Mollaret, I., Jamieson, B.G.M.,
Adlard, R.D., Hugall,
A., Lecointre, G., Chombard, C. and Justine, J.-L. 1997h.
Phylogenetic
analysis of the Monogenea and their relationships with Digenea and
Eucestoda inferred from 28S rDNA sequences. Molecular and
Biochemical Parasitology 90, 433-438.
Platyhelminth phylogeny is controversial.
Phylogenetic analyses of the partial domain C1 and the full domains D1
and C2
(358 nucleotides) from the 28S ribosomal RNA gene for 21 species from
the
Monogenea, Digenea, Cestoda, and, as the outgroup, Tricladida reveal
major
departures from prevailing theory. The Digenea and not the Monogenea
(Monopisthocotylea and Polyopisthocotylea) form the sister group of the
cestodes; the Monopisthocotylea and Polyopisthocotylea are each
monophyletic,
but the Monogenea do not form a monophylum; the sister group of the
Digenea +
Cestoda is the Polyopisthocotylea; and Monopisthocotylea are the sister
group
of all other parasitic flatworms.