| phylogenetic relationships among selected heteroderoidea based on 18s and its ribosomal dna. | in a study of relationships among selected cyst-forming and noncyst-forming species of heteroderoidea, combined sequences comprised of dna from part of the conserved 18s ribosomal rna gene (rdna) plus the complete its rdna segment were more similar to analyses based on the its data alone than to analyses based on the 18s data alone. one of the two noncyst-forming species, ekphymatodera thomasoni, grouped with cyst-forming species of heteroderoidea. bilobodera flexa, also a noncyst-forming specie ... | 2004 | 19262808 |