Phylogenetic hypotheses , taxa and nomina in zoology *

............................................................................................................................................................................ 52 Printing conventions .......................................................................................................................................................... 52 A preliminary statement .................................................................................................................................................... 52 Taxonomy and nomenclature ............................................................................................................................................ 53 Categories and ranks .......................................................................................................................................................... 54 Are nomenclatural ranks useful or harmful? ..................................................................................................................... 55 The equivalence of taxa referred to the same taxonomic category ................................................................................... 56 Taxonomic categories ........................................................................................................................................................ 58 Nomenclatural hierarchy: the Principle of Coordination .................................................................................................. 59 Monosemic and polysemic nomenclatural systems .......................................................................................................... 61 Definitions of taxa ............................................................................................................................................................. 63 Allocation of nomina to taxa............................................................................................................................................. 63 Should zoological nomenclature shift to a fully monosemic system? .............................................................................. 66 The problem of redundancy .............................................................................................................................................. 69 Pseudoranked nomenclatures ............................................................................................................................................ 69 Discussion: from phylogenetic taxonomy to hierarchical nomenclature .......................................................................... 80 Conclusion ......................................................................................................................................................................... 83 References ......................................................................................................................................................................... 83