defined genetic entity that is closely related to Elphidium aculeatum.
Elphidium williamsoni is a prominent and frequently encountered foraminiferid in the North Sea and other tidal flats. It was originally described...
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