observations on the morphology, systematics, and biogeography of the genus truttaedacnitis (nematoda:cucullanidae). | all species of truttaedacnitis petter, 1974, were examined for a phylogenetic analysis. morphological studies showed that truttaedacnitis truttae (fabricius, 1794) from north america possessed a reduced button-shaped or nipple-shaped caudal mucron that is in contrast to the sharp spike-shaped mucron commonly reported in eurasian specimens. histological studies showed that the excretory pore in truttaedacnitis sphaerocephala (rudolphi, 1809) was situated near the level of the pseudobuccal capsule ... | 1996 | 8973409 |