Minimal taxonomy constructor for internal use. Only use when the input is known to be valid since few validity checks are done.
Arguments
- taxa
 A taxon vector.
- supertaxa
 The indexes of
taxafor each taxon's supertaxon.
Minimal taxonomy constructor for internal use. Only use when the input is known to be valid since few validity checks are done.
A taxon vector.
The indexes of taxa for each taxon's supertaxon.