| multivariate analyses of morphometrical features from apatemon gracilis (rudolphi, 1819) szidat, 1928 and a.annuligerum (v.nordman, 1832) (digenea: strigeidae) metacercariae. | only two species of the strigeid subgenus apatemon (apatemon) sensu sudarikov (1959), apatemon gracilis (rudolhi, 1819) and a. annuligerum (von nordmann, 1832), are known to infect british fishes. a. annuligerum is poorly characterised, with few life-cycle data available, since only the adult and metacercarial stages have been described. both of these life-stages demonstrate only minor morphological differences from those of a. gracilis. the multidimensional approach of principal components anal ... | 2002 | 11922047 |