| phylogenetic relationships of the family campulidae (trematoda) based on 18s rrna sequences. | traditionally, the family campulidae has been associated either with the family fasciolidae, parasites of ruminants, or the acanthocolpidae, parasites of fishes, based on morphological similarities. since morphology does not seem to resolve clearly the problem of the relationships of campulids, we have used the sequences of the 18s rrna gene of the campulids zalophotrema hepaticum, campula oblonga and nasitrema globicephalae, the fasciolid fasciola hepatica, the acanthocolpid stephanostomum bacc ... | 1998 | 9820860 |