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+[[!meta title="Evolutionary history of free-swimming and sessile lifestyles in urochordates as deduced from 18S rDNA molecular phylogeny."]]
+[[!tag Oikopleura]]
+
+Wada H.
+
+Mol Biol Evol. 1998 Sep;15(9):1189-94. doi:10.1093/oxfordjournals.molbev.a026026
+
+Evolutionary history of free-swimming and sessile lifestyles in urochordates as deduced from 18S rDNA molecular phylogeny.
+
+[[!pmid 9729883 desc="Phylogenetic study that places _Oikopleura_ at the base of the tunicate tree. Two _Oikopleura_ 18S sequences were recovered from screening an _O. dioica_ genomic DNA library: a major one (7/8 clones, AB013014), labelled as _O. dioica_ and a minor (1/8 clones, AB013015), interpreted as a contamination an unknown species similar to the one of D14366."]]