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Re: Taxa nomy (and intro)
> Sadly, this is no longer the case... with the increasing flexibility
> accorded under the PhyloCode, most specifically the acceptance of
> clauses and multiple internal specifiers in stem-based definitions, it is
> possible to define a name in a way that it may in fact refer to an entity
> that does not exist.
But still -- it must be monophyletic; it can objectively exist, or it can
objectively not exist, but if it exists, it must be monophyletic. :-)
Oh, and long live Subkingdom Placozoa = *Trichoplax adhaerens*. The super-
and sub- ranks are not mandatory, but kingdom, phylum, class, order, family
and genus are almost always treated as mandatory.