| evolution of the major lineages of tapeworms (platyhelminthes: cestoidea) inferred from 18s ribosomal dna and elongation factor-1alpha. | the interrelationships of the tapeworms (platyhelminthes: cestoidea) were inferred by analysis of complete gene sequences (approximately 2,200 bp) of 18s small subunit ribosomal dna (18s) and partial gene sequences (approximately 900 bp) of elongation factor-1alpha (ef-1alpha). new collections were made of 23 species representing each of the 14 currently recognized orders of tapeworms, including the amphilinidea, gyrocotylidea, and the 12 orders of the eucestoda. sequences were determined direct ... | 1999 | 10647048 |