Article
Dicyema Pax6 and Zic: tool-kit genes in a highly simplified bilaterian.
BMC evolutionary biology - 25 Oct 2007
Aruga Jun, Odaka Yuri S, Kamiya Akiko, Furuya Hidetaka
Abstract excerpt
BACKGROUND: Dicyemid mesozoans (Phylum Dicyemida) are simple (8-40-cell) cephalopod endoparasites. They have neither body cavities nor differentiated organs, such as nervous and gastrointestinal systems. Whether dicyemids are intermediate between Protozoa and Metazoa (as represented by their "Mesozoa" classification) or degenerate species of more complex metazoans is controversial. Recent molecular phylogenetic...
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