Six species from the species-rich taxon Tisbe (Copepoda, Harpacticoida) were selected that could be reared in the laboratory as mass cultures . Phylogenetic relationships among these species were assessed by morphological studies of adults and larvae, DNA restriction site polymorphisms, allozymic, immunological distance, and lipid composition . Limits of scope and practicability of these analyses became apparent, as well as their potential and
importance for future work in zoological systematics .