| the origin of lecithodesmus (digenea: campulidae) based on nd3 gene comparison. | species of lecithodesmus (campulidae) occur almost exclusively in baleen whales throughout a wide geographical distribution. other campulids occur only in odontocetes and, secondarily, in pinnipeds and the sea otter. therefore, the ancestor of lecithodesmus might have either cospeciated with mysticetes during the early divergence of mysticete and odontocete cetaceans or originated later via host switching. we evaluate both possibilities based on a phylogenetic analysis. the nd3 mitochondrial gen ... | 2000 | 10958470 |