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.

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.