This command deletes taxa from the analysis. The correct usage is:
delete <name and/or number and/or taxset> ...
A list of the taxon names or taxon numbers (labelled 1 to ntax in the order in the matrix) or taxset(s) can be used. For example, the following:
delete 1 2 Homo_sapiens
deletes taxa 1, 2, and the taxon labelled Homo_sapiens from the analysis. You can also use "all" to delete all of the taxa. For example,
delete all
deletes all of the taxa from the analysis. Of course, a phylogenetic analysis that does not include any taxa is fairly uninteresting.